:root {
  color-scheme: dark;
  --bg: #071015;
  --surface: #0c171d;
  --surface-2: #10212a;
  --surface-3: #132832;
  --line: rgba(132, 190, 184, 0.24);
  --line-strong: rgba(132, 190, 184, 0.46);
  --text: #eef7f3;
  --muted: #a7bab5;
  --dim: #778c87;
  --cyan: #22c2d6;
  --green: #45d18e;
  --blue: #7aa8ff;
  --amber: #efb84a;
  --rose: #f2778f;
  --shadow: rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(7, 16, 21, 0.92), rgba(7, 16, 21, 1)),
    repeating-linear-gradient(90deg, rgba(34, 194, 214, 0.045) 0, rgba(34, 194, 214, 0.045) 1px, transparent 1px, transparent 76px),
    #071015;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.58;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 66px;
  padding: 12px 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 16, 21, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  color: var(--text);
  font-weight: 900;
  text-decoration: none;
}

.brand-mark {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 35%, var(--green), transparent 34%),
    radial-gradient(circle at 65% 60%, var(--cyan), transparent 38%),
    linear-gradient(145deg, var(--rose), var(--blue));
  box-shadow: 0 0 18px rgba(34, 194, 214, 0.34);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 4px;
}

.nav-links a {
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 800;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
  outline: none;
}

main {
  width: 100%;
}

.hero,
.section,
.footer {
  max-width: 1180px;
  margin: 0 auto;
  padding-left: 22px;
  padding-right: 22px;
}

.hero {
  min-height: 82vh;
  display: grid;
  align-items: center;
  gap: 34px;
  padding-top: 72px;
  padding-bottom: 54px;
}

.split-hero {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 470px);
}

.architecture-hero {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
  min-height: 64vh;
}

.hero-copy {
  max-width: 780px;
}

.hero-copy.wide {
  max-width: 900px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 0.79rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 980px;
  margin-bottom: 22px;
  font-size: 4.7rem;
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: 2.65rem;
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.04rem;
  line-height: 1.2;
}

.lead {
  max-width: 790px;
  color: #dcebe7;
  font-size: 1.28rem;
  font-weight: 650;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  color: var(--text);
  font-weight: 850;
  text-decoration: none;
}

.button.primary {
  border-color: rgba(69, 209, 142, 0.64);
  background: rgba(69, 209, 142, 0.14);
}

.button.secondary {
  border-color: rgba(122, 168, 255, 0.5);
  background: rgba(122, 168, 255, 0.1);
}

.button:hover,
.button:focus-visible {
  border-color: rgba(238, 247, 243, 0.76);
  transform: translateY(-1px);
  outline: none;
}

.visual-panel,
.status-panel {
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(12, 23, 29, 0.78);
  box-shadow: 0 24px 70px var(--shadow);
}

.visual-panel {
  overflow: hidden;
}

.visual-panel canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1.46 / 1;
  background: #08151b;
}

.visual-panel figcaption {
  padding: 13px 15px 15px;
  color: var(--muted);
  font-size: 0.92rem;
  border-top: 1px solid var(--line);
}

.status-panel {
  display: grid;
  gap: 10px;
  padding: 16px;
}

.status-panel div,
.stat-strip article,
.note-stack article,
.card,
.explain-grid article,
.architecture-stack article,
.timeline-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(16, 33, 42, 0.72);
}

.status-panel div {
  padding: 14px;
}

.status-panel span,
.stat-strip span {
  display: block;
  color: var(--dim);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-panel strong,
.stat-strip strong {
  display: block;
  margin-top: 4px;
  color: var(--cyan);
  font-size: 1.32rem;
  line-height: 1.1;
}

.stat-strip {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 0 22px 34px;
}

.stat-strip article {
  padding: 16px;
}

.section {
  padding-top: 70px;
  padding-bottom: 70px;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 26px;
}

.explain-grid,
.card-grid,
.caution-grid,
.code-grid,
.split-cards {
  display: grid;
  gap: 14px;
}

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

.explain-grid article,
.card {
  padding: 18px;
}

.explain-grid p,
.card p,
.architecture-stack p,
.timeline-item p,
.note-stack p,
.caution-grid p {
  color: var(--muted);
}

.band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(19, 40, 50, 0.55);
}

.band p {
  max-width: 1060px;
  margin: 0 auto;
  padding: 26px 22px;
  color: #e9f5f0;
  font-size: 1.22rem;
  font-weight: 750;
}

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

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 430px);
  gap: 24px;
  align-items: start;
}

.note-stack {
  display: grid;
  gap: 12px;
}

.note-stack article {
  padding: 16px;
}

.caution {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(239, 184, 74, 0.04);
}

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

.caution-grid article {
  padding: 18px;
  border: 1px solid rgba(239, 184, 74, 0.25);
  border-radius: 8px;
  background: rgba(239, 184, 74, 0.07);
}

.callout {
  text-align: left;
}

.callout p {
  max-width: 760px;
  color: var(--muted);
}

.architecture-stack {
  display: grid;
  gap: 12px;
}

.architecture-stack article {
  padding: 18px;
  display: grid;
  grid-template-columns: minmax(170px, 240px) minmax(0, 1fr);
  gap: 18px;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline-item {
  position: relative;
  padding: 18px 18px 18px 76px;
}

.timeline-item .step {
  position: absolute;
  left: 18px;
  top: 18px;
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(34, 194, 214, 0.52);
  border-radius: 50%;
  color: var(--cyan);
  font-weight: 900;
  background: rgba(34, 194, 214, 0.1);
}

pre {
  margin: 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(3, 9, 12, 0.78);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

code {
  font-family: "Cascadia Code", "JetBrains Mono", Consolas, monospace;
  font-size: 0.9rem;
}

pre code {
  display: block;
  min-width: 100%;
  padding: 16px;
  color: #d9f2ec;
  white-space: pre;
}

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

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

ul {
  margin: 0;
  padding-left: 19px;
  color: var(--muted);
}

li + li {
  margin-top: 7px;
}

.card.good {
  border-color: rgba(69, 209, 142, 0.32);
}

.card.warn {
  border-color: rgba(239, 184, 74, 0.32);
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 28px;
  padding-bottom: 34px;
  color: var(--dim);
  border-top: 1px solid var(--line);
}

.footer a {
  color: var(--muted);
  font-weight: 800;
  text-decoration: none;
}

.footer a:hover,
.footer a:focus-visible {
  color: var(--text);
  outline: none;
}

@media (max-width: 980px) {
  h1 {
    font-size: 3.6rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  .split-hero,
  .architecture-hero,
  .two-column {
    grid-template-columns: 1fr;
  }

  .stat-strip,
  .explain-grid,
  .card-grid,
  .caution-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .visual-panel {
    max-width: 620px;
  }
}

@media (max-width: 680px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

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

  h1 {
    font-size: 2.55rem;
  }

  h2 {
    font-size: 1.88rem;
  }

  .lead {
    font-size: 1.08rem;
  }

  .hero {
    min-height: auto;
    padding-top: 42px;
  }

  .stat-strip,
  .explain-grid,
  .card-grid,
  .caution-grid,
  .code-grid,
  .split-cards {
    grid-template-columns: 1fr;
  }

  .architecture-stack article {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .timeline-item {
    padding-left: 18px;
    padding-top: 68px;
  }

  .button {
    width: 100%;
  }
}