/* ============================================================
   Base
   ============================================================ */
:root {
  --bg: #0f1115;
  --surface: #161922;
  --surface-2: #1d212c;
  --ink: #e6e8ee;
  --ink-dim: #a4abba;
  --ink-mute: #7a8294;
  --border: #2a2f3d;

  --good: #2fbf71;
  --good-bg: rgba(47, 191, 113, 0.08);
  --good-bd: rgba(47, 191, 113, 0.35);

  --bad: #ef5a5a;
  --bad-bg: rgba(239, 90, 90, 0.08);
  --bad-bd: rgba(239, 90, 90, 0.35);

  --accent: #7aa7ff;
  --code-bg: #0b0d12;
  --code-ink: #e8eaf0;

  --radius: 10px;
  --shadow: 0 1px 0 rgba(255,255,255,0.03), 0 8px 24px rgba(0,0,0,0.25);

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: 0.9em; }
em { font-style: italic; color: var(--ink-dim); }

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  padding: 64px 0 32px;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(1200px 400px at 20% -50%, rgba(122, 167, 255, 0.10), transparent 60%),
    radial-gradient(800px 400px at 90% -20%, rgba(47, 191, 113, 0.08), transparent 60%);
}
.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.site-header h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.lede {
  margin: 0;
  max-width: 70ch;
  color: var(--ink-dim);
  font-size: 17px;
}

/* ============================================================
   Table of contents
   ============================================================ */
.toc {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: saturate(150%) blur(8px);
  -webkit-backdrop-filter: saturate(150%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.toc ol {
  margin: 0;
  padding: 12px 0;
  list-style: none;
  display: flex;
  gap: 4px 18px;
  flex-wrap: wrap;
  font-size: 14px;
}
.toc a {
  color: var(--ink-dim);
  padding: 6px 8px;
  border-radius: 6px;
}
.toc a:hover {
  color: var(--ink);
  background: var(--surface);
  text-decoration: none;
}

/* ============================================================
   Sections
   ============================================================ */
main { padding-bottom: 80px; }

.section {
  padding-top: 56px;
  scroll-margin-top: 72px;
}
.section-header {
  margin-bottom: 24px;
}
.section-num {
  margin: 0 0 4px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.section-header h2 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.01em;
}
.section-intro {
  margin: 8px 0 0;
  color: var(--ink-dim);
  max-width: 70ch;
}

/* ============================================================
   Card
   ============================================================ */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 16px 0;
  box-shadow: var(--shadow);
}
.card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.card-header h3 {
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.005em;
}
.card-header .anchor {
  margin-left: auto;
  color: var(--ink-mute);
  font-family: var(--mono);
  font-size: 14px;
  padding: 2px 8px;
  border-radius: 6px;
}
.card-header .anchor:hover {
  background: var(--surface-2);
  color: var(--ink);
  text-decoration: none;
}
.badge {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--good);
  background: var(--good-bg);
  border: 1px solid var(--good-bd);
  padding: 3px 8px;
  border-radius: 999px;
}

/* ============================================================
   Good/Bad split
   ============================================================ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.single { display: block; }

.panel {
  position: relative;
  padding: 16px;
  border-radius: 8px;
  border: 1px solid;
  background: var(--surface-2);
}
.panel.full { margin-top: 12px; }
.panel.good {
  border-color: var(--good-bd);
  background: var(--good-bg);
}
.panel.bad {
  border-color: var(--bad-bd);
  background: var(--bad-bg);
}
.panel-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.panel.good .panel-title { color: var(--good); }
.panel.bad .panel-title { color: var(--bad); }
.panel p { margin: 0 0 10px; }
.panel p:last-child { margin-bottom: 0; }
.panel-note {
  font-size: 13px;
  color: var(--ink-dim);
  font-style: italic;
}

.why {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-left: 3px solid var(--accent);
  background: rgba(122, 167, 255, 0.06);
  border-radius: 4px;
  font-size: 14.5px;
  color: var(--ink-dim);
}
.why strong { color: var(--ink); }

/* ============================================================
   Code blocks
   ============================================================ */
pre {
  position: relative;
  margin: 8px 0 0;
  padding: 14px 14px 14px 14px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--code-ink);
}
pre code {
  font-size: inherit;
  color: inherit;
  background: transparent;
  white-space: pre;
}

button.copy {
  position: absolute;
  top: 8px;
  right: 8px;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  cursor: pointer;
  transition: all 120ms ease;
}
button.copy:hover {
  color: var(--ink);
  border-color: var(--ink-mute);
}
button.copy.copied {
  color: var(--good);
  border-color: var(--good-bd);
  background: var(--good-bg);
}

/* Inline code in panel paragraphs */
.panel p code,
.why code {
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* ============================================================
   Tabs (TLS 1.2 IANA vs OpenSSL)
   ============================================================ */
.tabs {
  display: flex;
  gap: 4px;
  margin: 4px 0 8px;
  border-bottom: 1px solid var(--border);
}
.tab {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-dim);
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 8px 12px;
  cursor: pointer;
  margin-bottom: -1px;
}
.tab:hover { color: var(--ink); }
.tab.active {
  color: var(--good);
  border-bottom-color: var(--good);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============================================================
   Performance grid
   ============================================================ */
.perf-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.perf-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.perf-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--accent);
}
.perf-card p { margin: 0; color: var(--ink-dim); font-size: 14.5px; }
.perf-card.span-2 { grid-column: span 2; }

/* ============================================================
   Closing
   ============================================================ */
.section.closing { padding-top: 56px; }
.closing-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.closing-panel p { margin: 0 0 10px; color: var(--ink-dim); }
.closing-panel p:last-child { margin-bottom: 0; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  margin-top: 40px;
  color: var(--ink-mute);
  font-size: 14px;
}
.site-footer p { margin: 0 0 6px; }
.site-footer .fine { font-size: 12.5px; color: var(--ink-mute); opacity: 0.8; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 720px) {
  .split { grid-template-columns: 1fr; }
  .perf-grid { grid-template-columns: 1fr; }
  .perf-card.span-2 { grid-column: span 1; }
  .site-header { padding: 40px 0 24px; }
  .section { padding-top: 40px; }
  .toc ol { gap: 2px 10px; font-size: 13px; }
}

/* ============================================================
   Intent banner (shared) + bad-site intentional-demo banner
   ============================================================ */
.intent-banner {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-dim);
  padding: 14px 0;
  font-size: 14px;
}
.intent-banner code {
  background: var(--code-bg);
  color: var(--code-ink);
  padding: 1px 6px;
  border-radius: 4px;
}
.intent-banner strong { color: var(--ink); }

.demo-banner {
  background: linear-gradient(90deg, #4a1414, #6a1818);
  color: #fff;
  border-bottom: 2px solid #ef5a5a;
  padding: 18px 0;
  font-size: 15px;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.demo-banner .wrap {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.demo-banner .tag {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: #ef5a5a;
  color: #1a0808;
  padding: 4px 8px;
  border-radius: 4px;
  font-weight: 700;
  white-space: nowrap;
  margin-top: 1px;
}
.demo-banner p { margin: 0; }
.demo-banner strong { color: #fff; }
.demo-banner a { color: #ffd5d5; }

/* ============================================================
   Section 5: Documented, Not Deployed
   ============================================================ */
.section-lede {
  color: var(--ink-dim);
  font-size: 15px;
  margin: 4px 0 0;
  max-width: 70ch;
}
.not-deployed,
.not-deployed-here {
  margin-top: 12px;
  padding: 10px 14px;
  border-left: 3px solid var(--ink-mute);
  background: var(--surface-2);
  color: var(--ink-dim);
  font-size: 14px;
  border-radius: 0 6px 6px 0;
}
.not-deployed strong,
.not-deployed-here strong {
  color: var(--ink);
}