@font-face {
  font-family: "Bricolage";
  src: url("assets/fonts/BricolageGrotesque-Bold.ttf") format("truetype");
  font-display: swap;
}

@font-face {
  font-family: "Instrument Sans";
  src: url("assets/fonts/InstrumentSans-Regular.ttf") format("truetype");
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("assets/fonts/IBMPlexMono-Regular.ttf") format("truetype");
  font-display: swap;
}

@font-face {
  font-family: "Young Serif";
  src: url("assets/fonts/YoungSerif-Regular.ttf") format("truetype");
  font-display: swap;
}

:root {
  --bg: #09161f;
  --bg-2: #102737;
  --surface: rgba(237, 234, 226, 0.08);
  --surface-strong: rgba(237, 234, 226, 0.12);
  --card: rgba(7, 20, 29, 0.72);
  --card-strong: rgba(8, 22, 30, 0.88);
  --ink: #eef0eb;
  --muted: #b5c0bf;
  --line: rgba(223, 234, 231, 0.16);
  --accent: #d37f5d;
  --accent-strong: #e5a37d;
  --seafoam: #a9d0c2;
  --sand: #d3c39b;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
  --max-width: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: "Instrument Sans", sans-serif;
  background:
    radial-gradient(circle at 12% 10%, rgba(211, 127, 93, 0.22), transparent 28%),
    radial-gradient(circle at 84% 18%, rgba(169, 208, 194, 0.16), transparent 24%),
    linear-gradient(180deg, #102536 0%, #0a1b26 42%, #08131a 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

body::before {
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 74px 74px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.22), transparent 78%);
}

body::after {
  background:
    radial-gradient(circle at 20% 18%, rgba(255, 255, 255, 0.12) 0 1px, transparent 1px),
    radial-gradient(circle at 78% 22%, rgba(255, 255, 255, 0.14) 0 1.5px, transparent 1.5px),
    radial-gradient(circle at 68% 74%, rgba(169, 208, 194, 0.18) 0 1px, transparent 1px),
    radial-gradient(circle at 12% 72%, rgba(211, 127, 93, 0.18) 0 1.5px, transparent 1.5px);
}

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

a {
  color: inherit;
}

a,
button,
summary {
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    opacity 180ms ease;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 20;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  background: #fff;
  color: #000;
}

.skip-link:focus {
  top: 1rem;
}

.page-shell {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding-bottom: 4rem;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0 0.75rem;
  backdrop-filter: blur(0);
}

.topbar.is-scrolled {
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: min(13rem, 48vw);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem;
}

.nav a {
  padding: 0.7rem 0.95rem;
  border: 1px solid rgba(238, 240, 235, 0.08);
  border-radius: 999px;
  background: rgba(9, 22, 31, 0.54);
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover {
  color: var(--ink);
  border-color: rgba(169, 208, 194, 0.34);
}

.hero,
.overview-grid,
.timeline-grid,
.context-grid,
.sources-grid {
  display: grid;
  gap: 1.3rem;
}

.hero {
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: stretch;
  margin-top: 1.3rem;
}

.section {
  margin-top: 4.6rem;
}

.hero-copy,
.hero-panel,
.info-card,
.timeline-card,
.context-card,
.faq-list details,
.source-card,
.footer {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(8, 20, 29, 0.92), rgba(7, 18, 26, 0.86));
  box-shadow: var(--shadow);
}

.hero-copy,
.hero-panel {
  position: relative;
  overflow: hidden;
  border-radius: 2rem;
  padding: 2.2rem;
}

.hero-copy::before,
.hero-panel::before {
  content: "";
  position: absolute;
  inset: auto auto -18% -12%;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(211, 127, 93, 0.18), transparent 72%);
  pointer-events: none;
}

.hero-panel::before {
  inset: -16% -10% auto auto;
  background: radial-gradient(circle, rgba(169, 208, 194, 0.14), transparent 70%);
}

.eyebrow,
.card-kicker,
.timeline-date,
.source-label,
.footer-meta {
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--accent-strong);
  font-size: 0.76rem;
}

h1,
h2,
h3,
summary {
  margin: 0;
  font-family: "Bricolage", sans-serif;
  letter-spacing: -0.03em;
}

h1 {
  max-width: 8ch;
  font-size: clamp(3.6rem, 10vw, 6.8rem);
  line-height: 0.92;
}

h2 {
  max-width: 13ch;
  font-size: clamp(2rem, 4vw, 3.35rem);
  line-height: 0.98;
}

h3 {
  font-size: 1.25rem;
  line-height: 1.08;
}

p {
  margin: 0;
  color: var(--muted);
  line-height: 1.68;
}

.hero-dek,
.section-heading p {
  max-width: 62ch;
}

.hero-dek {
  margin-top: 1.1rem;
  font-size: 1.04rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.6rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  padding: 0.95rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #b96e53 100%);
  color: #f8f0e5;
}

.button-secondary {
  border-color: rgba(238, 240, 235, 0.16);
  background: rgba(255, 255, 255, 0.04);
}

.signal-note {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin-top: 1.35rem;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
  color: #d9dfdc;
}

.signal-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--seafoam);
  box-shadow: 0 0 0 0.35rem rgba(169, 208, 194, 0.13);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 1.8rem 0 0;
}

.stat-card {
  padding: 1rem;
  border-radius: 1.1rem;
  border: 1px solid rgba(223, 234, 231, 0.1);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.025));
}

.stat-card dt {
  color: var(--seafoam);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.stat-card dd {
  margin: 0.55rem 0 0;
  color: var(--ink);
  font-family: "Young Serif", serif;
  font-size: 1rem;
}

.panel-heading {
  display: grid;
  gap: 0.5rem;
}

.hero-panel-title {
  color: var(--ink);
  font-family: "Young Serif", serif;
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  line-height: 1.08;
}

.signal-art {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 19rem;
  margin: 1.4rem 0;
  padding: 1.2rem;
  border-radius: 1.5rem;
  background:
    radial-gradient(circle at 50% 50%, rgba(169, 208, 194, 0.08), transparent 46%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  border: 1px solid rgba(223, 234, 231, 0.08);
}

.signal-art img {
  width: min(100%, 21rem);
  height: auto;
}

.signal-list {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.section-heading {
  display: grid;
  gap: 0.8rem;
}

.section-heading h2 {
  max-width: 14ch;
}

.overview-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.info-card,
.timeline-card,
.context-card,
.source-card {
  border-radius: 1.6rem;
  padding: 1.35rem;
}

.card-kicker,
.timeline-date,
.source-label {
  color: var(--seafoam);
  font-size: 0.72rem;
}

.info-card h3,
.timeline-card h3,
.context-card h3,
.source-card strong,
.faq-list summary {
  margin-top: 0.6rem;
}

.info-card p:last-child,
.timeline-card p:last-child,
.context-card p:last-child,
.source-card span:last-child {
  margin-top: 0.7rem;
}

.timeline-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.timeline-card {
  position: relative;
  min-height: 15.2rem;
}

.timeline-card::after {
  content: "";
  position: absolute;
  left: 1.35rem;
  right: 1.35rem;
  bottom: 1.1rem;
  height: 2px;
  background: linear-gradient(90deg, rgba(169, 208, 194, 0.45), rgba(211, 127, 93, 0.28), transparent 92%);
}

.context-grid {
  grid-template-columns: 1.2fr 1fr 1fr;
  margin-top: 1.5rem;
}

.context-card-feature {
  grid-row: span 2;
  min-height: 100%;
}

.faq-list {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.faq-list details {
  border-radius: 1.35rem;
  padding: 1.15rem 1.2rem;
}

.faq-list summary {
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list details p {
  margin-top: 0.9rem;
}

.sources-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.source-card {
  display: grid;
  gap: 0.25rem;
  text-decoration: none;
}

.source-card:hover {
  transform: translateY(-3px);
  border-color: rgba(169, 208, 194, 0.28);
}

.source-card strong {
  color: var(--ink);
  font-family: "Young Serif", serif;
  font-weight: 400;
  font-size: 1.2rem;
}

.footer {
  display: grid;
  gap: 0.45rem;
  margin-top: 4rem;
  border-radius: 1.5rem;
  padding: 1.5rem;
}

.footer-meta {
  color: var(--seafoam);
  font-size: 0.75rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 520ms ease var(--stagger, 0ms),
    transform 520ms ease var(--stagger, 0ms);
}

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

@media (max-width: 1040px) {
  .hero,
  .overview-grid,
  .timeline-grid,
  .context-grid,
  .sources-grid {
    grid-template-columns: 1fr;
  }

  .context-card-feature {
    grid-row: auto;
  }

  .timeline-card {
    min-height: auto;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(var(--max-width), calc(100% - 1rem));
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.9rem;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero-copy,
  .hero-panel,
  .info-card,
  .timeline-card,
  .context-card,
  .faq-list details,
  .source-card,
  .footer {
    padding: 1.15rem;
    border-radius: 1.25rem;
  }

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

  .signal-note {
    border-radius: 1rem;
    align-items: flex-start;
  }
}