* { margin: 0; padding: 0; box-sizing: border-box; }

/* Scroll reveal animations */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.revealed { opacity: 1; transform: translateY(0); }

/* Hero text entrance */
@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-inner > * {
  animation: heroFadeUp 0.7s ease forwards;
  opacity: 0;
}
.hero-inner > *:nth-child(1) { animation-delay: 0.3s; }
.hero-inner > *:nth-child(2) { animation-delay: 0.42s; }
.hero-inner > *:nth-child(3) { animation-delay: 0.54s; }
.hero-inner > *:nth-child(4) { animation-delay: 0.66s; }
.hero-inner > *:nth-child(5) { animation-delay: 0.78s; }
.hero-inner > *:nth-child(6) { animation-delay: 0.90s; }
:root {
  --bg:       #111110;
  --surface:  #1A1A18;
  --dark-bg:  #0A0A09;
  --charcoal: #F4F4F2;
  --ash:      #8A8A88;
  --stone:    rgba(244,244,242,0.08);
  --stone-mid:rgba(244,244,242,0.15);
  --teal:     #0097A9;
  --teal-lt:  rgba(0,151,169,0.08);
  --teal-dark:#007A8A;
  --en:       'DM Sans', sans-serif;
  --display:  'Outfit', sans-serif;
  --body:     'DM Sans', sans-serif;
  --ko:       'Pretendard', 'DM Sans', sans-serif;

  /* ═══ Slide layout tokens (vh 기반 — FHD/2K/4K 공통) ═══ */
  --slide-pad-y:    clamp(48px, 6vh, 120px);
  --slide-pad-x:    clamp(32px, 4vw, 140px);
  --slide-gap-lg:   clamp(24px, 3vh, 56px);
  --slide-gap-md:   clamp(16px, 2vh, 32px);
  --slide-gap-sm:   clamp(8px, 1vh, 16px);

  /* Typography — vh 기반 */
  --fs-hero:        clamp(56px, 9vh, 172px);
  --fs-h1:          clamp(40px, 7vh, 128px);
  --fs-h2:          clamp(32px, 5.5vh, 92px);
  --fs-h3:          clamp(22px, 3.5vh, 52px);
  --fs-body-lg:     clamp(15px, 1.6vh, 24px);
  --fs-body:        clamp(13px, 1.3vh, 19px);
  --fs-sm:          clamp(11px, 1.1vh, 15px);
  --fs-tag:         clamp(9px, 0.9vh, 13px);
}
html { scroll-behavior: smooth; }
body { font-family: var(--body); background: var(--bg); color: var(--charcoal); }

nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(17,17,16,0.85);
  border-bottom: 0.5px solid rgba(244,244,242,0.06);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(32px, 4vw, 120px); height: clamp(56px, 6.5vh, 96px);
  backdrop-filter: blur(16px);
  transition: background 0.2s ease, border-color 0.2s ease;
}
/* Nav light mode for bright sections */
nav.nav-light {
  background: rgba(240,239,237,0.9);
  border-bottom-color: rgba(26,26,24,0.06);
}
nav.nav-light .nav-links a { color: rgba(26,26,24,0.55); }
/* Light mode: ALL link hovers → teal (override dark mode white) */
nav.nav-light .nav-links a:hover,
nav.nav-light .nav-links > .nav-dropdown > a:hover,
nav.nav-light .nav-links > .nav-dropdown:hover > a { color: var(--teal) !important; font-weight: 700; }
nav.nav-light .nav-links a.nav-cta { color: rgba(26,26,24,0.55); border-bottom: none; }
nav.nav-light .nav-links a.nav-cta:hover { color: var(--teal) !important; }
nav.nav-light .nav-lang { color: rgba(26,26,24,0.35); }
nav.nav-light .nav-logo img { filter: none; }
nav.nav-light .nav-home .logo-bracket { color: rgba(26,26,24,0.3); }
nav.nav-light .nav-home .logo-o { color: var(--teal); }
nav.nav-light .nav-dropdown:hover > a { color: var(--teal) !important; }
nav.nav-light .nav-dropdown-menu {
  background: rgba(240,239,237,0.95); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: none;
}
nav.nav-light .nav-dropdown-menu a { color: rgba(26,26,24,0.6); }
nav.nav-light .nav-dropdown-menu a:hover { color: var(--teal) !important; }
.nav-logo img { filter: brightness(0) invert(1); }
.nav-logo { text-decoration: none; display: flex; align-items: center; line-height: 0; }

.nav-links { display: flex; gap: clamp(32px, 3.2vw, 88px); align-items: stretch; height: 100%; }
.nav-links a { font-family: var(--display); font-size: var(--fs-tag); letter-spacing: 0.14em; text-transform: uppercase; font-weight: 500; color: rgba(244,244,242,0.55); text-decoration: none; cursor: pointer; transition: color 0.3s, transform 0.25s ease; display: flex; align-items: center; }
/* Dark nav: hover → white + bold */
.nav-links > a:hover,
.nav-links > .nav-dropdown > a:hover,
.nav-links > .nav-dropdown:hover > a { color: #F4F4F2 !important; font-weight: 700; }
.nav-links a.nav-cta { color: rgba(244,244,242,0.55); border-bottom: none; padding-bottom: 0; }
.nav-lang { font-family: var(--display); font-size: 10px; letter-spacing: 0.1em; color: rgba(244,244,242,0.4); cursor: pointer; }
.container { max-width: min(1200px, 92vw); margin: 0 auto; padding: 0 clamp(24px, 3vw, 80px); }
@media (min-width: 2000px) { .container { max-width: min(1600px, 86vw); } }
@media (min-width: 2800px) { .container { max-width: min(2000px, 80vw); } }
@media (min-width: 3600px) { .container { max-width: min(2400px, 76vw); } }

/* HERO — Dark background with 3D torus */
#home { min-height: 100vh; padding-top: 64px; display: flex; flex-direction: column; background: var(--dark-bg); position: relative; overflow: hidden; }
/* Torus guide canvas — fixed overlay */
.torus-canvas { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 55; pointer-events: none; }
.torus-canvas canvas { display: block; width: 100% !important; height: 100% !important; }
.hero-inner { flex: 1; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 80px 52px 64px; max-width: 1100px; margin: 0 auto; width: 100%; position: relative; z-index: 2; }
.hero-eyebrow { font-family: var(--display); font-size: var(--fs-tag); letter-spacing: 0.28em; text-transform: uppercase; font-weight: 400; color: var(--teal); margin-bottom: var(--slide-gap-md); }
.hero-headline {
  font-family: var(--display); font-size: var(--fs-hero);
  font-weight: 100; letter-spacing: -0.04em; line-height: 1.25;
  color: #F4F4F2; margin: 0 0 var(--slide-gap-lg);
  white-space: nowrap;
}
.hero-headline strong { font-weight: 800; letter-spacing: -0.03em; }

.hero-line { width: 36px; height: 1px; background: rgba(244,244,242,0.2); margin-bottom: var(--slide-gap-sm); }
.hero-copy-ko { font-family: var(--ko); font-size: var(--fs-body-lg); font-weight: 400; line-height: 1.8; color: rgba(244,244,242,0.6); letter-spacing: -0.02em; margin-bottom: var(--slide-gap-sm); }
.hero-copy-en { font-family: var(--body); font-size: var(--fs-body); font-weight: 300; line-height: 1.85; color: rgba(244,244,242,0.25); letter-spacing: 0.02em; margin-bottom: var(--slide-gap-lg); }
.hero-cta { display: inline-flex; align-items: center; gap: 10px; font-family: var(--display); font-size: var(--fs-tag); letter-spacing: 0.18em; text-transform: uppercase; font-weight: 600; color: var(--teal); cursor: pointer; border-bottom: 1px solid var(--teal); padding-bottom: 3px; transition: gap 0.25s; }
.hero-cta:hover { gap: 16px; }


.hero-scroll-indicator {
  display: flex; flex-direction: column; align-items: center;
  margin-top: 40px;
  animation: scrollBounce 2.5s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(8px); opacity: 1; }
}

.signal-strip { border-top: 0.5px solid rgba(244,244,242,0.06); display: flex; position: relative; z-index: 2; }
.signal-item { flex: 1; padding: 30px 40px; border-right: 0.5px solid rgba(244,244,242,0.06); text-align: center; }
.signal-item:last-child { border-right: none; }
.signal-num { font-family: var(--display); font-size: clamp(32px, 2.8vw, 44px); font-weight: 100; color: #F4F4F2; letter-spacing: -0.03em; line-height: 1; margin-bottom: 12px; }
.signal-num sup { font-size: 15px; color: var(--teal); font-weight: 600; }
.signal-label { font-family: var(--display); font-size: clamp(7px, 0.55vw, 8px); letter-spacing: 0.22em; text-transform: uppercase; font-weight: 500; color: rgba(244,244,242,0.35); margin-bottom: 5px; }
.signal-sub { font-family: var(--ko); font-size: clamp(10px, 0.7vw, 11px); font-weight: 200; color: rgba(244,244,242,0.22); letter-spacing: 0.02em; }

.sec-tag { font-family: var(--display); font-size: var(--fs-tag); letter-spacing: 0.18em; text-transform: uppercase; font-weight: 600; color: var(--teal); margin-bottom: var(--slide-gap-md); position: relative; padding-left: 18px; }
.sec-tag::before { content: ''; position: absolute; left: 0; top: 50%; width: 8px; height: 0.5px; background: var(--teal); opacity: 0.6; }
.sec-title { font-family: var(--display); font-size: var(--fs-h1); font-weight: 300; line-height: 1.08; letter-spacing: -0.02em; color: var(--charcoal); margin-bottom: var(--slide-gap-sm); }
.sec-title strong { font-weight: 900; }
.sec-sub { font-family: var(--ko); font-size: var(--fs-body-lg); font-weight: 400; line-height: 2.0; color: var(--ash); max-width: 56ch; }

/* ══════════════════════════════════════════════════════
   SCENE SYSTEM — Scroll-snap section locking
   Each scene = full-viewport page, snaps into view
   ══════════════════════════════════════════════════════ */

/* Snap container — scoped to home page */
html.home-page {
  scroll-snap-type: y proximity;
}

/* Scene — full viewport, snaps */
.scene {
  position: relative;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

/* Hero scene */
.scene-inner {
  flex: 1;
  display: flex; flex-direction: column;
  justify-content: flex-start; align-items: center; text-align: center;
  padding: 100px 52px 0;
  max-width: 1100px; margin: 0 auto; width: 100%;
  position: relative; z-index: 2;
}

/* Scene content — positioned in one half */
.scene-content {
  position: absolute; top: 0; bottom: 0;
  display: flex; flex-direction: column; justify-content: center;
  padding: 80px 60px;
  z-index: 2; width: 50%;
}
.scene-content--left { left: 5%; padding-left: 80px; padding-right: 40px; }
.scene-content--right { right: 5%; padding-right: 80px; padding-left: 40px; }
.scene-content--center {
  position: relative; width: 100%;
  max-width: 800px; margin: auto;
  text-align: center; padding: 80px 52px;
  display: flex; flex-direction: column; align-items: center;
}

/* Scene typography — agency-level dramatic contrast */
.gs-heading {
  font-family: var(--display); font-size: var(--fs-h1);
  font-weight: 300; line-height: 1.08; letter-spacing: -0.04em;
  color: #F4F4F2; margin-bottom: var(--slide-gap-md);
  white-space: nowrap;
}
.gs-heading strong { font-weight: 900; letter-spacing: -0.03em; }
/* Protocol center heading — single line */
.scene-content--center .gs-heading { white-space: nowrap; }
.gs-body {
  font-family: var(--ko); font-size: var(--fs-body-lg); font-weight: 400;
  line-height: 2.0; color: rgba(244,244,242,0.6); margin-bottom: var(--slide-gap-lg);
  max-width: 48ch; letter-spacing: 0.01em;
}
.gs-cta {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--display); font-size: 10px;
  letter-spacing: 0.18em; text-transform: uppercase;
  font-weight: 600; color: var(--teal); text-decoration: none;
  border-bottom: 1px solid rgba(0,151,169,0.4); padding-bottom: 4px;
  transition: gap 0.3s ease, border-color 0.3s ease;
}
.gs-cta:hover { gap: 12px; border-color: var(--teal); }

/* Cards — breathing hover */
.gs-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-bottom: 28px; }
.gs-card {
  background: rgba(244,244,242,0.04); padding: 32px 24px;
  border: 0.5px solid rgba(244,244,242,0.06);
  transition: background 0.4s ease, border-color 0.4s ease, transform 0.4s ease;
}
.gs-card:hover {
  background: rgba(244,244,242,0.07); border-color: rgba(0,151,169,0.15);
  transform: translateY(-2px);
}
.gs-card-title {
  font-family: var(--display); font-size: 20px; font-weight: 800;
  color: var(--charcoal); margin-bottom: 10px; letter-spacing: -0.02em;
}
.gs-card-body {
  font-family: var(--ko); font-size: clamp(12px, 0.9vw, 14px); font-weight: 400;
  color: rgba(244,244,242,0.55); line-height: 1.9; margin-bottom: 14px;
}

/* Stats — alive numbers */
.gs-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 36px; }
.gs-stat {
  text-align: center; padding: 20px 12px;
  border: 0.5px solid rgba(244,244,242,0.04);
  transition: border-color 0.4s ease;
}
.gs-stat:hover { border-color: rgba(0,151,169,0.12); }
.gs-stat-num {
  font-family: var(--display); font-size: clamp(36px, 3vw, 48px); font-weight: 300;
  color: var(--charcoal); letter-spacing: -0.03em;
}
.gs-stat-num sup { font-size: clamp(12px, 1vw, 15px); color: var(--teal); font-weight: 600; }
.gs-stat-label {
  font-family: var(--ko); font-size: clamp(9px, 0.7vw, 11px); color: rgba(244,244,242,0.4);
  margin-top: 10px; letter-spacing: 0.04em; font-weight: 400;
}

/* ── "Alive" micro-animations ── */

/* Sec-tag: subtle breathing */
.sec-tag {
  animation: tagBreathe 4s ease-in-out infinite;
}
@keyframes tagBreathe {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 1; }
}

/* CTA arrow pulse */
.gs-cta::after {
  content: '';
  display: inline-block;
  width: 4px; height: 4px;
  border-right: 1px solid var(--teal);
  border-top: 1px solid var(--teal);
  transform: rotate(45deg);
  transition: transform 0.3s ease;
}
.gs-cta:hover::after { transform: rotate(45deg) translateX(2px); }

/* Signal strip items — stagger entrance */
.signal-item {
  opacity: 0; transform: translateY(12px);
  animation: signalIn 0.6s ease forwards;
}
.signal-item:nth-child(1) { animation-delay: 0.8s; }
.signal-item:nth-child(2) { animation-delay: 0.95s; }
.signal-item:nth-child(3) { animation-delay: 1.1s; }
.signal-item:nth-child(4) { animation-delay: 1.25s; }
@keyframes signalIn {
  to { opacity: 1; transform: translateY(0); }
}

/* Hero headline — cinematic entrance */
.hero-headline {
  animation: heroReveal 1.4s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
  opacity: 0;
}
@keyframes heroReveal {
  from { opacity: 0; transform: translateY(40px) scale(0.95); letter-spacing: 0.03em; }
  to { opacity: 1; transform: translateY(0) scale(1); letter-spacing: -0.02em; }
}

/* ── Content always visible — animation is enhancement only ── */
.sc-fade {
  opacity: 1;
  transform: translateY(0);
}

/* Scene content padding refinement */
.scene-content--left { left: 6%; padding-left: 72px; padding-right: 32px; }
.scene-content--right { right: 6%; padding-right: 72px; padding-left: 32px; }


/* ── BRAND PAGE ── */
.brand-about { padding: 80px 0; background: var(--surface); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; margin-top: 56px; }
.about-body { font-family: var(--ko); font-size: clamp(14px, 1.1vw, 16px); font-weight: 400; line-height: 2.1; color: var(--charcoal); }
.about-slogan {
  font-family: var(--display); font-size: 22px; font-weight: 300;
  letter-spacing: 0.06em; color: var(--charcoal);
  border-left: 2px solid var(--teal); padding-left: 24px;
  margin-bottom: 40px; line-height: 1.5;
}
.about-pillars { display: flex; flex-direction: column; gap: 0; }
.pillar-item { padding: 20px 0; border-bottom: 0.5px solid var(--stone); }
.pillar-item:first-child { border-top: 0.5px solid var(--stone); }
.pillar-tag { font-family: var(--display); font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase; font-weight: 600; color: var(--teal); margin-bottom: 6px; }
.pillar-title { font-family: var(--ko); font-size: 15px; font-weight: 500; color: var(--charcoal); margin-bottom: 4px; }
.pillar-desc { font-family: var(--ko); font-size: 12px; font-weight: 300; line-height: 1.85; color: var(--ash); }

.brand-etymology { padding: 72px 0; background: var(--bg); }
.etymology-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-top: 56px; }
.etym-card { background: var(--surface); border: 0.5px solid var(--stone); padding: 48px 40px; }
.etym-letter { font-family: var(--display); font-size: 64px; font-weight: 700; line-height: 1; color: var(--charcoal); margin-bottom: 16px; }
.etym-letter span { color: var(--teal); }
.etym-ko { font-family: var(--ko); font-size: 22px; font-weight: 300; color: var(--charcoal); margin-bottom: 8px; }
.etym-en { font-family: var(--display); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 400; color: var(--ash); margin-bottom: 20px; }
.etym-desc { font-family: var(--ko); font-size: 13px; font-weight: 300; line-height: 1.9; color: var(--ash); }
.etym-caption { margin-top: 32px; padding-top: 24px; border-top: 0.5px solid var(--stone); font-family: var(--ko); font-size: 13px; font-weight: 300; color: var(--ash); line-height: 1.8; grid-column: 1 / -1; }

.brand-philosophy { padding: 100px 0; background: var(--dark-bg); }
.philosophy-main {
  font-family: var(--display); font-size: clamp(28px, 4vw, 52px);
  font-weight: 200; line-height: 1.3; letter-spacing: 0.02em;
  color: #F4F4F2; margin: 56px 0 48px;
}
.philosophy-body { font-family: var(--ko); font-size: clamp(14px, 1.1vw, 16px); font-weight: 400; line-height: 2.1; color: rgba(244,244,242,0.65); max-width: 640px; margin-bottom: 56px; }
.philosophy-anchor {
  font-family: var(--ko); font-size: 18px; font-weight: 300;
  color: #F4F4F2; line-height: 1.8;
  border-left: 2px solid var(--teal); padding-left: 24px;
}

.brand-values { padding: 72px 0; background: var(--surface); }
.values-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 2px; margin-top: 56px; }
.value-card { border: 0.5px solid var(--stone); padding: 40px 32px; }
.value-card-num { font-family: var(--display); font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase; font-weight: 600; color: var(--teal); margin-bottom: 20px; }
.value-card-title { font-family: var(--ko); font-size: 18px; font-weight: 400; color: var(--charcoal); margin-bottom: 12px; letter-spacing: -0.01em; line-height: 1.4; }
.value-card-desc { font-family: var(--ko); font-size: 13px; font-weight: 300; line-height: 1.9; color: var(--ash); }


/* PRODUCTS */
#products { background: var(--bg); padding: 100px 0; }
.products-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 48px; }
.sys-eq { font-family: var(--display); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 400; color: var(--ash); text-align: right; line-height: 2; }
.sys-eq strong { color: var(--teal); font-weight: 600; }
.product-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.product-card { background: var(--surface); padding: 48px 40px; border: 0.5px solid var(--stone); cursor: pointer; transition: border-color 0.2s; }
.product-card:hover { border-color: var(--teal); }
.product-num { font-family: var(--display); font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase; font-weight: 500; color: var(--teal); margin-bottom: 16px; }
.product-name { font-family: var(--display); font-size: 28px; font-weight: 300; letter-spacing: 0.01em; color: var(--charcoal); margin-bottom: 6px; line-height: 1.2; }
.product-role { font-family: var(--ko); font-size: 11px; font-weight: 400; color: var(--ash); margin-bottom: 28px; }
.product-specs { display: flex; flex-direction: column; margin-bottom: 24px; }
.spec-row { display: flex; justify-content: space-between; padding: 9px 0; border-bottom: 0.5px solid var(--stone); font-family: var(--body); font-size: 12px; }
.spec-key { font-weight: 300; color: var(--ash); }
.spec-val { font-weight: 400; color: var(--charcoal); }
.product-anchor { font-family: var(--body); font-size: 13px; font-weight: 300; color: var(--teal); line-height: 1.6; font-style: italic; }

/* SCIENCE */
#science { background: var(--dark-bg); padding: 100px 0; }
#science .sec-tag { color: var(--teal); }
#science .sec-title { color: #F4F4F2; font-weight: 200; letter-spacing: 0.02em; }
#science .sec-sub { color: rgba(244,244,242,0.4); font-family: var(--ko); }
.science-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-top: 52px; }
.science-card { background: rgba(255,255,255,0.03); border: 0.5px solid rgba(255,255,255,0.07); padding: 48px 40px; }
.sci-tag { font-family: var(--display); font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase; font-weight: 500; color: var(--teal); margin-bottom: 22px; }
.sci-num { font-family: var(--display); font-size: 64px; font-weight: 200; letter-spacing: -0.01em; color: #F4F4F2; line-height: 1; margin-bottom: 5px; }
.sci-sub { font-family: var(--display); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 400; color: rgba(244,244,242,0.28); margin-bottom: 26px; }
.sci-div { width: 28px; height: 1px; background: var(--teal); margin-bottom: 22px; }
.sci-desc { font-family: var(--ko); font-size: 13px; font-weight: 300; line-height: 1.95; color: rgba(244,244,242,0.52); }

/* TECHNOLOGY */
#technology { padding: 100px 0; }
#technology.detail-light { background: #F0EFED; }
.tech-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; margin-top: 52px; border: 0.5px solid var(--stone); }
.tech-feat { padding: 36px 32px; border-right: 0.5px solid var(--stone); border-bottom: 0.5px solid var(--stone); }
.tech-feat:nth-child(3n) { border-right: none; }
.tech-feat:nth-child(n+4) { border-bottom: none; }
.tech-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); margin-bottom: 16px; }
.tech-feat-title { font-family: var(--display); font-size: 13px; font-weight: 500; color: var(--charcoal); margin-bottom: 8px; letter-spacing: 0.01em; }
.tech-feat-desc { font-family: var(--ko); font-size: 12px; font-weight: 300; line-height: 1.85; color: var(--ash); }
.sem-strip { margin-top: 2px; background: var(--surface); border: 0.5px solid var(--stone); padding: 26px 40px; display: flex; align-items: center; gap: 48px; }
.sem-label { font-family: var(--display); font-size: 9px; letter-spacing: 0.18em; text-transform: uppercase; font-weight: 500; color: var(--ash); white-space: normal; word-break: break-all; }
.sem-vals { display: flex; gap: 48px; }
.sem-val { font-family: var(--body); font-size: 11px; font-weight: 300; color: var(--teal); letter-spacing: 0.03em; }

/* YOUR RECORD */
#your-record { background: var(--surface); padding: 100px 0; }
.record-split { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-top: 52px; }
.record-card { border: 0.5px solid var(--stone); padding: 48px 40px; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.record-card:hover { border-color: var(--teal); background: var(--teal-lt); }
.record-card-tag { font-family: var(--display); font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase; font-weight: 500; color: var(--teal); margin-bottom: 16px; }
.record-card-title { font-family: var(--display); font-size: 24px; font-weight: 300; letter-spacing: 0.01em; color: var(--charcoal); margin-bottom: 12px; line-height: 1.35; }
.record-card-desc { font-family: var(--ko); font-size: 13px; font-weight: 300; line-height: 1.9; color: var(--ash); margin-bottom: 28px; }
.record-cta { font-family: var(--display); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; font-weight: 600; color: var(--teal); border-bottom: 1px solid var(--teal); padding-bottom: 2px; display: inline-block; }

.close-strip { background: var(--bg); border-top: 0.5px solid var(--stone); padding: 80px 52px; text-align: center; }
.close-ko { font-family: var(--ko); font-size: clamp(17px, 2vw, 24px); font-weight: 300; color: var(--charcoal); line-height: 1.8; margin-bottom: 10px; letter-spacing: -0.01em; }
.close-en { font-family: var(--body); font-size: 13px; font-weight: 300; color: var(--ash); letter-spacing: 0.02em; font-style: italic; }

/* ── NARRATIVE CTA STRIP ── */
/* ═══ SECTION NUMBER — 01/02/03 ═══ */
.scene-num {
  position: absolute; top: 72px; left: 52px; z-index: 3;
  font-family: var(--display); font-size: 10px; font-weight: 300;
  letter-spacing: 0.2em; color: rgba(244,244,242,0.15);
}

/* ═══ FULLSCREEN TYPOGRAPHY — Philosophy section ═══ */
.scene-fulltype {
  display: flex; align-items: center; justify-content: center;
}
.fulltype-content {
  text-align: center; max-width: 900px; padding: 0 52px;
}
.fulltype-heading {
  font-family: var(--ko); font-size: var(--fs-h1);
  font-weight: 100; line-height: 1.35; letter-spacing: -0.03em;
  color: #F4F4F2; margin: var(--slide-gap-md) 0 var(--slide-gap-lg);
}
.fulltype-heading strong { font-weight: 800; }
.fulltype-body {
  font-family: var(--ko); font-size: var(--fs-body); font-weight: 300;
  line-height: 2.0; color: rgba(244,244,242,0.4);
  margin-bottom: var(--slide-gap-lg);
}

/* ═══ SCIENCE CENTER LAYOUT ═══ */
.scene-science-center {
  display: flex; align-items: center; justify-content: center;
}
.science-center-content {
  text-align: center; max-width: 800px; padding: 0 52px;
}
.science-center-content .sec-tag { text-align: center; }
.gs-stats--row {
  display: flex; justify-content: center; gap: 2px; margin-bottom: 40px;
}

/* ═══ LIGHT THEME SECTION (Science) ═══ */
.scene-light { background: #F0EFED; }
.scene-light .sec-tag { color: var(--teal-dark); }
.scene-light .sec-tag::before { background: var(--teal-dark); }
.scene-light .gs-heading { color: #1A1A18; }
.scene-light .gs-heading strong { color: var(--teal-dark); }
.scene-light .gs-body { color: rgba(26,26,24,0.55); }
.scene-light .gs-stat { border-color: rgba(26,26,24,0.08); }
.scene-light .gs-stat:hover { border-color: rgba(0,151,169,0.2); }
.scene-light .gs-stat-num { color: #1A1A18; }
.scene-light .gs-stat-label { color: rgba(26,26,24,0.4); }
.scene-light .gs-cta { color: var(--teal-dark); border-bottom-color: rgba(0,122,138,0.4); }
.scene-light .scene-num { color: rgba(26,26,24,0.1); }
.gs-stats--row .gs-stat { flex: 1; max-width: 160px; }

/* ═══ CTA CLOSE — fullscreen "기록" 회귀 ═══ */
.scene-close {
  display: flex; flex-direction: column; align-items: center; justify-content: space-between;
  height: calc(100vh - 54px); /* subtract nav height */
  margin-top: 54px; /* push below nav */
  scroll-snap-align: end; /* snap to bottom edge so footer is visible */
  padding: 0;
  background: #F0EFED;
  overflow: visible;
  box-sizing: border-box;
}
.close-content { text-align: center; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 0 52px; }
.close-headline {
  display: block; font-family: var(--ko); font-size: clamp(40px, 5.5vw, 80px);
  font-weight: 100; color: #1A1A18; text-decoration: none;
  letter-spacing: -0.03em; line-height: 1.25;
  transition: color 0.4s ease;
}
.close-headline strong { font-weight: 800; color: var(--teal-dark); }
.close-headline:hover { color: rgba(26,26,24,0.6); }
.close-headline:hover strong { color: #1A1A18; }
.close-links {
  display: flex; align-items: center; justify-content: center; gap: 20px;
  margin-top: 48px;
}
.close-links a {
  font-family: var(--display); font-size: 10px; letter-spacing: 0.16em;
  text-transform: uppercase; font-weight: 400;
  color: rgba(26,26,24,0.35); text-decoration: none;
  transition: color 0.3s;
}
.close-links a:hover { color: var(--teal-dark); }
.close-dot { width: 3px; height: 3px; border-radius: 50%; background: rgba(26,26,24,0.15); }

/* ═══ SCROLL DOT NAVIGATION ═══ */
.scroll-nav {
  position: fixed; right: 28px; top: 50%; transform: translateY(-50%);
  z-index: 90; display: flex; flex-direction: column; gap: 16px;
}
.scroll-nav-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(244,244,242,0.15); cursor: pointer;
  transition: background 0.3s, transform 0.3s;
  position: relative;
}
.scroll-nav-dot:hover, .scroll-nav-dot.active {
  background: var(--teal); transform: scale(1.3);
}
.scroll-nav-dot span {
  position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
  font-family: var(--display); font-size: 9px; letter-spacing: 0.1em;
  text-transform: uppercase; color: rgba(244,244,242,0.4);
  white-space: nowrap; opacity: 0; pointer-events: none;
  transition: opacity 0.3s;
}
.scroll-nav-dot:hover span { opacity: 1; }

/* Light section — dark nav dots */
.scroll-nav.light-mode .scroll-nav-dot { background: rgba(26,26,24,0.2); }
.scroll-nav.light-mode .scroll-nav-dot:hover,
.scroll-nav.light-mode .scroll-nav-dot.active { background: var(--teal-dark); }
.scroll-nav.light-mode .scroll-nav-dot span { color: rgba(26,26,24,0.5); }

/* ── PAGE FADE-IN ── */
@keyframes pageFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
body { animation: pageFadeIn 0.5s ease-out forwards; }

/* ── NAV [O] HOME ── */
.nav-home {
  font-family: var(--display) !important; font-size: 16px !important;
  font-weight: 700 !important; letter-spacing: 0 !important;
  text-transform: none !important; line-height: 1;
  padding-right: 0; border-right: none;
  margin-right: 0;
}
.nav-home .logo-bracket { font-weight: 300; color: rgba(244,244,242,0.35); transition: color 0.3s; }
.nav-home .logo-o { color: var(--teal); font-weight: 700; transition: color 0.3s; }
.nav-home:hover .logo-bracket { color: #F4F4F2; }

/* ── NAV ACTIVE STATE ── */
.nav-links a.nav-active { color: #F4F4F2; font-weight: 600; }

/* ── HAMBURGER ── */
.hamburger {
  display: none; background: none; border: none; cursor: pointer;
  width: 24px; height: 18px; position: relative; padding: 0;
}
.hamburger span {
  display: block; width: 100%; height: 1px;
  background: rgba(244,244,242,0.6); position: absolute; left: 0;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 8px; }
.hamburger span:nth-child(3) { top: 16px; }

/* ── MOBILE MENU ── */
.mobile-menu {
  display: none; position: fixed; top: 54px; left: 0; right: 0; bottom: 0;
  background: rgba(10,10,9,0.97); backdrop-filter: blur(20px);
  flex-direction: column; padding: 40px 32px; gap: 0; z-index: 99;
  overflow-y: auto;
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
  font-family: var(--display); font-size: 14px; letter-spacing: 0.08em;
  text-transform: uppercase; font-weight: 300; color: rgba(244,244,242,0.5);
  text-decoration: none; padding: 16px 0;
  border-bottom: 0.5px solid rgba(244,244,242,0.06);
  transition: color 0.3s;
}
.mobile-menu a:hover { color: #F4F4F2; }
.mobile-menu a.nav-cta { color: var(--teal); border-bottom-color: var(--teal); margin-top: 16px; }

/* ── FOOTER — minimal single line ── */
/* ═══ FOOTER — inline, blends with CTA ═══ */
.footer-inline {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; padding: 0 52px 20px;
  width: 100%; flex-shrink: 0;
}
.footer-inline span, .footer-inline a {
  font-family: var(--body); font-size: 10px; font-weight: 300;
  color: rgba(26,26,24,0.25); text-decoration: none;
}
.footer-inline a:hover { color: rgba(26,26,24,0.5); }
.footer-sep-dot { width: 2px; height: 2px; border-radius: 50%; background: rgba(26,26,24,0.15); }

/* Legacy */
.footer-minimal { display: none; }
.footer-copy-single {
  font-family: var(--ko); font-size: 11px; font-weight: 300;
  color: rgba(244,244,242,0.45); letter-spacing: 0.01em;
}

/* LOGO — CELL[O]GRAM Weight & Color System */
.logo-cell    { font-weight: 800 !important; color: var(--charcoal) !important; }
.logo-bracket { font-weight: 800 !important; color: var(--teal) !important; }
.logo-gram    { font-weight: 400 !important; color: var(--charcoal) !important; }
.footer-logo .logo-cell  { color: #F4F4F2 !important; }
.footer-logo .logo-gram  { color: #F4F4F2 !important; }


/* ── PRODUCTS PAGE ── */
.products-intro { padding: 100px 0; background: var(--bg); }
.system-statement {
  font-family: var(--ko); font-size: 16px; font-weight: 300;
  line-height: 2; color: var(--charcoal); max-width: 640px; margin: 40px 0 20px;
}
.system-formula {
  font-family: var(--display); font-size: 13px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--teal);
  margin-top: 32px;
}

.product-detail { padding: 100px 0; }
.product-detail:nth-of-type(odd) { background: var(--surface); }
.product-detail:nth-of-type(even) { background: var(--bg); }

.product-detail-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start;
  margin-top: 56px;
}
.product-detail-left {}
.product-tag {
  font-family: var(--display); font-size: 9px; letter-spacing: 0.22em;
  text-transform: uppercase; font-weight: 500; color: var(--teal); margin-bottom: 16px;
}
.product-title {
  font-family: var(--display); font-size: var(--fs-h2); font-weight: 100;
  letter-spacing: -0.01em; color: var(--charcoal); line-height: 1.1; margin-bottom: var(--slide-gap-sm);
}
.product-role-tag {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  color: var(--ash); margin-bottom: 32px;
}
.product-specs-table { width: 100%; border-collapse: collapse; margin-bottom: 32px; }
.product-specs-table tr { border-bottom: 0.5px solid var(--stone); }
.product-specs-table td {
  font-family: var(--body); font-size: 12px; padding: 10px 0;
}
.product-specs-table td:first-child { font-weight: 300; color: var(--ash); width: 40%; }
.product-specs-table td:last-child { font-weight: 400; color: var(--charcoal); }
.product-quote {
  font-family: var(--body); font-size: 13px; font-weight: 300;
  color: var(--teal); font-style: italic; line-height: 1.7;
  border-left: 2px solid var(--teal); padding-left: 16px; margin-bottom: 40px;
}
.product-body {
  font-family: var(--ko); font-size: var(--fs-body); font-weight: 300;
  line-height: 2; color: var(--ash);
}

/* Differentiator table */
.diff-table { width: 100%; border-collapse: collapse; margin: 40px 0 24px; }
.diff-table th {
  font-family: var(--display); font-size: 9px; letter-spacing: 0.18em;
  text-transform: uppercase; font-weight: 600; padding: 12px 16px;
  text-align: left; border-bottom: 1px solid var(--stone);
}
.diff-table th:first-child { color: var(--ash); }
.diff-table th:nth-child(2) { color: var(--teal); background: var(--teal-lt); }
.diff-table th:nth-child(3) { color: var(--ash); }
.diff-table td {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  padding: 12px 16px; border-bottom: 0.5px solid var(--stone);
  vertical-align: top; line-height: 1.7;
}
.diff-table td:nth-child(2) { background: var(--teal-lt); font-weight: 400; color: var(--charcoal); }
.diff-table td:first-child { color: var(--ash); }
.diff-evidence {
  font-family: var(--body); font-size: 11px; font-weight: 300;
  color: var(--ash); font-style: italic; line-height: 1.7;
  border-top: 0.5px solid var(--stone); padding-top: 12px;
}

/* Category grid */
.cat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-top: 8px; }
.cat-card { background: var(--bg); border: 0.5px solid var(--stone); padding: 20px 24px; }
.cat-num {
  font-family: var(--display); font-size: 9px; letter-spacing: 0.18em;
  text-transform: uppercase; font-weight: 600; color: var(--teal); margin-bottom: 8px;
}
.cat-title {
  font-family: var(--display); font-size: var(--fs-body-lg); font-weight: 500;
  color: var(--charcoal); margin-bottom: 6px;
}
.cat-desc { font-family: var(--ko); font-size: var(--fs-sm); font-weight: 300; line-height: 1.8; color: var(--ash); }

/* Timeline */
.timeline { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 2px; margin-top: 56px; }
.timeline-item { padding: 32px 28px; border: 0.5px solid var(--stone); background: var(--surface); }
.timeline-period {
  font-family: var(--display); font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; color: var(--teal); margin-bottom: 12px;
}
.timeline-driver {
  font-family: var(--display); font-size: 9px; letter-spacing: 0.14em;
  text-transform: uppercase; font-weight: 500; color: var(--ash); margin-bottom: 10px;
}
.timeline-effect {
  font-family: var(--ko); font-size: 13px; font-weight: 400;
  color: var(--charcoal); margin-bottom: 8px; line-height: 1.5;
}
.timeline-desc { font-family: var(--ko); font-size: 11px; font-weight: 300; line-height: 1.8; color: var(--ash); }

/* How to Use */
.howto { padding: 100px 0; background: var(--dark-bg); }
.howto-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-top: 56px; }
.howto-step { background: rgba(255,255,255,0.03); border: 0.5px solid rgba(255,255,255,0.07); padding: 40px 36px; }
.step-num {
  font-family: var(--display); font-size: 40px; font-weight: 200;
  letter-spacing: -0.02em; color: var(--teal); line-height: 1; margin-bottom: 16px;
}
.step-title {
  font-family: var(--display); font-size: 14px; font-weight: 500;
  letter-spacing: 0.04em; color: #F4F4F2; margin-bottom: 16px;
}
.step-desc { font-family: var(--ko); font-size: 13px; font-weight: 300; line-height: 1.95; color: rgba(244,244,242,0.55); }


/* ── QUALITY SECTION ── */
.quality-section {
  padding: 72px 0;
  background: var(--dark-bg);
  border-top: 0.5px solid rgba(255,255,255,0.06);
}
.quality-headline {
  font-family: var(--display); font-size: clamp(22px, 3vw, 36px);
  font-weight: 300; letter-spacing: 0.02em;
  color: #F4F4F2; margin-bottom: 16px;
}
.quality-body {
  font-family: var(--ko); font-size: 14px; font-weight: 300;
  line-height: 1.95; color: rgba(244,244,242,0.5);
  max-width: 560px; margin-bottom: 48px;
}
.quality-stamps {
  display: flex; flex-wrap: wrap; gap: 2px;
}
.quality-stamp {
  border: 0.5px solid rgba(255,255,255,0.12);
  padding: 14px 28px;
  display: flex; flex-direction: column; gap: 5px;
}
.stamp-grade {
  font-family: var(--display); font-size: 9px;
  letter-spacing: 0.2em; text-transform: uppercase;
  font-weight: 600; color: var(--teal);
}
.stamp-label {
  font-family: var(--display); font-size: 13px;
  font-weight: 300; color: #F4F4F2; letter-spacing: 0.02em;
}
.quality-divider {
  width: 0.5px; background: rgba(255,255,255,0.08);
  align-self: stretch;
}
.quality-badges {
  display: flex; gap: 24px; margin-top: 36px;
  padding-top: 36px;
  border-top: 0.5px solid rgba(255,255,255,0.06);
}
.quality-badge {
  font-family: var(--display); font-size: 10px;
  letter-spacing: 0.16em; text-transform: uppercase;
  font-weight: 400; color: rgba(244,244,242,0.35);
}
.quality-badge span { color: rgba(244,244,242,0.6); }


/* ── SCIENCE PAGE ── */
.sci-mechanism { margin-top: 40px; display: flex; flex-direction: column; gap: 0; }
.mech-step {
  display: flex; align-items: flex-start; gap: 20px;
  padding: 16px 0; border-bottom: 0.5px solid rgba(255,255,255,0.06);
}
.mech-step:last-child { border-bottom: none; }
.mech-num {
  font-family: var(--display); font-size: 11px; font-weight: 600;
  color: var(--teal); letter-spacing: 0.1em; min-width: 28px; margin-top: 1px;
}
.mech-content {}
.mech-title {
  font-family: var(--display); font-size: 12px; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase; color: #F4F4F2;
  margin-bottom: 4px;
}
.mech-desc {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  line-height: 1.8; color: rgba(244,244,242,0.45);
}
.mech-ref {
  font-family: var(--en); font-size: 10px; font-weight: 300;
  color: rgba(244,244,242,0.25); margin-top: 6px; font-style: italic;
}

.sci-pharma-badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 0.5px solid rgba(0,151,169,0.3);
  padding: 6px 14px; margin-bottom: 24px;
}
.sci-pharma-text {
  font-family: var(--display); font-size: 9px; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--teal);
}

.sci-categories { margin-top: 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; }
.sci-cat {
  padding: 14px 16px;
  background: rgba(255,255,255,0.03);
  border: 0.5px solid rgba(255,255,255,0.06);
}
.sci-cat-tag {
  font-family: var(--display); font-size: 8px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--teal);
  margin-bottom: 4px;
}
.sci-cat-name {
  font-family: var(--display); font-size: 12px; font-weight: 400;
  color: #F4F4F2; margin-bottom: 3px;
}
.sci-cat-desc {
  font-family: var(--ko); font-size: 11px; font-weight: 300;
  line-height: 1.7; color: rgba(244,244,242,0.4);
}

.sci-synergy {
  margin-top: 2px; grid-column: 1 / -1;
  background: rgba(0,151,169,0.06);
  border: 0.5px solid rgba(0,151,169,0.2);
  padding: 24px 28px;
  display: flex; align-items: center; gap: 20px;
}
.sci-synergy-formula {
  font-family: var(--display); font-size: 14px; font-weight: 300;
  letter-spacing: 0.04em; color: #F4F4F2; white-space: normal; word-break: break-word;
}
.sci-synergy-formula span { color: var(--teal); font-weight: 600; }
.sci-synergy-desc {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  line-height: 1.8; color: rgba(244,244,242,0.45);
}

.sci-refs {
  margin-top: 48px; padding-top: 32px;
  border-top: 0.5px solid rgba(255,255,255,0.06);
}
.sci-refs-title {
  font-family: var(--display); font-size: 9px; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: rgba(244,244,242,0.3); margin-bottom: 16px;
}
.sci-ref-item {
  font-family: var(--body); font-size: 11px; font-weight: 300;
  color: rgba(244,244,242,0.25); line-height: 1.9;
  padding: 6px 0; border-bottom: 0.5px solid rgba(255,255,255,0.04);
}
.sci-ref-item:last-child { border-bottom: none; }
.sci-ref-journal { color: rgba(244,244,242,0.4); font-style: italic; }


/* ── PROTOCOL PAGE ── */
.protocol-section { padding: 100px 0; background: var(--bg); }
.protocol-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 2px; margin-top: 52px; }
.protocol-card {
  background: var(--surface); border: 0.5px solid var(--stone); padding: 40px 32px;
  position: relative; overflow: hidden;
}
.protocol-badge {
  font-family: var(--display); font-size: 9px; letter-spacing: 0.2em;
  text-transform: uppercase; font-weight: 600; color: var(--teal); margin-bottom: 16px;
}
.protocol-name {
  font-family: var(--display); font-size: 22px; font-weight: 300;
  letter-spacing: 0.01em; color: var(--charcoal); margin-bottom: 8px;
}
.protocol-target {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  color: var(--ash); margin-bottom: 24px;
}
.protocol-device {
  font-family: var(--display); font-size: 11px; font-weight: 500;
  letter-spacing: 0.08em; color: var(--charcoal); margin-bottom: 6px;
}
.protocol-blur {
  position: relative; margin-top: 20px;
}
.protocol-blur-content {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  line-height: 1.85; color: var(--ash);
  filter: blur(4px); user-select: none; pointer-events: none;
}
.protocol-blur-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.protocol-lock {
  font-family: var(--display); font-size: 9px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ash); background: var(--surface);
  border: 0.5px solid var(--stone); padding: 6px 14px;
}

/* GATE */
.protocol-gate {
  margin-top: 2px; background: var(--dark-bg);
  border: 0.5px solid rgba(255,255,255,0.08);
  padding: 52px 48px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
}
.gate-left {}
.gate-icon {
  font-family: var(--display); font-size: 32px; font-weight: 200;
  color: var(--teal); margin-bottom: 20px; letter-spacing: 0.04em;
}
.gate-title {
  font-family: var(--display); font-size: 24px; font-weight: 300;
  letter-spacing: 0.01em; color: #F4F4F2; margin-bottom: 12px; line-height: 1.3;
}
.gate-desc {
  font-family: var(--ko); font-size: 13px; font-weight: 300;
  line-height: 1.95; color: rgba(244,244,242,0.45);
}
.gate-right {}
.gate-label {
  font-family: var(--display); font-size: 9px; letter-spacing: 0.18em;
  text-transform: uppercase; font-weight: 500;
  color: rgba(244,244,242,0.35); margin-bottom: 10px;
}
.gate-input-row { display: flex; gap: 2px; }
.gate-input {
  flex: 1; background: rgba(255,255,255,0.05);
  border: 0.5px solid rgba(255,255,255,0.12);
  padding: 14px 18px; color: #F4F4F2;
  font-family: var(--body); font-size: 13px; font-weight: 300;
  outline: none;
}
.gate-input::placeholder { color: rgba(244,244,242,0.25); }
.gate-input:focus { border-color: var(--teal); }
.gate-btn {
  background: var(--teal); border: none; padding: 14px 24px;
  font-family: var(--display); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; font-weight: 600; color: #fff; cursor: pointer;
  white-space: nowrap; transition: background 0.2s;
}
.gate-btn:hover { background: var(--teal-dark); }
.gate-note {
  font-family: var(--ko); font-size: 11px; font-weight: 300;
  color: rgba(244,244,242,0.25); margin-top: 12px; line-height: 1.7;
}
.gate-benefits { margin-top: 28px; display: flex; flex-direction: column; gap: 8px; }
.gate-benefit {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  color: rgba(244,244,242,0.4);
}
.gate-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--teal); flex-shrink: 0; }


/* ── PROTOCOL DEVICE SCIENCE ── */
.device-spec-row {
  display: flex; gap: 2px; margin-top: 2px;
}
.device-spec-card {
  flex: 1; background: var(--surface);
  border: 0.5px solid var(--stone); padding: 24px 20px;
}
.device-name {
  font-family: var(--display); font-size: 13px; font-weight: 600;
  letter-spacing: 0.06em; color: var(--charcoal); margin-bottom: 14px;
}
.device-badge {
  display: inline-block; font-family: var(--display); font-size: 8px;
  font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--teal); border: 0.5px solid rgba(0,151,169,0.3);
  padding: 3px 8px; margin-bottom: 12px;
}
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table td {
  font-family: var(--body); font-size: 11px; padding: 5px 0;
  border-bottom: 0.5px solid var(--stone); vertical-align: top;
}
.spec-table td:first-child {
  font-weight: 500; color: var(--ash); width: 42%; padding-right: 8px;
  font-family: var(--display); letter-spacing: 0.04em;
}
.spec-table td:last-child { color: var(--charcoal); font-weight: 300; }
.spec-table tr:last-child td { border-bottom: none; }
.channel-science {
  margin-top: 2px; background: var(--dark-bg);
  border: 0.5px solid rgba(255,255,255,0.08);
  padding: 32px 36px;
}
.channel-title {
  font-family: var(--display); font-size: 9px; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--teal);
  margin-bottom: 20px;
}
.channel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.channel-item {}
.channel-item-head {
  font-family: var(--display); font-size: 12px; font-weight: 500;
  color: #F4F4F2; margin-bottom: 6px; letter-spacing: 0.04em;
}
.channel-item-body {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  line-height: 1.85; color: rgba(244,244,242,0.45);
}
.channel-compare {
  margin-top: 20px; padding-top: 20px;
  border-top: 0.5px solid rgba(255,255,255,0.08);
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}
.compare-item { display: flex; flex-direction: column; gap: 3px; }
.compare-label {
  font-family: var(--display); font-size: 9px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: rgba(244,244,242,0.3);
}
.compare-val {
  font-family: var(--display); font-size: 13px; font-weight: 300;
  color: #F4F4F2;
}
.compare-val span { color: var(--teal); font-weight: 600; }


/* ── PROTOCOL DETAIL (GATE UNLOCKED) ── */
.protocol-detail {
  margin-top: 2px; background: var(--dark-bg);
  border: 0.5px solid rgba(255,255,255,0.08);
  padding: 52px 48px;
}
.pd-header {
  display: flex; align-items: baseline; gap: 16px;
  margin-bottom: 40px; padding-bottom: 28px;
  border-bottom: 0.5px solid rgba(255,255,255,0.08);
}
.pd-title {
  font-family: var(--display); font-size: 22px; font-weight: 300;
  color: #F4F4F2; letter-spacing: 0.01em;
}
.pd-subtitle {
  font-family: var(--display); font-size: 11px; font-weight: 400;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--teal);
}
.pd-section { margin-bottom: 40px; }
.pd-section-tag {
  font-family: var(--display); font-size: 9px; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--teal);
  margin-bottom: 16px;
}
.pd-section-title {
  font-family: var(--display); font-size: 16px; font-weight: 300;
  color: #F4F4F2; margin-bottom: 12px; letter-spacing: 0.02em;
}
.pd-body {
  font-family: var(--ko); font-size: 13px; font-weight: 300;
  line-height: 2.0; color: rgba(244,244,242,0.5);
}
.pd-note {
  font-family: var(--body); font-size: 11px; font-weight: 300;
  color: rgba(244,244,242,0.25); margin-top: 6px; font-style: italic;
}
.pd-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-top: 12px; }
.pd-card {
  background: rgba(255,255,255,0.03);
  border: 0.5px solid rgba(255,255,255,0.06);
  padding: 20px 18px;
}
.pd-card-label {
  font-family: var(--display); font-size: 9px; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--teal);
  margin-bottom: 8px;
}
.pd-card-body {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  line-height: 1.9; color: rgba(244,244,242,0.45);
}
.pd-table { width: 100%; border-collapse: collapse; margin-top: 12px; }
.pd-table th {
  font-family: var(--display); font-size: 9px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(244,244,242,0.35); padding: 8px 12px 8px 0;
  border-bottom: 0.5px solid rgba(255,255,255,0.1); text-align: left;
}
.pd-table td {
  font-family: var(--body); font-size: 12px; font-weight: 300;
  color: rgba(244,244,242,0.55); padding: 9px 12px 9px 0;
  border-bottom: 0.5px solid rgba(255,255,255,0.04); vertical-align: top;
}
.pd-table td:first-child { color: rgba(244,244,242,0.7); font-weight: 400; min-width: 80px; }
.pd-table tr:last-child td { border-bottom: none; }
.pd-mechanism {
  margin-top: 12px; display: flex; flex-direction: column; gap: 0;
}
.pd-mech-row {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 12px 0; border-bottom: 0.5px solid rgba(255,255,255,0.04);
}
.pd-mech-row:last-child { border-bottom: none; }
.pd-mech-num {
  font-family: var(--display); font-size: 10px; font-weight: 600;
  color: var(--teal); min-width: 24px; margin-top: 1px; letter-spacing: 0.08em;
}
.pd-mech-title {
  font-family: var(--display); font-size: 11px; font-weight: 500;
  color: #F4F4F2; margin-bottom: 3px; letter-spacing: 0.04em;
}
.pd-mech-body {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  line-height: 1.8; color: rgba(244,244,242,0.4);
}
.pd-ref {
  font-family: var(--body); font-size: 10px; color: rgba(244,244,242,0.2);
  font-style: italic; margin-top: 2px;
}
.pd-timeline {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px; margin-top: 12px;
}
.pd-tl-item {
  background: rgba(255,255,255,0.03);
  border: 0.5px solid rgba(255,255,255,0.06);
  padding: 16px 14px;
}
.pd-tl-period {
  font-family: var(--display); font-size: 10px; font-weight: 600;
  color: var(--teal); letter-spacing: 0.08em; margin-bottom: 6px;
}
.pd-tl-body {
  font-family: var(--ko); font-size: 11px; font-weight: 300;
  line-height: 1.8; color: rgba(244,244,242,0.4);
}
.pd-session-table { margin-top: 12px; }
.pd-divider {
  border: none; border-top: 0.5px solid rgba(255,255,255,0.08);
  margin: 32px 0;
}


/* ── EVIDENCE SECTION ── */
.pd-evidence-block {
  margin-top: 16px; display: flex; flex-direction: column; gap: 2px;
}
.pd-ev-item {
  display: grid; grid-template-columns: 40px 1fr;
  background: rgba(255,255,255,0.02);
  border: 0.5px solid rgba(255,255,255,0.05);
  padding: 14px 16px; gap: 12px; align-items: start;
}
.pd-ev-num {
  font-family: var(--display); font-size: 9px; font-weight: 600;
  color: var(--teal); letter-spacing: 0.12em; margin-top: 2px;
}
.pd-ev-title {
  font-family: var(--display); font-size: 11px; font-weight: 500;
  color: rgba(244,244,242,0.8); margin-bottom: 3px; letter-spacing: 0.03em;
}
.pd-ev-body {
  font-family: var(--ko); font-size: 11px; font-weight: 300;
  line-height: 1.8; color: rgba(244,244,242,0.4);
}
.pd-ev-ref {
  font-family: var(--body); font-size: 10px; color: rgba(244,244,242,0.2);
  font-style: italic; margin-top: 4px;
}
.pd-section-sub {
  font-family: var(--display); font-size: 12px; font-weight: 400;
  color: rgba(244,244,242,0.5); letter-spacing: 0.06em; margin: 20px 0 10px;
  padding-bottom: 8px; border-bottom: 0.5px solid rgba(255,255,255,0.06);
}
.pd-protocol-label {
  display: inline-block; font-family: var(--display); font-size: 8px;
  font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase;
  color: #1A1A18; background: var(--teal); padding: 3px 10px;
  margin-bottom: 14px;
}
.pd-ref-table { width: 100%; border-collapse: collapse; margin-top: 12px; }
.pd-ref-table td {
  font-family: var(--body); font-size: 10px; font-weight: 300;
  color: rgba(244,244,242,0.3); padding: 5px 8px 5px 0;
  border-bottom: 0.5px solid rgba(255,255,255,0.03); vertical-align: top;
  font-style: italic; line-height: 1.6;
}
.pd-ref-table td:first-child {
  font-style: normal; font-weight: 500;
  color: rgba(244,244,242,0.2); white-space: nowrap; padding-right: 12px;
  min-width: 32px;
}
.pd-ref-table tr:last-child td { border-bottom: none; }


/* ═══════════════════════════════════════
   RESPONSIVE — TABLET 768px
═══════════════════════════════════════ */
@media (max-width: 768px) {

  /* NAV */
  .nav-links { display: none; }
  .nav-cta { display: none; }
  nav { padding: 0 20px; }
  .hamburger { display: block; }
  .nav-logo { font-size: 15px; }

  /* CONTAINER */
  .container { padding: 0 20px; }

  /* SECTION SPACING */
  section { padding: 64px 0 !important; }

  /* HERO */
  .hero-sphere { display: none; }
  #home { min-height: 80vh; }
  .hero-headline { font-size: clamp(28px, 8vw, 48px) !important; }
  .hero-inner { padding: 60px 24px 40px; }

  /* SIGNAL STRIP */
  .signal-strip {
    grid-template-columns: 1fr 1fr;
    gap: 1px;
  }

  /* BRAND / ABOUT */
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-pillars { grid-template-columns: 1fr; gap: 2px; }
  .etymology-grid { grid-template-columns: 1fr; gap: 2px; }
  .values-row { grid-template-columns: 1fr; gap: 2px; }

  /* PRODUCTS */
  .products-header { grid-template-columns: 1fr; gap: 24px; }
  .product-cards { grid-template-columns: 1fr; gap: 2px; }
  .product-specs { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 1fr; gap: 2px; }
  .product-detail-grid { grid-template-columns: 1fr; gap: 2px; }
  .cat-grid { grid-template-columns: 1fr 1fr; gap: 2px; }
  .timeline { grid-template-columns: 1fr 1fr; gap: 2px; }
  .howto-grid { grid-template-columns: 1fr; gap: 2px; }
  .quality-stamps { grid-template-columns: 1fr 1fr; gap: 2px; }
  .quality-badges { flex-direction: column; gap: 2px; }

  /* SCIENCE */
  .science-grid { grid-template-columns: 1fr; gap: 2px; }
  .sci-mechanism { grid-template-columns: 1fr; gap: 2px; }
  .sci-categories { grid-template-columns: 1fr; gap: 2px; }
  .sci-synergy { grid-template-columns: 1fr; gap: 2px; }

  /* TECHNOLOGY */
  .tech-grid { grid-template-columns: 1fr 1fr; gap: 2px; }
  .sem-strip { grid-template-columns: 1fr; gap: 2px; }
  .sem-vals { grid-template-columns: 1fr 1fr; gap: 2px; }

  /* PROTOCOL — DEVICE SPECS */
  .device-spec-row { flex-direction: column; gap: 2px; }
  .device-spec-card { width: 100%; }

  /* PROTOCOL — CHANNEL SCIENCE */
  .channel-science { padding: 24px 20px; }
  .channel-grid { grid-template-columns: 1fr; gap: 20px; }
  .channel-compare { grid-template-columns: 1fr 1fr; gap: 12px; }

  /* PROTOCOL DETAIL */
  .protocol-detail { padding: 32px 20px; }
  .pd-header { flex-direction: column; gap: 8px; }
  .pd-grid { grid-template-columns: 1fr; gap: 2px; }
  .pd-timeline { grid-template-columns: 1fr 1fr; gap: 2px; }
  .pd-evidence-block { gap: 2px; }
  .pd-ev-item { grid-template-columns: 32px 1fr; }

  /* CONTACT */
  .record-split { grid-template-columns: 1fr; gap: 2px; }

  /* FOOTER */
  footer { grid-template-columns: 1fr; gap: 24px; text-align: left; }

  /* SECTION TITLES */
  .sec-title { font-size: clamp(28px, 7vw, 44px); }
}

/* ═══════════════════════════════════════
   RESPONSIVE — MOBILE 480px
═══════════════════════════════════════ */
@media (max-width: 480px) {

  /* CONTAINER */
  .container { padding: 0 16px; }

  /* SECTION SPACING */
  section { padding: 52px 0 !important; }

  /* HERO */
  .hero-title { font-size: clamp(28px, 9vw, 40px); line-height: 1.15; }
  .hero-eyebrow { font-size: 9px; }

  /* SIGNAL STRIP — 1 column scroll */
  .signal-strip {
    grid-template-columns: 1fr;
    gap: 1px;
  }
  .signal-item { padding: 20px 16px; }
  .signal-num { font-size: clamp(36px, 12vw, 56px); }

  /* ETYMOLOGY */
  .etym-cell { padding: 24px 16px; }
  .etym-word { font-size: clamp(28px, 9vw, 44px); }

  /* PRODUCT CARDS */
  .product-card { padding: 28px 20px; }

  /* CAT GRID — 1 col on very small */
  .cat-grid { grid-template-columns: 1fr; }

  /* TIMELINE — 1 col */
  .timeline { grid-template-columns: 1fr; }

  /* QUALITY STAMPS */
  .quality-stamps { grid-template-columns: 1fr 1fr; }

  /* TECH GRID — 1 col */
  .tech-grid { grid-template-columns: 1fr; }

  /* CHANNEL COMPARE */
  .channel-compare { grid-template-columns: 1fr; }

  /* PROTOCOL DETAIL */
  .pd-header { padding-bottom: 20px; }
  .pd-title { font-size: 18px; }
  .pd-timeline { grid-template-columns: 1fr 1fr; }
  .pd-ev-item { grid-template-columns: 28px 1fr; padding: 12px 12px; }
  .pd-ev-body { font-size: 11px; }

  /* TABLES — horizontal scroll */
  .pd-table { font-size: 11px; }
  .pd-table th, .pd-table td { padding: 7px 8px 7px 0; font-size: 11px; }
  .spec-table td { font-size: 11px; }

  /* RECORD */
  .record-card { padding: 28px 20px; }

  /* SECTION TITLES */
  .sec-title { font-size: clamp(24px, 8vw, 36px); }
  .sec-sub { font-size: 12px; }
  .sec-tag { font-size: 8px; }

  /* DEVICE SPEC */
  .device-spec-row { gap: 2px; }
}

/* ═══════════════════════════════════════
   NAV MOBILE TOGGLE (Simple)
═══════════════════════════════════════ */
@media (max-width: 768px) {
  .nav-mobile-btn {
    display: flex;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 8px;
  }
  .nav-mobile-btn span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--charcoal);
    transition: 0.3s;
  }
  .nav-mobile-menu {
    position: fixed;
    top: 52px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 0.5px solid var(--stone);
    padding: 24px 20px;
    display: none;
    flex-direction: column;
    gap: 0;
    z-index: 999;
  }
  .nav-mobile-menu.open { display: flex; }
  .nav-mobile-menu a {
    font-family: var(--display);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--charcoal);
    text-decoration: none;
    padding: 14px 0;
    border-bottom: 0.5px solid var(--stone);
  }
  .nav-mobile-menu a:last-child { border-bottom: none; }
}

@media (min-width: 769px) {
  .nav-mobile-btn { display: none !important; }
  .nav-mobile-menu { display: none !important; }
}


/* TABLE OVERFLOW ON MOBILE */
@media (max-width: 600px) {
  .pd-table, .spec-table, .pd-ref-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .howto-grid { gap: 2px; }
  .pd-section { margin-bottom: 28px; }
  .pd-section-sub { font-size: 11px; margin: 14px 0 8px; }
  .channel-science { padding: 20px 16px; }
  .channel-grid { gap: 16px; }
  .channel-item-head { font-size: 12px; }
  .channel-item-body { font-size: 11px; }
  .compare-val { font-size: 12px; }
  .compare-label { font-size: 8px; }
  .pd-ref-table td { font-size: 10px; }
  .device-spec-row { display: flex; flex-direction: column; }
}


/* SCI SYNERGY MOBILE FIX */
@media (max-width: 768px) {
  .sci-synergy {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 20px 16px;
  }
  .sci-synergy-formula {
    font-size: 13px;
    white-space: normal;
    word-break: break-word;
    line-height: 1.6;
  }
  .system-statement {
    font-size: 14px;
    max-width: 100%;
    word-break: keep-all;
  }
  .system-formula {
    font-size: 11px;
    letter-spacing: 0.1em;
    word-break: break-word;
    white-space: normal;
  }
  .products-intro { padding: 60px 0; }
}


/* ═══════════════════════════════════════
   DESKTOP REFINEMENTS 1024px+
═══════════════════════════════════════ */

/* 1. 전체 body overflow-x 방지 */
body { overflow-x: hidden; }

/* 2. quality-stamp: flex basis 고정으로 4개 균등 배분 */
.quality-stamp { flex: 1; min-width: 180px; }

/* 3. pd-ref-table font size 데스크탑 */
.pd-ref-table td { font-size: 11px; }

/* 4. science-grid align-items: start → 높이 불균일 OK */
.science-grid { align-items: start; }

/* 5. product-detail-grid right col 이미지 없을 때 배경 처리 */
.product-detail-grid > div:last-child:not(.product-detail-left) {
  min-height: 200px;
}

/* 6. 1400px+ 와이드 스크린 — 컨테이너/패딩만, 폰트는 vh 토큰 사용 */
@media (min-width: 1400px) {
  .hero-inner { padding: 80px 60px 64px; }
  .protocol-detail { padding: 60px 56px; }
}

/* 7. 1024px – 1280px 중간 데스크탑 */
@media (min-width: 1025px) and (max-width: 1280px) {
  .container { padding: 0 40px; }
  .hero-inner { padding: 72px 40px 56px; }
  .about-grid { gap: 60px; }
  .product-detail-grid { gap: 60px; }
}

/* 8. 텍스트 가독성 개선 - 데스크탑 body font */
.pd-body { font-size: 13px; }
.pd-mech-body { font-size: 12px; }
.pd-card-body { font-size: 12px; }

/* 9. Hover states 데스크탑 전용 */
@media (hover: hover) {
  .pillar-item:hover {
    background: rgba(0,151,169,0.03);
    padding-left: 8px;
    transition: all 0.2s;
  }
  .product-card:hover {
    border-color: rgba(0,151,169,0.3);
    transition: border-color 0.2s;
  }
  .record-card:hover {
    background: rgba(0,151,169,0.03);
    transition: background 0.2s;
  }
  .pd-tl-item:hover {
    border-color: rgba(0,151,169,0.2);
    background: rgba(0,151,169,0.04);
    transition: all 0.2s;
  }
  .nav-links a:hover {
    color: var(--teal);
    transition: color 0.15s;
  }
}

/* 10. Table 줄간격 데스크탑 */
.pd-table th, .pd-table td { padding: 10px 12px 10px 0; }
.spec-table td { padding: 6px 0; }

/* 11. channel-compare 데스크탑 여백 */
.channel-compare { padding-top: 24px; margin-top: 24px; }

/* 12. Protocol detail section 간격 */
.pd-section { margin-bottom: 44px; }
.pd-section:last-child { margin-bottom: 0; }

/* 13. evidence block 간격 */
.pd-evidence-block { margin-top: 14px; }
.pd-ev-item { padding: 16px 20px; }


/* NAV ANCHOR OFFSET */
:target {
  scroll-margin-top: 60px;
}
section[id] {
  scroll-margin-top: 52px;
}


/* LOGO IMAGE ADJUSTMENTS */
.nav-logo img { display: block; height: 20px; width: auto; }
.hero-logo img { display: block; height: clamp(36px, 5vw, 64px); width: auto; }
.footer-logo img { display: block; height: 18px; width: auto; }

/* Dark/light logo swap on dark sections */
.hero-logo { line-height: 0; }

@media (max-width: 768px) {
  .nav-logo img { height: 18px; }
}
/* ── Nav Overlay — dims content when dropdown is open ── */
.nav-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 95; /* below nav(100), above content */
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s;
}
body.nav-overlay-active .nav-overlay {
  opacity: 0 !important; visibility: hidden !important; pointer-events: none !important;
}

/* ── Nav Dropdown ── */
.nav-dropdown { position: relative; display: flex; align-items: center; align-self: stretch; }
.nav-dropdown > a { transition: color 0.3s ease, font-weight 0.15s ease; }
/* Dark mode: hover → white bold */
.nav-dropdown:hover > a { color: #F4F4F2; font-weight: 700; }
/* Light mode: hover → teal bold (override) */
nav.nav-light .nav-dropdown:hover > a { color: var(--teal) !important; font-weight: 700; }

.nav-dropdown-menu {
  position: absolute; top: 100%; left: -16px; transform: translateY(4px);
  background: transparent;
  backdrop-filter: none; -webkit-backdrop-filter: none;
  border: none; border-radius: 0;
  padding: 12px 20px 10px; min-width: 200px;
  z-index: 200;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
}
.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateY(0);
}
.nav-dropdown-menu a {
  display: block; padding: 10px 0;
  font-family: var(--display); font-size: clamp(11px, 0.85vw, 13px); letter-spacing: 0.1em;
  text-transform: uppercase; font-weight: 400;
  color: rgba(244,244,242,0.7);
  text-decoration: none;
  transition: color 0.2s ease, font-weight 0.15s, transform 0.2s ease;
}
.nav-dropdown-menu a:hover {
  color: var(--teal) !important; font-weight: 700;
  transform: translateX(3px);
}

/* Light mode dropdown — transparent, no box */
nav.nav-light .nav-dropdown-menu {
  background: transparent !important;
  border: none !important;
  box-shadow: none;
}
nav.nav-light .nav-dropdown-menu a {
  color: rgba(26,26,24,0.6) !important;
}
nav.nav-light .nav-dropdown-menu a:hover {
  color: var(--teal) !important; font-weight: 700;
}

@media (max-width: 768px) {
  .nav-dropdown-menu { display: none !important; }
}

/* ── FAQ Accordion ── */
.faq-section { padding: 0 0 100px; }
.faq-grid { margin-top: 48px; }
.faq-category {
  margin-bottom: 48px;
}
.faq-category-tag {
  font-family: var(--display); font-size: 9px; letter-spacing: 0.18em;
  text-transform: uppercase; font-weight: 600; color: var(--teal);
  margin-bottom: 16px; padding-left: 2px;
}
.faq-item {
  border-top: 0.5px solid var(--stone);
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-item summary {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 20px 2px; cursor: pointer;
  font-family: var(--ko); font-size: 14px; font-weight: 400;
  color: var(--charcoal); line-height: 1.7;
  list-style: none; transition: color 0.3s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; flex-shrink: 0; margin-left: 20px;
  font-family: var(--display); font-size: 18px; font-weight: 200;
  color: var(--ash); transition: transform 0.3s, color 0.3s;
}
.faq-item[open] summary::after {
  content: '−'; color: var(--teal);
}
.faq-item summary:hover { color: var(--teal); }
.faq-answer {
  padding: 0 2px 24px 2px;
  font-family: var(--ko); font-size: 13px; font-weight: 300;
  line-height: 2; color: var(--ash);
  max-width: 800px;
}
.faq-answer strong {
  font-weight: 500; color: rgba(244,244,242,0.75);
}
.faq-answer .faq-highlight {
  color: var(--teal); font-weight: 400;
}
.faq-answer .faq-ref {
  display: block; margin-top: 8px;
  font-family: var(--en); font-size: 10px; font-style: italic;
  color: rgba(244,244,242,0.25); letter-spacing: 0.02em;
}
@media (max-width: 768px) {
  .faq-item summary { font-size: 13px; padding: 16px 2px; }
  .faq-answer { font-size: 12px; }
}


/* ═══════════════════════════════════════
   STEP 4-8 — VISUAL ENHANCEMENTS
═══════════════════════════════════════ */

/* ── Film Grain Overlay ── */
.film-grain {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: 99980; pointer-events: none; opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ── Gradient Blob (ambient background motion) ── */
.gradient-blob {
  position: fixed; top: -30%; left: -20%; width: 140%; height: 140%;
  z-index: -1; pointer-events: none; opacity: 0.4;
  background: radial-gradient(ellipse 40% 50% at 30% 40%, rgba(0,151,169,0.04) 0%, transparent 60%),
              radial-gradient(ellipse 30% 40% at 70% 60%, rgba(0,151,169,0.03) 0%, transparent 50%);
  animation: gradientDrift 25s ease-in-out infinite alternate;
}
@keyframes gradientDrift {
  0%   { transform: translate(0, 0) rotate(0deg); }
  33%  { transform: translate(2%, -3%) rotate(1deg); }
  66%  { transform: translate(-1%, 2%) rotate(-0.5deg); }
  100% { transform: translate(1%, -1%) rotate(0.5deg); }
}

/* ── Card Lift Hover — Ferrari: no shadow, border only ── */
@media (hover: hover) {
  .card-lift {
    transition: transform 0.3s ease, border-color 0.3s ease;
  }
  .card-lift:hover {
    transform: translateY(-2px);
    border-color: rgba(0,151,169,0.15) !important;
  }
}

/* ── Link Underline Draw ── */
.link-draw {
  position: relative;
  text-decoration: none;
}
.link-draw::after {
  content: '';
  position: absolute; bottom: -2px; left: 0;
  width: 100%; height: 1px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.4s cubic-bezier(0.23,1,0.32,1);
}
.link-draw:hover::after {
  transform: scaleX(1);
}

/* ── Magnetic button base ── */
.magnetic {
  display: inline-block;
  will-change: transform;
}

/* ── Text split containers ── */
.text-reveal {
  overflow: hidden;
}
.split-word {
  will-change: transform, opacity;
}

/* ── Counter animation ── */
.count-up {
  font-variant-numeric: tabular-nums;
}

/* ── Stagger group items ── */
.stagger-item {
  will-change: transform, opacity;
}

/* ── Line draw element ── */
.line-draw {
  display: block;
  will-change: transform;
}

/* ═══════════════════════════════════════════════════
   DETAIL PAGE SYSTEM — shared across all sub-pages
   ═══════════════════════════════════════════════════ */

/* ── Detail Page Hero ── */
/* ── Detail Hero — 70vh, center aligned ── */
.detail-hero {
  min-height: 100vh; padding: 54px 52px 80px;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  text-align: center;
  position: relative; background: var(--dark-bg);
}
.detail-hero .sec-tag { margin-bottom: 20px; padding-left: 0; }
.detail-hero .sec-tag::before { display: none; }
.detail-hero .detail-hero-sub { margin: 0 auto; }
.detail-hero-title {
  font-family: var(--ko); font-size: var(--fs-h1);
  font-weight: 100; letter-spacing: -0.03em; line-height: 1.25;
  color: #F4F4F2; margin-bottom: var(--slide-gap-md);
}
.detail-hero-title strong { font-weight: 800; }
.detail-hero-sub {
  font-family: var(--ko); font-size: var(--fs-body); font-weight: 300;
  line-height: 2.0; color: rgba(244,244,242,0.4); max-width: 560px;
}
.detail-hero-line {
  width: 40px; height: 0.5px; background: rgba(244,244,242,0.15); margin: 32px 0 0;
}

/* ── Visual Placeholder — product/model image slots ── */
.visual-slot {
  position: absolute; right: 52px; bottom: 80px;
  width: 320px; height: 320px;
  border: 0.5px dashed rgba(244,244,242,0.08);
  border-radius: 2px;
  display: flex; align-items: center; justify-content: center;
}
.visual-slot-label {
  font-family: var(--display); font-size: 9px; letter-spacing: 0.15em;
  text-transform: uppercase; color: rgba(244,244,242,0.12);
}
/* Product hero — 2-column with visual */
.detail-hero--product {
  flex-direction: row; align-items: center; justify-content: center;
  gap: 60px;
}
.detail-hero--product .detail-hero-text { flex: 0 1 auto; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; }
.detail-hero--product .visual-slot {
  position: relative; right: auto; bottom: auto;
  flex-shrink: 0;
}

/* ── Detail Section Typography — weight contrast ── */
.detail-section .sec-title {
  font-weight: 100; letter-spacing: -0.03em;
}
.detail-section .sec-title strong { font-weight: 800; }

/* ── Detail CTA — matches main page close ── */
.detail-cta {
  padding: 100px 52px 24px; text-align: center;
  background: #F0EFED;
}
.detail-cta-headline {
  font-family: var(--ko); font-size: var(--fs-h2);
  font-weight: 300; color: #1A1A18; text-decoration: none;
  letter-spacing: -0.02em; line-height: 1.4;
  display: inline-block; transition: color 0.3s;
}
.detail-cta-headline:hover { color: var(--teal-dark); }
.detail-cta-sub {
  font-family: var(--ko); font-size: 12px; font-weight: 300;
  color: rgba(26,26,24,0.3); margin-top: 16px;
}
.detail-footer {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; padding: 24px 52px 32px;
  background: #F0EFED;
}
.detail-footer span, .detail-footer a {
  font-family: var(--body); font-size: 10px; font-weight: 300;
  color: rgba(26,26,24,0.25); text-decoration: none;
}
.detail-footer a:hover { color: rgba(26,26,24,0.5); }
.detail-footer .footer-sep-dot { width: 2px; height: 2px; border-radius: 50%; background: rgba(26,26,24,0.15); }

/* ── Section alternating backgrounds ── */
.detail-section:nth-of-type(even) { background: var(--surface); }
.detail-section:nth-of-type(odd) { background: var(--bg); }

/* ── Accordion (Protocol page) ── */
.accordion-section { border-bottom: 0.5px solid var(--stone); }
.accordion-trigger {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 24px 0; cursor: pointer; background: none; border: none;
  font-family: var(--ko); font-size: 16px; font-weight: 500;
  color: var(--charcoal); text-align: left; letter-spacing: -0.01em;
}
.accordion-trigger:hover { color: var(--teal); }
/* Accordion on light background */
.detail-light .accordion-trigger { color: #1A1A18; }
.detail-light .accordion-trigger:hover { color: var(--teal-dark); }
.detail-light .accordion-section { border-bottom-color: rgba(26,26,24,0.1); }
.detail-light .accordion-icon::before, .detail-light .accordion-icon::after { background: rgba(26,26,24,0.4); }
.accordion-icon {
  width: 20px; height: 20px; position: relative; flex-shrink: 0;
}
.accordion-icon::before, .accordion-icon::after {
  content: ''; position: absolute; background: rgba(244,244,242,0.4);
  transition: transform 0.3s;
}
.accordion-icon::before { width: 12px; height: 1px; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.accordion-icon::after { width: 1px; height: 12px; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.accordion-section.open .accordion-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.accordion-body {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
}
.accordion-section.open .accordion-body { max-height: 2000px; }
.accordion-body-inner { padding: 0 0 32px; }

/* ── Light section for detail pages ── */
.detail-light { background: #F0EFED; }
.detail-light .sec-tag { color: var(--teal-dark); }
.detail-light .sec-tag::before { background: var(--teal-dark); }
.detail-light .sec-title { color: #1A1A18; }
.detail-light .sec-title strong { color: var(--teal-dark); }
.detail-light .sec-sub { color: rgba(26,26,24,0.5); }
.detail-light .pillar-title, .detail-light .value-card-title { color: #1A1A18; }
.detail-light .pillar-desc, .detail-light .value-card-desc { color: rgba(26,26,24,0.5); }
.detail-light .about-body { color: rgba(26,26,24,0.6); }
/* Tech features on light background — stronger contrast */
.detail-light .tech-grid { border-color: rgba(26,26,24,0.1); }
.detail-light .tech-feat { border-color: rgba(26,26,24,0.1); }
.detail-light .tech-feat-title { color: #1A1A18; }
.detail-light .tech-feat-desc { color: rgba(26,26,24,0.6); }
.detail-light .tech-dot { background: var(--teal-dark); }
.detail-light .sem-label { color: rgba(26,26,24,0.5); }
.detail-light .sem-val { color: var(--teal-dark); }
.detail-light .sec-sub { color: rgba(26,26,24,0.5); }
.detail-light .etym-card { background: rgba(26,26,24,0.04); border-color: rgba(26,26,24,0.08); }
.detail-light .etym-letter { color: #1A1A18; }
.detail-light .etym-ko { color: #1A1A18; }
.detail-light .etym-en { color: rgba(26,26,24,0.45); }
.detail-light .etym-desc { color: rgba(26,26,24,0.5); }
.detail-light .etym-caption { color: rgba(26,26,24,0.45); border-top-color: rgba(26,26,24,0.08); }
.detail-light .value-card { border-color: rgba(26,26,24,0.08); }
.detail-light .value-card-num { color: var(--teal-dark); }
.detail-light .value-card-title { color: #1A1A18; }
.detail-light .value-card-desc { color: rgba(26,26,24,0.5); }
.detail-light .about-slogan { color: #1A1A18; border-left-color: var(--teal-dark); }
.detail-light .pillar-item { border-bottom-color: rgba(26,26,24,0.08); }
.detail-light .pillar-item:first-child { border-top-color: rgba(26,26,24,0.08); }
.detail-light .pillar-tag { color: var(--teal-dark); }

/* FAQ on light background */
.detail-light .faq-category-tag { color: var(--teal-dark); }
.detail-light .faq-item { border-bottom-color: rgba(26,26,24,0.08); }
.detail-light .faq-item summary { color: #1A1A18; }
.detail-light .faq-item summary:hover { color: var(--teal-dark); }
.detail-light .faq-item summary::after { color: rgba(26,26,24,0.3); }
.detail-light .faq-answer { color: rgba(26,26,24,0.55); }
.detail-light .faq-answer strong { color: #1A1A18; }
.detail-light .faq-answer .faq-highlight { color: var(--teal-dark); }
.detail-light .faq-answer .faq-ref { color: rgba(26,26,24,0.35); }
/* Record cards on dark bg after light FAQ */
.detail-light .record-card { border-color: rgba(26,26,24,0.08); }
.detail-light .record-card:hover { border-color: var(--teal-dark); background: rgba(0,122,138,0.04); }

/* ═══ DETAIL PAGE SNAP SYSTEM — 엄격 1섹션 1슬라이드 (100vh) ═══ */

html.detail-page {
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
}
.dp-container {
  /* no special scroll — html handles it */
}

/* 엄격 슬라이드: 정확히 뷰포트 높이 */
.dp-slide {
  height: 100vh;
  min-height: 100vh;
  max-height: 100vh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
}

/* 레거시 오버플로 클래스 → 엄격 슬라이드와 동일 동작 */
.dp-slide--overflow {
  height: 100vh;
  min-height: 100vh;
  max-height: 100vh;
  overflow: hidden;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

/* 콘텐츠 밀도가 큰 슬라이드 — 내부 스크롤 허용 (슬라이드 자체는 여전히 100vh 스냅) */
.dp-slide--scroll {
  overflow-y: auto;
  overflow-x: hidden;
  justify-content: flex-start;
  padding-top: clamp(80px, 10vh, 160px);
  padding-bottom: var(--slide-pad-y);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(244,244,242,0.2) transparent;
}
.dp-slide--scroll::-webkit-scrollbar { width: 4px; }
.dp-slide--scroll::-webkit-scrollbar-thumb { background: rgba(244,244,242,0.2); }
.dp-slide--scroll::-webkit-scrollbar-track { background: transparent; }

.dp-slide-scroll {
  width: 100%;
  max-width: min(1600px, 92vw);
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0 auto;
}

/* Merged CTA+footer slide */
.dp-slide--merged {
  height: auto;
  min-height: 100vh;
  max-height: none;
  scroll-snap-align: end;
  justify-content: space-between;
  overflow: visible;
}

/* Scroll indicator for overflow slides */
.dp-overflow-hint {
  position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%);
  z-index: 5; display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.dp-overflow-hint span {
  font-family: var(--display); font-size: 8px; letter-spacing: 0.15em;
  text-transform: uppercase; color: rgba(244,244,242,0.2);
}
.dp-overflow-hint::after {
  content: ''; width: 1px; height: 20px;
  background: linear-gradient(to bottom, rgba(244,244,242,0.2), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* Detail dot navigation */
.dp-nav {
  position: fixed; right: 28px; top: 50%; transform: translateY(-50%);
  z-index: 90; display: flex; flex-direction: column; gap: 16px;
}
.dp-nav-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(244,244,242,0.15); cursor: pointer;
  transition: background 0.3s, transform 0.3s;
  position: relative;
}
.dp-nav-dot:hover, .dp-nav-dot.active {
  background: var(--teal); transform: scale(1.3);
}
.dp-nav-dot span {
  position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
  font-family: var(--display); font-size: 9px; letter-spacing: 0.1em;
  text-transform: uppercase; color: rgba(244,244,242,0.4);
  white-space: nowrap; opacity: 0; pointer-events: none;
  transition: opacity 0.3s;
}
.dp-nav-dot:hover span { opacity: 1; }
.dp-nav.light-mode .dp-nav-dot { background: rgba(26,26,24,0.2); }
.dp-nav.light-mode .dp-nav-dot:hover,
.dp-nav.light-mode .dp-nav-dot.active { background: var(--teal-dark); }
.dp-nav.light-mode .dp-nav-dot span { color: rgba(26,26,24,0.5); }

/* ── Responsive: disable enhancements on mobile ── */
@media (max-width: 768px) {
  .film-grain { display: none; }
  .gradient-blob { display: none; }
  .ambient-particles { display: none !important; }
  .magnetic { will-change: auto; }
  .text-reveal { overflow: visible; }
  .detail-hero { min-height: 40vh; padding: 100px 24px 48px; }
  .detail-hero-title { font-size: clamp(24px, 7vw, 40px); }
  html.detail-page { scroll-snap-type: none; }
  .dp-slide { min-height: auto; scroll-snap-align: none; }
  .dp-nav { display: none; }
}

/* ── v2 Subpage Typography Alignment ── */
.detail-section .sec-sub { text-align: left; max-width: 620px; }
.detail-section p { line-height: 1.9; }

/* ── Next Page Navigator ── */
.page-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 52px; margin-top: 40px; gap: 20px;
}
.page-nav a {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--display); font-size: clamp(9px, 0.65vw, 10px);
  letter-spacing: 0.18em; text-transform: uppercase; font-weight: 500;
  color: rgba(244,244,242,0.3); text-decoration: none;
  transition: color 0.3s ease, gap 0.3s ease;
}
.page-nav a:hover { color: var(--teal); gap: 16px; }
.detail-light .page-nav a { color: rgba(26,26,24,0.3); }
.detail-light .page-nav a:hover { color: var(--teal); }
@media (max-width: 768px) {
  .page-nav { padding: 0 24px; flex-direction: column; gap: 16px; }
}

/* ═══ FIX 1: Subpage Typography Visibility ═══ */
/* Detail section headings — BOLD for readability */
.detail-section .sec-title {
  font-weight: 400 !important; letter-spacing: -0.02em;
  color: #F4F4F2;
}
.detail-section .sec-title strong {
  font-weight: 900 !important;
}
.detail-light .detail-section .sec-title,
.detail-light .sec-title { color: #1A1A18 !important; font-weight: 400 !important; }
.detail-light .detail-section .sec-title strong,
.detail-light .sec-title strong { color: var(--teal-dark) !important; font-weight: 900 !important; }

/* Detail hero title — stronger */
.detail-hero-title {
  font-weight: 300 !important;
  color: #F4F4F2 !important;
}
.detail-hero-title strong { font-weight: 900 !important; }

/* Product/Science section titles */
.product-title { font-weight: 300 !important; font-size: clamp(36px, 3.2vw, 52px) !important; color: #F4F4F2; letter-spacing: -0.02em; }
.product-name { font-weight: 600 !important; font-size: clamp(18px, 1.5vw, 24px); color: #F4F4F2; }
.sci-num { font-weight: 400 !important; font-size: clamp(48px, 4vw, 72px); color: #F4F4F2; }
.detail-light .product-title, .detail-light .product-name { color: #1A1A18; }
.detail-light .sci-num { color: #1A1A18; }

/* Body text — higher contrast + readable size */
.detail-section .sec-sub {
  font-size: clamp(14px, 1.1vw, 16px) !important;
  font-weight: 400;
  color: rgba(244,244,242,0.7) !important;
  line-height: 1.95;
}
.detail-light .detail-section .sec-sub,
.detail-light .sec-sub { color: rgba(26,26,24,0.7) !important; }

/* Tech feature titles bolder */
.tech-feat-title { font-weight: 700 !important; font-size: clamp(12px, 0.85vw, 14px) !important; }
.detail-light .tech-feat-title { color: #1A1A18 !important; }

/* Product/Science body text — readable size + contrast */
.product-body, .sci-desc, .cat-desc, .step-desc, .pd-body {
  font-size: clamp(13px, 1vw, 15px) !important;
  font-weight: 400 !important;
  line-height: 1.95;
  color: rgba(244,244,242,0.7) !important;
}
.detail-light .product-body,
.detail-light .sci-desc,
.detail-light .cat-desc { color: rgba(26,26,24,0.7) !important; }

/* Product role tag */
.product-role { color: rgba(244,244,242,0.5) !important; }
.detail-light .product-role { color: rgba(26,26,24,0.5) !important; }

/* Detail hero subtitle */
.detail-hero-sub {
  color: rgba(244,244,242,0.6) !important;
  font-size: var(--fs-body-lg) !important;
  font-weight: 400 !important;
}

/* ═══ FAQ Readability Overhaul ═══ */

/* Category title — teal colored, large, bold */
.accordion-trigger span {
  font-family: var(--display) !important;
  font-size: clamp(16px, 1.3vw, 20px) !important;
  font-weight: 700 !important;
  letter-spacing: 0.02em !important;
  color: var(--teal) !important;
}
.detail-light .accordion-trigger span { color: var(--teal-dark) !important; }

/* Category number tag */
.faq-category-tag {
  font-size: clamp(9px, 0.7vw, 11px) !important;
  margin-bottom: 20px !important;
}

/* Question text — bold, clearly distinct from answer */
.faq-item summary {
  font-family: var(--ko) !important;
  font-size: clamp(14px, 1.1vw, 16px) !important;
  font-weight: 600 !important;
  color: #F4F4F2 !important;
  line-height: 1.7 !important;
  padding: 20px 2px !important;
}
.detail-light .faq-item summary { color: #1A1A18 !important; }

/* Answer text — indented, lighter, smaller — clearly subordinate */
.faq-answer {
  font-size: clamp(12px, 0.9vw, 14px) !important;
  font-weight: 400 !important;
  color: rgba(244,244,242,0.5) !important;
  line-height: 2.05 !important;
  padding: 4px 2px 28px 20px !important;
  max-width: 780px !important;
  word-break: keep-all !important;
  overflow-wrap: break-word !important;
  white-space: normal !important;
  border-left: 2px solid rgba(0,151,169,0.15) !important;
  margin-left: 2px !important;
}
.detail-light .faq-answer {
  color: rgba(26,26,24,0.55) !important;
  border-left-color: rgba(0,151,169,0.2) !important;
}
.faq-answer strong { font-weight: 600 !important; color: rgba(244,244,242,0.75) !important; }
.detail-light .faq-answer strong { color: rgba(26,26,24,0.8) !important; }
.faq-answer .faq-highlight { color: var(--teal) !important; font-weight: 500 !important; }
.faq-answer br { display: block; content: ''; margin-top: 0; }

/* Core statement box */
.core-statement { color: rgba(244,244,242,0.65) !important; }
.detail-light .core-statement { color: rgba(26,26,24,0.65) !important; }

/* ═══ FIX 2: Nav Hover — Teal Underline ═══ */

/* All top-level nav links get underline pseudo-element */
.nav-links > a,
.nav-links > .nav-dropdown > a {
  position: relative;
}
.nav-links > a::after,
.nav-links > .nav-dropdown > a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1.5px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

/* Hover → show underline */
.nav-links > a:hover::after,
.nav-links > .nav-dropdown:hover > a::after {
  transform: scaleX(1);
}

/* [O] home link — no underline */
.nav-links > a.nav-home::after { display: none; }

/* Dropdown sub-menu items — NO underline pseudo */
.nav-dropdown-menu a::after { display: none !important; }

/* Light mode nav hover: teal text + teal underline */
nav.nav-light .nav-links > a:hover { color: var(--teal) !important; font-weight: 700; }
nav.nav-light .nav-links > a:hover::after,
nav.nav-light .nav-links > .nav-dropdown:hover > a::after { background: var(--teal); }

/* ═══ FIX 3: SEM Image Hover Animation ═══ */
.sem-image-wrap {
  position: relative;
  overflow: hidden;
  border: 0.5px solid rgba(26,26,24,0.08);
}
.sem-image-wrap img {
  width: 100%;
  display: block;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), filter 0.6s ease;
}
.sem-image-wrap:hover img {
  transform: scale(1.08);
  filter: contrast(1.05) brightness(1.02);
}
.sem-image-wrap .sem-badge {
  position: absolute;
  top: 10px; right: 12px;
  font-family: var(--display);
  font-size: 11px; font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 4px rgba(0,0,0,0.5);
  transition: transform 0.4s ease, opacity 0.3s;
}
.sem-image-wrap:hover .sem-badge {
  transform: translateY(-2px);
}
/* Overlay reveal on hover */
.sem-image-wrap::after {
  content: 'View Detail';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 12px;
  background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
  font-family: var(--display);
  font-size: 8px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 500;
  color: rgba(255,255,255,0);
  text-align: center;
  transition: color 0.4s ease;
}
.sem-image-wrap:hover::after {
  color: rgba(255,255,255,0.7);
}

/* ============================================================
   4K+ OPTIMIZATION (3000px+)
   Override :root token caps so content scales past 1440p limits.
   Also bumps nav, logo, body max-widths, and signal rows for
   readability on 27"–32" 4K monitors.
   ============================================================ */
@media (min-width: 3000px) {
  :root {
    --slide-pad-y:    clamp(80px, 7vh, 200px);
    --slide-pad-x:    clamp(64px, 5vw, 220px);
    --slide-gap-lg:   clamp(40px, 3.2vh, 88px);
    --slide-gap-md:   clamp(24px, 2.2vh, 48px);
    --slide-gap-sm:   clamp(12px, 1.1vh, 22px);

    --fs-hero:        clamp(120px, 10vh, 260px);
    --fs-h1:          clamp(88px, 7.5vh, 192px);
    --fs-h2:          clamp(56px, 5.8vh, 132px);
    --fs-h3:          clamp(36px, 3.8vh, 72px);
    --fs-body-lg:     clamp(22px, 1.9vh, 36px);
    --fs-body:        clamp(18px, 1.55vh, 28px);
    --fs-sm:          clamp(15px, 1.25vh, 22px);
    --fs-tag:         clamp(13px, 1.05vh, 19px);
  }

  /* NAV */
  nav { height: clamp(96px, 6vh, 140px) !important; padding: 0 clamp(64px, 4vw, 180px); }
  .nav-logo img { height: clamp(32px, 2.4vh, 52px) !important; width: auto !important; }
  .nav-home { font-size: clamp(24px, 1.8vh, 38px) !important; }
  .nav-links { gap: clamp(56px, 3.5vw, 120px) !important; }
  .nav-links a { font-size: clamp(16px, 1.2vh, 24px) !important; letter-spacing: 0.16em; }

  /* SIDE DOT NAV */
  .dp-nav { right: clamp(32px, 2.2vw, 72px); gap: clamp(20px, 1.4vh, 36px); }
  .dp-nav-dot { width: clamp(10px, 0.7vh, 16px); height: clamp(10px, 0.7vh, 16px); }
  .dp-nav-dot span { font-size: clamp(12px, 0.9vh, 18px); }

  /* BODY / SUBHEAD MAX-WIDTHS — no more 560px cramming */
  .detail-hero-sub { max-width: min(1100px, 62vw) !important; }
  .sec-sub { max-width: min(1040px, 58vw) !important; }
  .gs-body { max-width: min(1100px, 62vw) !important; }

  /* SIGNAL ROW (home hero stats under sphere) */
  .signal-num { font-size: clamp(56px, 4.2vh, 96px) !important; }
  .signal-label { font-size: clamp(12px, 0.95vh, 18px) !important; letter-spacing: 0.24em; }
  .signal-sub { font-size: clamp(13px, 1.1vh, 20px) !important; }

  /* HOME HERO inner — widen so title can breathe */
  .hero-inner { max-width: min(1800px, 80vw); padding: clamp(80px, 8vh, 160px) clamp(64px, 5vw, 160px) clamp(60px, 6vh, 120px); }

  /* STAT CARDS */
  .gs-stat { padding: clamp(32px, 3vh, 64px) clamp(36px, 3.2vw, 72px); min-width: 180px; }
  .gs-stats--row { gap: clamp(12px, 1vh, 24px) !important; margin-bottom: clamp(32px, 3vh, 64px) !important; }
  .gs-stats--row .gs-stat { flex: 1; max-width: clamp(180px, 14vw, 280px) !important; }
  .gs-stat-num { font-size: clamp(52px, 4.2vh, 96px) !important; }
  .gs-stat-label { font-size: clamp(14px, 1.15vh, 22px) !important; letter-spacing: 0.18em; }

  /* CTAs — bigger on 4K */
  .gs-cta, .hero-cta { font-size: clamp(15px, 1.2vh, 24px) !important; letter-spacing: 0.22em !important; padding-bottom: 8px !important; }

  /* Scene content wrappers — widen on 4K */
  .science-center-content { max-width: min(1600px, 72vw) !important; padding: 0 clamp(48px, 4vw, 120px) !important; }
  .fulltype-content { max-width: min(1800px, 78vw) !important; padding: 0 clamp(48px, 4vw, 120px) !important; }
  .scene-content--center { max-width: min(1600px, 72vw) !important; padding: clamp(80px, 8vh, 160px) clamp(48px, 4vw, 120px) !important; }
  .scene-content--left, .scene-content--right { width: 48% !important; padding-left: clamp(72px, 6vw, 180px) !important; padding-right: clamp(40px, 3vw, 100px) !important; }

  /* CONTAINER WIDTHS */
  .container { max-width: min(2800px, 78vw); padding: 0 clamp(48px, 4vw, 140px); }
  .dp-slide-scroll { max-width: min(2800px, 82vw) !important; }

  /* CATEGORY / GRID CARDS */
  .cat-grid { gap: clamp(4px, 0.4vh, 8px); margin-top: clamp(24px, 2.4vh, 48px); }
  .cat-card { padding: clamp(32px, 3vh, 64px) clamp(36px, 2.8vw, 72px); }
  .cat-num { font-size: clamp(12px, 0.95vh, 18px); letter-spacing: 0.22em; margin-bottom: clamp(12px, 1vh, 20px); }
  .cat-title { font-size: clamp(24px, 2.2vh, 42px) !important; margin-bottom: clamp(8px, 0.8vh, 16px); }
  .cat-desc { font-size: clamp(14px, 1.2vh, 22px) !important; line-height: 1.9; }

  /* PRODUCT SPECS TABLE */
  .product-specs-table td { font-size: clamp(14px, 1.15vh, 22px); padding: clamp(10px, 1vh, 18px) 0; }
  .product-quote { font-size: clamp(16px, 1.4vh, 26px) !important; padding-left: clamp(16px, 1.2vw, 32px) !important; }
  .product-tag { font-size: clamp(12px, 0.95vh, 18px) !important; letter-spacing: 0.22em; margin-bottom: clamp(16px, 1.4vh, 32px) !important; }
  .product-role-tag { font-size: clamp(14px, 1.2vh, 22px) !important; margin-bottom: clamp(32px, 2.8vh, 56px) !important; }
  .product-body { font-size: clamp(16px, 1.35vh, 24px) !important; }

  /* BUTTONS / CTAs */
  .hero-cta, .gs-cta, .nav-cta { font-size: clamp(13px, 1vh, 19px) !important; }
}

/* 5K+ — extra headroom */
@media (min-width: 4100px) {
  :root {
    --fs-hero:        clamp(160px, 11vh, 320px);
    --fs-h1:          clamp(120px, 8.5vh, 240px);
    --fs-h2:          clamp(80px, 6.4vh, 168px);
    --fs-body-lg:     clamp(28px, 2.1vh, 44px);
    --fs-body:        clamp(22px, 1.7vh, 34px);
  }
  .container { max-width: min(3400px, 76vw); }
}