:root {
  --navy: #061222;
  --navy-2: #0a1b33;
  --navy-3: #102845;
  --gold: #c8a45d;
  --gold-soft: #e7d09a;
  --cream: #f4efe4;
  --text: #f9f5ec;
  --muted: #b8c2cf;
  --muted-2: #8996a7;
  --line: rgba(200, 164, 93, 0.26);
  --line-soft: rgba(244, 239, 228, 0.10);
  --panel: rgba(255, 255, 255, 0.045);
  --panel-strong: rgba(255, 255, 255, 0.075);
  --shadow: 0 32px 90px rgba(0, 0, 0, 0.32);
  --radius: 28px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  font-family: "Times New Roman", Georgia, "Apple SD Gothic Neo", "Noto Serif KR", serif;
  line-height: 1.65;
  background:
    radial-gradient(circle at 12% 8%, rgba(200, 164, 93, 0.16), transparent 28%),
    radial-gradient(circle at 78% 18%, rgba(255, 255, 255, 0.055), transparent 30%),
    linear-gradient(135deg, #061222 0%, #07182d 48%, #020813 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.42;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.026) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 82%);
}

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

p,
h1,
h2,
h3,
dl,
dd {
  margin-top: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px clamp(20px, 5vw, 76px);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(6, 18, 34, 0.76);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
  letter-spacing: 0.04em;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--gold);
  border-radius: 999px;
  color: var(--gold-soft);
  font-weight: 700;
  box-shadow: inset 0 0 0 1px rgba(231, 208, 154, 0.08);
}

.brand-name {
  font-size: 1.08rem;
  font-weight: 700;
}

.nav {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.nav a {
  transition: color 180ms ease;
}

.nav a:hover {
  color: var(--gold-soft);
}

.hero {
  display: grid;
  min-height: calc(100vh - 79px);
  grid-template-columns: minmax(0, 1.06fr) minmax(340px, 0.94fr);
  align-items: center;
  gap: clamp(36px, 7vw, 112px);
  padding: clamp(74px, 9vw, 132px) clamp(20px, 6vw, 96px);
}

.eyebrow,
.section-label,
.panel-kicker {
  margin-bottom: 18px;
  color: var(--gold-soft);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin-bottom: 20px;
  font-size: clamp(4.4rem, 11vw, 10.5rem);
  font-weight: 400;
  line-height: 0.86;
  letter-spacing: -0.085em;
}

.hero-line {
  max-width: 880px;
  margin-bottom: 8px;
  color: var(--gold-soft);
  font-size: clamp(1.3rem, 2.6vw, 2.45rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.hero-line.ko {
  margin-bottom: 30px;
  color: var(--cream);
  font-size: clamp(1.05rem, 1.65vw, 1.45rem);
  font-weight: 600;
  letter-spacing: -0.03em;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.35vw, 1.2rem);
}

.ko {
  color: #edf1f3;
  word-break: keep-all;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid var(--gold);
  border-radius: 999px;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.button.primary {
  color: #061222;
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
}

.button.secondary {
  color: var(--gold-soft);
  background: rgba(255, 255, 255, 0.02);
}

.hero-panel {
  position: relative;
  min-height: 620px;
  overflow: hidden;
  display: grid;
  place-items: end start;
  padding: clamp(30px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.025)),
    rgba(255,255,255,0.035);
  box-shadow: var(--shadow);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 22px;
  border: 1px solid rgba(200, 164, 93, 0.13);
  border-radius: calc(var(--radius) - 8px);
}

.instrument-silhouette {
  position: absolute;
  inset: 58px 54px 86px;
  border: 1px solid rgba(200, 164, 93, 0.32);
  border-radius: 46% 54% 50% 50% / 58% 58% 42% 42%;
  opacity: 0.9;
}

.instrument-silhouette::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -74px;
  width: 58px;
  height: 118px;
  transform: translateX(-50%);
  border: 1px solid rgba(200, 164, 93, 0.28);
  border-radius: 999px 999px 22px 22px;
}

.instrument-silhouette::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 42%;
  width: 56%;
  height: 1px;
  transform: translateX(-50%);
  background: rgba(200, 164, 93, 0.32);
}

.string-line {
  position: absolute;
  top: -80px;
  bottom: -78px;
  width: 1px;
  background: rgba(231, 208, 154, 0.25);
}

.line-1 { left: calc(50% - 15px); }
.line-2 { left: calc(50% - 5px); }
.line-3 { left: calc(50% + 5px); }
.line-4 { left: calc(50% + 15px); }

.panel-content {
  position: relative;
  z-index: 1;
  width: 100%;
}

.panel-content h2 {
  margin-bottom: 18px;
  font-size: clamp(2.7rem, 5vw, 5.3rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.065em;
}

.panel-content p {
  max-width: 430px;
  color: var(--muted);
}

.signal-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: 30px 0 0;
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}

.signal-list div {
  padding: 16px;
  background: rgba(6, 18, 34, 0.58);
}

.signal-list dt {
  color: var(--gold-soft);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.signal-list dd {
  margin-bottom: 0;
  color: var(--cream);
  font-size: 1.08rem;
}

.section {
  position: relative;
  padding: clamp(82px, 9vw, 140px) clamp(20px, 6vw, 96px);
  border-top: 1px solid var(--line-soft);
}

.statement-section {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01));
}

.statement {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(34px, 6vw, 94px);
  align-items: start;
}

.statement h2,
.section-head h2,
.split h2,
.principle-card h2,
.contact-section h2 {
  margin-bottom: 0;
  font-size: clamp(2.55rem, 6vw, 6.2rem);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.07em;
}

.statement p {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(1.06rem, 1.5vw, 1.3rem);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(34px, 6vw, 94px);
  margin-bottom: 42px;
  align-items: end;
}

.section-head > p:last-child {
  max-width: 620px;
  color: var(--muted);
  font-size: 1.1rem;
}

.section-head.compact {
  display: block;
  max-width: 960px;
}

.why-section,
.standard-section,
.research-section {
  background: rgba(255,255,255,0.028);
}

.why-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.875fr 0.875fr;
  gap: 16px;
}

.why-card,
.standard-card,
.architecture article {
  min-height: 260px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    linear-gradient(150deg, rgba(255,255,255,0.065), rgba(255,255,255,0.018)),
    rgba(255,255,255,0.026);
}

.why-card.large {
  min-height: 330px;
}

.why-card h3 {
  margin-bottom: 18px;
  color: var(--cream);
  font-size: clamp(1.65rem, 2.5vw, 2.6rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.why-card:not(.large) h3 {
  color: var(--gold-soft);
  font-size: 1.65rem;
}

.why-card p,
.standard-card p,
.architecture p {
  color: var(--muted);
}

.transition-line {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--line);
}

.transition-line div {
  padding: 24px;
  background: rgba(6, 18, 34, 0.62);
}

.transition-line span {
  display: block;
  margin-bottom: 8px;
  color: var(--gold-soft);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.transition-line strong {
  color: var(--cream);
  font-weight: 500;
}

.standard-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.card-number {
  display: block;
  margin-bottom: 58px;
  color: rgba(231, 208, 154, 0.62);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.standard-card h3,
.architecture h3 {
  margin-bottom: 12px;
  color: var(--gold-soft);
  font-size: 1.65rem;
  font-weight: 400;
}

.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(34px, 6vw, 94px);
  align-items: start;
}

.section-body {
  max-width: 780px;
  color: var(--muted);
  font-size: 1.06rem;
}

.report-stack {
  display: grid;
  gap: 10px;
  margin-top: 34px;
}

.report-stack div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  align-items: center;
  padding: 17px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.042);
}

.report-stack span {
  color: var(--gold-soft);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.report-stack strong {
  color: var(--cream);
  font-weight: 500;
}

.architecture {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 42px;
}

.principle-section {
  padding-top: clamp(52px, 7vw, 108px);
  padding-bottom: clamp(52px, 7vw, 108px);
}

.principle-card {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(30px, 5vw, 68px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 15% 18%, rgba(200,164,93,0.12), transparent 28%),
    linear-gradient(150deg, rgba(255,255,255,0.08), rgba(255,255,255,0.025));
  box-shadow: var(--shadow);
}

.principle-card h2 {
  margin-bottom: 28px;
}

.principle-card p {
  max-width: 880px;
  color: var(--muted);
  font-size: 1.08rem;
}

.contact-section {
  text-align: center;
}

.contact-section .section-label {
  margin-left: auto;
  margin-right: auto;
}

.contact-section h2 {
  margin-bottom: 28px;
}

.contact-section p {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 30px;
  color: var(--muted);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 34px clamp(20px, 6vw, 96px);
  border-top: 1px solid var(--line-soft);
  color: var(--muted-2);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
}

@media (max-width: 1060px) {
  .nav {
    display: none;
  }

  .hero,
  .statement,
  .section-head,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    min-height: 520px;
  }

  .why-grid,
  .standard-grid,
  .architecture,
  .transition-line {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .why-card.large {
    grid-column: 1 / -1;
  }

  .section-head h2 {
    max-width: 860px;
  }
}

@media (max-width: 660px) {
  .site-header {
    padding: 16px 20px;
  }

  .hero {
    min-height: auto;
    padding-top: 58px;
  }

  h1 {
    font-size: clamp(4rem, 20vw, 6.5rem);
  }

  .hero-panel {
    min-height: 460px;
    padding: 26px;
  }

  .instrument-silhouette {
    inset: 48px 36px 78px;
  }

  .why-grid,
  .standard-grid,
  .architecture,
  .transition-line {
    grid-template-columns: 1fr;
  }

  .why-card,
  .standard-card,
  .architecture article {
    min-height: auto;
  }

  .card-number {
    margin-bottom: 36px;
  }

  .report-stack div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer {
    flex-direction: column;
  }
}