:root {
  color-scheme: light;
  --bg: #f6f8f9;
  --paper: #ffffff;
  --ink: #172126;
  --muted: #60717a;
  --line: #dce4e8;
  --blue: #2454a6;
  --cyan: #0d7d8b;
  --green: #27714b;
  --red: #9f3030;
  --amber: #b26717;
  --shadow: 0 18px 48px rgba(23, 33, 38, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--blue);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

code {
  background: #eef3f6;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: #1e3d58;
  font-size: 0.92em;
  padding: 0.1rem 0.28rem;
}

pre {
  margin: 0;
  overflow-x: auto;
  background: #101820;
  border-radius: 8px;
  color: #e8f2f5;
  padding: 1rem;
}

pre code {
  background: transparent;
  border: 0;
  color: inherit;
  padding: 0;
}

.site-header {
  background: rgba(246, 248, 249, 0.9);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
}

.topbar {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1160px;
  padding: 0.8rem 1.25rem;
}

.brand {
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.93rem;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.hero {
  align-items: stretch;
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  margin: 0 auto;
  max-width: 1160px;
  min-height: calc(100svh - 92px);
  padding: 5rem 1.25rem 3rem;
}

.hero-copy {
  align-self: center;
}

.eyebrow,
.section-kicker {
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 0.7rem;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.12;
  margin: 0;
  overflow-wrap: break-word;
}

h1 {
  font-size: 4.6rem;
  max-width: 11ch;
}

h2 {
  font-size: 2.45rem;
  max-width: 18ch;
}

h3 {
  font-size: 1.05rem;
}

.lead {
  color: var(--muted);
  font-size: 1.2rem;
  max-width: 680px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.7rem;
}

.button {
  align-items: center;
  border-radius: 8px;
  display: inline-flex;
  font-weight: 750;
  min-height: 2.8rem;
  padding: 0.75rem 1rem;
  text-decoration: none;
}

.button.primary {
  background: var(--blue);
  color: white;
}

.button.secondary {
  background: white;
  border: 1px solid var(--line);
  color: var(--ink);
}

.hero-panel {
  align-items: center;
  background:
    linear-gradient(135deg, rgba(36, 84, 166, 0.16), transparent 45%),
    linear-gradient(160deg, #fdfefe, #e7eef1);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  display: grid;
  min-height: 520px;
  overflow: hidden;
  padding: 1.5rem;
  position: relative;
}

.signal-grid {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(4, 1fr);
  inset: 1.25rem;
  opacity: 0.4;
  position: absolute;
}

.signal-grid span {
  border: 1px solid rgba(96, 113, 122, 0.25);
  border-radius: 6px;
}

.flow-card {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 36px rgba(23, 33, 38, 0.12);
  margin: auto;
  max-width: 370px;
  padding: 1.2rem;
  position: relative;
  width: 100%;
}

.camera-icon {
  align-items: center;
  aspect-ratio: 16 / 10;
  background: #172126;
  border-radius: 8px;
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
  position: relative;
}

.camera-icon::before,
.camera-icon::after,
.camera-icon span {
  content: "";
  display: block;
  position: absolute;
}

.camera-icon::before {
  background: #e8f2f5;
  border-radius: 5px;
  height: 42%;
  width: 56%;
}

.camera-icon::after {
  border: 9px solid transparent;
  border-left-color: #e8f2f5;
  right: 16%;
}

.camera-icon span {
  background: var(--cyan);
  border-radius: 50%;
  height: 18%;
  width: 11%;
  z-index: 1;
}

.mini-flow {
  counter-reset: steps;
  list-style: none;
  margin: 0;
  padding: 0;
}

.mini-flow li {
  align-items: center;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 0.7rem;
  padding: 0.85rem 0;
}

.mini-flow li::before {
  align-items: center;
  background: #e8f2f5;
  border-radius: 50%;
  color: var(--blue);
  content: counter(steps);
  counter-increment: steps;
  display: inline-flex;
  flex: 0 0 1.6rem;
  font-size: 0.82rem;
  font-weight: 800;
  height: 1.6rem;
  justify-content: center;
}

.summary-band,
.article,
.footer {
  margin: 0 auto;
  max-width: 1160px;
}

.summary-band {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
  padding: 0 1.25rem 3rem;
}

.summary-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
}

.summary-item strong {
  display: block;
  margin-bottom: 0.35rem;
}

.summary-item span {
  color: var(--muted);
}

.article {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 32px rgba(23, 33, 38, 0.06);
  margin-bottom: 3rem;
  overflow: hidden;
}

.section {
  padding: 4rem 1.25rem;
}

.article .section {
  border-top: 1px solid var(--line);
  margin: 0 auto;
  max-width: 980px;
}

.article .section:first-child {
  border-top: 0;
}

.section p {
  color: #34464f;
  max-width: 780px;
}

.two-column,
.code-layout {
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.82fr);
}

.check-list,
.file-list {
  margin: 0;
  padding-left: 1.15rem;
}

.check-list li,
.file-list li {
  margin: 0.45rem 0;
}

.value-grid,
.result-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

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

.value-item,
.result-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
}

.value-item p,
.result-card p {
  margin-bottom: 0;
}

.term-list {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, 1fr);
  margin: 1.4rem 0 0;
}

.term-list div {
  border-left: 4px solid var(--cyan);
  padding-left: 1rem;
}

.term-list dt {
  font-weight: 800;
}

.term-list dd {
  color: var(--muted);
  margin: 0.2rem 0 0;
}

.architecture {
  align-items: stretch;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(6, minmax(110px, 1fr));
  margin: 1.5rem 0;
  overflow-x: auto;
  padding-bottom: 0.4rem;
}

.arch-node {
  align-items: center;
  background: #f3f7f9;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  font-weight: 800;
  justify-content: center;
  min-height: 96px;
  min-width: 120px;
  padding: 0.8rem;
  text-align: center;
}

.arch-node.accent {
  background: #e8f2f5;
  border-color: rgba(13, 125, 139, 0.5);
  color: #0a5862;
}

.arch-arrow {
  display: none;
}

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

.result-card.success {
  border-color: rgba(39, 113, 75, 0.42);
}

.result-card.fail {
  border-color: rgba(159, 48, 48, 0.28);
}

.status {
  border-radius: 999px;
  display: inline-flex;
  font-size: 0.76rem;
  font-weight: 850;
  margin-bottom: 0.75rem;
  padding: 0.2rem 0.55rem;
}

.success .status {
  background: rgba(39, 113, 75, 0.12);
  color: var(--green);
}

.fail .status {
  background: rgba(159, 48, 48, 0.1);
  color: var(--red);
}

.references ul {
  margin-bottom: 0;
}

.footer {
  color: var(--muted);
  padding: 0 1.25rem 3rem;
  text-align: center;
}

@media (max-width: 900px) {
  .hero,
  .two-column,
  .code-layout,
  .summary-band,
  .value-grid,
  .term-list,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 3rem;
  }

  h1 {
    font-size: 3.4rem;
    max-width: 12ch;
  }

  .hero-panel {
    min-height: 420px;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero {
    padding-top: 2rem;
  }

  h1 {
    font-size: 2.35rem;
    max-width: 11ch;
  }

  h2 {
    font-size: 1.85rem;
  }

  .lead {
    font-size: 1.05rem;
  }

  .section {
    padding: 3rem 1rem;
  }

  .article {
    border-left: 0;
    border-radius: 0;
    border-right: 0;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .button {
    justify-content: center;
  }
}