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

:root {
  color-scheme: dark;
  --bg: #0a0f14;
  --bg-raised: rgba(16, 24, 34, 0.92);
  --panel: rgba(17, 25, 34, 0.92);
  --panel-2: rgba(23, 34, 46, 0.86);
  --line: rgba(129, 153, 173, 0.25);
  --line-strong: rgba(217, 146, 85, 0.38);
  --text: #f4ecde;
  --muted: #b6c2cb;
  --copper: #d99255;
  --limestone: #ede4d4;
  --mist: #93a7b6;
  --shadow: 0 32px 90px rgba(0, 0, 0, 0.34);
  --radius-lg: 2rem;
  --radius-md: 1.4rem;
  --max-width: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 14% 12%, rgba(217, 146, 85, 0.18), transparent 28%),
    radial-gradient(circle at 82% 20%, rgba(147, 167, 182, 0.16), transparent 24%),
    linear-gradient(180deg, #0b1117 0%, #0a0f14 45%, #0d141b 100%);
  color: var(--text);
  font-family: "Instrument Sans", sans-serif;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
}

body::before {
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 76%);
}

body::after {
  background:
    radial-gradient(circle at 22% 34%, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px),
    radial-gradient(circle at 77% 11%, rgba(217, 146, 85, 0.12) 0 1.5px, transparent 1.5px),
    radial-gradient(circle at 88% 64%, rgba(147, 167, 182, 0.1) 0 1px, transparent 1px);
}

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

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

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

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

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 50;
  padding: 0.7rem 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;
}

.panel {
  background: linear-gradient(180deg, rgba(18, 27, 36, 0.94), rgba(13, 20, 28, 0.96));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0 0.9rem;
}

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

.brand {
  display: inline-flex;
  max-width: 24rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.7rem;
}

.nav a {
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(10, 15, 20, 0.6);
  color: var(--muted);
}

.nav a:hover {
  color: var(--text);
  border-color: var(--line-strong);
  transform: translateY(-1px);
}

.section {
  margin-top: 4.4rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 1.5rem;
  align-items: stretch;
}

.hero-copy,
.hero-visual,
.feature-card,
.use-case-card,
.api-card,
.closing-card,
.faq-list details {
  border-radius: var(--radius-lg);
}

.hero-copy {
  position: relative;
  overflow: hidden;
  padding: 2.8rem;
}

.hero-copy::after {
  content: "";
  position: absolute;
  right: -4rem;
  top: -4rem;
  width: 15rem;
  height: 15rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 146, 85, 0.28), transparent 72%);
}

.hero-visual {
  display: grid;
  gap: 1rem;
  padding: 1.6rem;
}

.eyebrow,
.card-tag,
.signal-label {
  margin: 0;
  color: var(--copper);
  font-family: "Tektur", sans-serif;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
summary {
  margin: 0;
  font-family: "Tektur", sans-serif;
  letter-spacing: -0.02em;
}

h1 {
  max-width: 10ch;
  font-size: clamp(3rem, 6vw, 5.4rem);
  line-height: 0.94;
}

h2 {
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 0.98;
}

h3 {
  font-size: 1.25rem;
  line-height: 1.1;
}

p,
li {
  color: var(--muted);
  line-height: 1.68;
}

.hero-dek {
  max-width: 62ch;
  margin-top: 1.2rem;
  font-size: 1.05rem;
}

.hero-actions,
.closing-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: 3.3rem;
  padding: 0.95rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(180deg, #ebae75, #d99255);
  color: #111;
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--line-strong);
}

.source-note {
  max-width: 58ch;
  margin-top: 1rem;
  padding-left: 0.9rem;
  border-left: 2px solid rgba(217, 146, 85, 0.45);
  font-size: 0.96rem;
}

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

.stat-card {
  padding: 1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: 1.3rem;
  background: rgba(255, 255, 255, 0.025);
}

.stat-card dt {
  color: var(--mist);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.stat-card dd {
  margin: 0.5rem 0 0;
  color: var(--text);
  font-family: "Instrument Serif", serif;
  font-size: 1.3rem;
}

.signal-frame {
  position: relative;
  padding: 1rem;
  border-radius: 1.6rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01)),
    linear-gradient(180deg, rgba(15, 22, 30, 0.92), rgba(12, 18, 24, 0.96));
}

.signal-frame::after {
  content: "";
  position: absolute;
  inset: 1rem;
  border: 1px solid rgba(147, 167, 182, 0.12);
  border-radius: 1.2rem;
  pointer-events: none;
}

.signal-list {
  display: grid;
  gap: 0.85rem;
}

.signal-list > div {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 1.3rem;
  background: rgba(9, 14, 19, 0.66);
}

.signal-list p {
  margin: 0.45rem 0 0;
}

.section-heading {
  max-width: 58rem;
  margin-bottom: 1.5rem;
}

.section-heading p:last-child {
  max-width: 56ch;
  margin-top: 0.75rem;
}

.card-grid,
.use-case-grid,
.api-layout {
  display: grid;
  gap: 1rem;
}

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

.feature-card,
.use-case-card,
.api-card {
  padding: 1.5rem;
}

.feature-card p:last-child,
.use-case-card p {
  margin: 0.75rem 0 0;
}

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

.use-case-card {
  min-height: 15rem;
  background:
    linear-gradient(160deg, rgba(217, 146, 85, 0.08), transparent 44%),
    linear-gradient(180deg, rgba(18, 27, 36, 0.94), rgba(13, 20, 28, 0.96));
}

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

.compact-list {
  padding-left: 1rem;
  margin: 0.9rem 0 0;
}

.compact-list li + li {
  margin-top: 0.7rem;
}

.code-panel pre {
  overflow-x: auto;
  margin: 1rem 0 0;
  padding: 1rem;
  border-radius: 1.1rem;
  background: rgba(5, 8, 12, 0.84);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.faq-list {
  display: grid;
  gap: 0.9rem;
}

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

.faq-list summary {
  list-style: none;
  cursor: pointer;
  padding-right: 2rem;
  position: relative;
}

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

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  color: var(--copper);
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list p {
  margin: 0.9rem 0 0;
  max-width: 62ch;
}

.closing-card {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 1.4rem;
  padding: 1.8rem;
  align-items: center;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  margin-top: 4rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer p {
  margin: 0;
  font-size: 0.95rem;
}

@media (max-width: 1040px) {
  .hero,
  .closing-card,
  .card-grid,
  .use-case-grid,
  .api-layout {
    grid-template-columns: 1fr;
  }
}

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

  .topbar {
    position: static;
    flex-direction: column;
    align-items: stretch;
  }

  .brand {
    max-width: 18rem;
  }

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

  .hero-copy {
    padding: 2rem 1.35rem;
  }

  .hero-visual,
  .feature-card,
  .use-case-card,
  .api-card,
  .closing-card,
  .faq-list details {
    border-radius: 1.5rem;
  }

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

  h1 {
    font-size: clamp(2.6rem, 11vw, 4rem);
  }

  h2 {
    font-size: clamp(1.7rem, 8vw, 2.6rem);
  }
}