:root {
  --bg: #12141b;
  --bg-2: #171b28;
  --bg-3: #1c2130;
  --border: rgba(255, 255, 255, 0.07);
  --border-mid: rgba(255, 255, 255, 0.12);
  --accent: #4f7ef5;
  --text: #e8ecf5;
  --text-2: rgba(232, 236, 245, 0.62);
  --text-3: rgba(232, 236, 245, 0.3);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t: 0.3s;
  --pad-section: clamp(5rem, 10vw, 8rem);
  --w: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Noto Sans KR", sans-serif;
  font-weight: 300;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  font: inherit;
}

h1,
h2,
h3 {
  font-family: "Cormorant Garamond", "Noto Sans KR", serif;
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.container {
  width: min(90%, var(--w));
  margin-inline: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.78rem 1.6rem;
  border: 1px solid transparent;
  transition: all var(--t) var(--ease);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: #3f6de7;
  border-color: #3f6de7;
}

.btn--outline {
  border-color: var(--border-mid);
  color: var(--text-2);
}

.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--outline-light {
  border-color: rgba(255, 255, 255, 0.35);
  color: rgba(255, 255, 255, 0.84);
}

.btn--outline-light:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  background: rgba(18, 20, 27, 0.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background var(--t) var(--ease), backdrop-filter var(--t) var(--ease), border-bottom var(--t) var(--ease);
}

.site-header.is-scrolled {
  background: rgba(18, 20, 27, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.26rem 5%;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  position: relative;
}

.logo-img {
  width: 92px;
  height: 92px;
  margin-block: -14px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.26rem;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.site-nav {
  display: flex;
  gap: 2.6rem;
}

.site-nav a {
  position: relative;
  padding-bottom: 2px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: 0.04em;
  transition: color var(--t) var(--ease);
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--t) var(--ease);
}

.site-nav a:hover {
  color: var(--text);
}

.site-nav a:hover::after {
  width: 100%;
}

.site-nav a.is-active {
  color: var(--text);
}

.site-nav a.is-active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--text);
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  background: rgba(7, 8, 15, 0.97);
  border-top: 1px solid var(--border);
  padding: 0.5rem 5% 1.5rem;
}

.mobile-nav a {
  padding: 1rem 0;
  font-size: 1rem;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-nav a.is-active {
  color: var(--text);
}

.site-header.is-open .mobile-nav {
  display: flex;
}

.site-header.is-open .nav-toggle span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.site-header.is-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

.site-header.is-open .nav-toggle span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

.hero {
  position: relative;
  height: 100svh;
  min-height: 620px;
  overflow: hidden;
}

.hero-slides,
.hero-slide {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding-bottom: 14vh;
  opacity: 0;
  transition: opacity 1.4s var(--ease);
  pointer-events: none;
}

.hero-slide.is-active {
  opacity: 1;
  pointer-events: auto;
}

.slide-bg {
  position: absolute;
  inset: -4%;
  transition: transform 9s var(--ease);
  transform: scale(1.06);
}

.hero-slide.is-active .slide-bg {
  transform: scale(1);
}

.slide-bg--1 {
  background:
    radial-gradient(ellipse 80% 60% at 25% 65%, rgba(12, 35, 100, 0.9) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 25%, rgba(5, 18, 55, 0.7) 0%, transparent 50%),
    linear-gradient(165deg, #050710 0%, #091230 45%, #060b22 100%);
}

.slide-bg--2 {
  background:
    radial-gradient(ellipse 70% 55% at 70% 55%, rgba(4, 45, 30, 0.9) 0%, transparent 55%),
    radial-gradient(ellipse 45% 40% at 20% 75%, rgba(0, 25, 18, 0.6) 0%, transparent 45%),
    linear-gradient(155deg, #050710 0%, #061a0f 45%, #050e08 100%);
}

.slide-bg--3 {
  background:
    radial-gradient(ellipse 65% 55% at 50% 45%, rgba(35, 8, 70, 0.95) 0%, transparent 55%),
    radial-gradient(ellipse 40% 50% at 15% 80%, rgba(55, 4, 90, 0.55) 0%, transparent 45%),
    linear-gradient(165deg, #050710 0%, #110520 45%, #0a0415 100%);
}

.slide-bg--4 {
  background:
    radial-gradient(ellipse 70% 55% at 35% 60%, rgba(55, 28, 4, 0.9) 0%, transparent 55%),
    radial-gradient(ellipse 45% 45% at 75% 30%, rgba(38, 18, 0, 0.6) 0%, transparent 45%),
    linear-gradient(160deg, #050710 0%, #160e05 45%, #0e0904 100%);
}

.slide-grain {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.72' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
  background-size: 200px;
}

.slide-media {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.slide-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(18, 20, 27, 0.4) 0%, rgba(18, 20, 27, 0.2) 28%, rgba(18, 20, 27, 0.08) 52%, rgba(18, 20, 27, 0.34) 100%),
    linear-gradient(180deg, rgba(18, 20, 27, 0.04) 0%, rgba(18, 20, 27, 0.01) 26%, rgba(18, 20, 27, 0.18) 100%);
}

.slide-media-frame {
  position: absolute;
  inset: 0;
  border: 0;
  background: transparent;
}

.slide-pdf {
  min-height: 100%;
}

.slide-pdf canvas {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center center;
  filter: saturate(1.02) contrast(1.04) brightness(1.08);
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 35%;
  background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
  z-index: 2;
}

.slide-content {
  position: relative;
  z-index: 3;
  width: min(90%, 1200px);
  margin-inline: auto;
}

.slide-eyebrow,
.section-label {
  margin-bottom: 1rem;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.68);
}

.slide-headline {
  max-width: none;
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  font-weight: 400;
  line-height: 1.04;
  color: #efe3b8;
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.34), 0 2px 10px rgba(0, 0, 0, 0.28);
}

.slide-headline span {
  display: block;
  white-space: nowrap;
}

.slide-sub {
  max-width: 34ch;
  margin-top: 1rem;
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.45;
  color: rgba(235, 165, 123, 0.72);
  text-wrap: balance;
}

.slide-cta {
  margin-top: 1.7rem;
}

.hero-ui {
  position: absolute;
  left: 5%;
  right: 5%;
  bottom: 3.4rem;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.slide-counter {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.74);
}

.slide-sep {
  width: 38px;
  height: 1px;
  background: rgba(255, 255, 255, 0.28);
}

.slide-progress-track {
  flex: 1;
  max-width: 360px;
  height: 1px;
  background: rgba(255, 255, 255, 0.18);
  overflow: hidden;
}

.slide-progress-bar {
  width: 0;
  height: 100%;
  background: #fff;
}

.slide-nav-btns {
  display: flex;
  gap: 0.7rem;
}

.slide-btn {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.78);
  transition: all var(--t) var(--ease);
}

.slide-btn:hover {
  border-color: rgba(255, 255, 255, 0.52);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.section {
  padding: var(--pad-section) 0;
}

.detail-main {
  padding-top: 110px;
}

.detail-shell {
  display: grid;
  gap: 2rem;
}

.detail-intro,
.detail-content-block {
  padding: 2rem;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(14px);
}

.detail-intro .section-label,
.detail-content-block .section-label {
  margin-bottom: 1.2rem;
}

.detail-content-block .section-intro {
  margin-bottom: 1.6rem;
}

.section--vision,
.section--insights {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

.section--specs,
.section--document {
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-3) 100%);
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-header h2,
.vision-copy h2 {
  font-size: clamp(2.6rem, 5vw, 4.7rem);
}

.section-description,
.vision-copy p,
.spec-card p,
.document-copy p,
.insight-card p {
  color: var(--text-2);
}

.detail-intro .manifesto-copy h2 {
  margin-bottom: 1.2rem;
}

.section-description,
.vision-copy p {
  max-width: 64ch;
  margin-top: 1rem;
}

.vision-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 3rem;
  align-items: start;
}

.vision-copy .btn {
  margin-top: 1.8rem;
}

.vision-stats,
.document-feature,
.spec-card,
.page-card,
.insight-card {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(14px);
}

.vision-stats {
  padding: 1.4rem;
}

.stat-item + .stat-item {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.stat-label,
.document-kicker,
.page-card-head span,
.insight-card span {
  display: block;
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}

.stat-value {
  display: block;
  margin-top: 0.5rem;
  font-size: 2.4rem;
  font-weight: 400;
}

.stat-value em {
  margin-left: 0.2rem;
  font-size: 0.95rem;
  font-style: normal;
  color: var(--text-2);
}

.stat-note {
  display: block;
  margin-top: 0.35rem;
  color: var(--text-2);
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
}

.spec-card {
  min-height: 210px;
  padding: 1.6rem;
}

.spec-card h3 {
  font-size: 2rem;
}

.spec-card p,
.document-copy p,
.insight-card p {
  margin-top: 0.9rem;
}

.document-hero {
  margin-bottom: 2rem;
}

.document-feature {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 2rem;
  padding: 1.6rem;
}

.document-copy h3 {
  margin-top: 0.75rem;
  font-size: 2.6rem;
}

.document-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.document-stage-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1rem;
}

.document-frame.large {
  grid-row: span 2;
  min-height: 640px;
}

.document-frame.small {
  min-height: 310px;
}

.pdf-canvas-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.03);
}

.pdf-canvas-wrap.is-loading::before {
  content: "Rendering page...";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
}

.page-grid,
.insight-grid {
  display: grid;
  gap: 1.2rem;
}

.page-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.page-card {
  padding: 0.9rem;
}

.page-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

.page-card-head strong {
  font-size: 0.95rem;
  font-weight: 500;
}

.document-pdf {
  min-height: 360px;
}

.insight-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.insight-card {
  display: block;
  padding: 1.6rem;
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease);
}

.insight-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-mid);
}

.insight-card strong {
  display: block;
  margin-top: 0.8rem;
  font-size: 1.5rem;
  font-weight: 400;
}

.site-footer {
  background: #101319;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 0;
  color: var(--text-2);
}

.reveal-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.06s;
}

.delay-2 {
  transition-delay: 0.12s;
}

.delay-3 {
  transition-delay: 0.18s;
}

.delay-4 {
  transition-delay: 0.24s;
}

@media (max-width: 1080px) {
  .vision-grid,
  .document-feature,
  .insight-grid,
  .specs-grid {
    grid-template-columns: 1fr;
  }

  .page-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .document-stage-grid {
    grid-template-columns: 1fr 1fr;
  }

  .document-frame.large {
    grid-row: auto;
    min-height: 420px;
  }
}

@media (max-width: 760px) {
  .header-inner {
    padding: 0.9rem 5%;
    gap: 1rem;
  }

  .logo {
    gap: 0.55rem;
  }

  .logo-img {
    width: 56px;
    height: 56px;
    margin-block: -6px;
  }

  .logo-text {
    font-size: 0.92rem;
    letter-spacing: 0.12em;
  }

  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    min-height: 100svh;
    height: 100svh;
  }

  .slide-media {
    inset: 0 0 34% 0;
  }

  .slide-media::after {
    background:
      linear-gradient(180deg, rgba(18, 20, 27, 0.08) 0%, rgba(18, 20, 27, 0.04) 48%, rgba(18, 20, 27, 0.42) 100%),
      linear-gradient(180deg, rgba(18, 20, 27, 0) 52%, rgba(18, 20, 27, 0.92) 100%);
  }

  .slide-media-frame,
  .slide-pdf,
  .slide-pdf canvas {
    height: 100%;
  }

  .slide-pdf canvas {
    object-fit: cover;
    object-position: center top;
  }

  .hero-slide {
    align-items: flex-end;
    padding-top: 5.7rem;
    padding-bottom: 8.5rem;
  }

  .slide-headline {
    font-size: clamp(1.9rem, 9.2vw, 3.1rem);
    line-height: 1.02;
  }

  .slide-headline span {
    white-space: normal;
  }

  .slide-content {
    width: min(90%, 32rem);
  }

  .slide-eyebrow {
    margin-bottom: 0.7rem;
    font-size: 0.62rem;
    letter-spacing: 0.12em;
  }

  .slide-sub {
    max-width: 26ch;
    margin-top: 0.75rem;
    font-size: 0.95rem;
    line-height: 1.55;
  }

  .slide-cta {
    margin-top: 1.1rem;
  }

  .slide-cta .btn {
    padding: 0.72rem 1.15rem;
    font-size: 0.64rem;
  }

  .hero-ui {
    bottom: 2.6rem;
    flex-wrap: nowrap;
    gap: 0.8rem;
    align-items: center;
  }

  .slide-progress-track {
    max-width: none;
    width: auto;
    min-width: 0;
    flex: 1;
  }

  .slide-counter {
    font-size: 0.72rem;
    flex-shrink: 0;
  }

  .slide-nav-btns {
    flex-shrink: 0;
  }

  .slide-btn {
    width: 38px;
    height: 38px;
  }

  .page-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .detail-intro,
  .detail-content-block {
    padding: 1.3rem;
  }
}

@media (min-width: 761px) {
  .site-nav {
    display: flex;
  }

  .nav-toggle,
  .mobile-nav {
    display: none !important;
  }

  .header-inner {
    padding: 1.26rem 5%;
    gap: 2rem;
  }

  .logo {
    gap: 0.7rem;
  }

  .logo-img {
    width: 92px;
    height: 92px;
    margin-block: -14px;
  }

  .logo-text {
    font-size: 1.26rem;
    letter-spacing: 0.16em;
  }

  .hero {
    height: 100svh;
    min-height: 620px;
  }

  .slide-media {
    inset: 0;
  }

  .hero-slide {
    align-items: flex-end;
    padding-top: 0;
    padding-bottom: 14vh;
  }

  .slide-content {
    width: min(90%, 1200px);
  }

  .slide-headline {
    font-size: clamp(2.6rem, 5vw, 4.8rem);
    line-height: 1.04;
  }

  .slide-eyebrow {
    margin-bottom: 1rem;
    font-size: 0.72rem;
    letter-spacing: 0.14em;
  }

  .slide-sub {
    max-width: 34ch;
    margin-top: 1rem;
    font-size: 1.5rem;
    line-height: 1.45;
  }

  .slide-cta {
    margin-top: 1.7rem;
  }

  .hero-ui {
    bottom: 3.4rem;
    flex-wrap: nowrap;
    gap: 1rem;
    align-items: center;
  }

  .slide-progress-track {
    width: auto;
    max-width: 360px;
    min-width: 0;
    flex: 1;
  }

  .slide-counter {
    font-size: 0.78rem;
  }

  .slide-btn {
    width: 42px;
    height: 42px;
  }
}