:root {
  --bg: #0a1116;
  --bg-panel: #111b22;
  --ink: #e8f2f7;
  --muted: #97a8b3;
  --line: #244153;
  --accent: #5eead4;
  --accent-2: #93c5fd;
  --good: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 80% -10%, rgba(94, 234, 212, 0.15), transparent 35%),
    radial-gradient(circle at 10% 0%, rgba(147, 197, 253, 0.14), transparent 30%),
    var(--bg);
  line-height: 1.5;
}

.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.header {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(17, 27, 34, 0.95), rgba(17, 27, 34, 0.75));
  border-radius: 16px;
  padding: 1rem 1.1rem;
}

.hero-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.hero-copy {
  min-width: 0;
}

.hero-copy .badge {
  margin-bottom: 0.45rem;
}

.hero-copy h1 {
  margin: 0 0 0.25rem;
}

.hero-copy .subtitle {
  max-width: 42rem;
}

.hero-mark {
  width: min(124px, 24vw);
  flex: 0 0 auto;
}

.hero-mark img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  filter: drop-shadow(0 10px 22px rgba(0, 0, 0, 0.22));
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  margin-bottom: 0.6rem;
}

h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 1.25rem;
}

.nav a {
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(17, 27, 34, 0.75);
  padding: 0.45rem 0.75rem;
  font-size: 0.9rem;
}

.nav a.active {
  border-color: var(--accent);
  color: var(--accent);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.stat {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-panel);
  padding: 0.7rem;
}

.stat .num {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-2);
}

.stat .label {
  color: var(--muted);
  font-size: 0.8rem;
}

.section {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(17, 27, 34, 0.86);
  padding: 1rem;
  margin-bottom: 1rem;
}

.section h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.section h3 {
  font-size: 1rem;
  margin-top: 1.2rem;
  margin-bottom: 0.4rem;
  color: var(--accent-2);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.7rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 0.7rem;
}

.arch-diagram {
  display: grid;
  justify-items: center;
  gap: 0.55rem;
  margin-bottom: 1rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0d171f;
}

.arch-node {
  width: min(100%, 420px);
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(17, 27, 34, 0.95);
  padding: 0.8rem 0.9rem;
  text-align: center;
}

.arch-title {
  color: var(--accent-2);
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.arch-text {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.arch-arrow {
  color: var(--accent);
  font-size: 1.2rem;
  line-height: 1;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0d171f;
  padding: 0.8rem;
}

.card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: var(--ink);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.callout {
  border: 1px solid var(--accent);
  border-radius: 12px;
  background: rgba(94, 234, 212, 0.05);
  padding: 0.9rem 1rem;
  margin-bottom: 1rem;
}

.callout p {
  margin: 0;
  font-size: 1rem;
}

code, pre {
  font-family: "IBM Plex Mono", "Fira Code", monospace;
}

code {
  background: rgba(36, 65, 83, 0.6);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  font-size: 0.88em;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  color: #bce7ff;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0a151d;
  padding: 0.8rem;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 0.5rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.table th,
.table td {
  border: 1px solid var(--line);
  padding: 0.45rem 0.6rem;
  text-align: left;
  white-space: nowrap;
}

.table th {
  background: rgba(17, 27, 34, 0.9);
  color: var(--muted);
  font-weight: 600;
}

.table tr:hover td {
  background: rgba(36, 65, 83, 0.3);
}

.tag {
  color: #062c20;
  background: var(--good);
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.tag-bad {
  color: #2d0a0a;
  background: var(--bad);
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.tag-warn {
  color: #1c0f00;
  background: var(--warn);
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.divider {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0.9rem 0;
}

.reading-note {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--line);
}

.footer {
  color: var(--muted);
  text-align: center;
  font-size: 0.9rem;
  margin-top: 1rem;
}