/* InterceptAI site design system. Shared across all pages.
   Warm-ink / amber terminal palette, theme-aware. Zero external deps. */

:root {
  --ground: #0C0B09;
  --surface: #16130F;
  --surface-2: #1E1912;
  --border: #2A241B;
  --border-strong: #3A3226;
  --ink: #ECE6DA;
  --ink-dim: #A99F8C;
  --ink-faint: #756B5B;
  --accent: #E0A458;
  --accent-bright: #F2B96E;
  --deny: #D9694B;
  --allow: #86AE77;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --measure: 64ch;
}
@media (prefers-color-scheme: light) {
  :root {
    --ground: #F7F4EE; --surface: #FFFFFF; --surface-2: #FBF7EF; --border: #E5DDCD;
    --border-strong: #D6CBB6; --ink: #1A1611; --ink-dim: #5B5344; --ink-faint: #8A806D;
    --accent: #A96D16; --accent-bright: #B67B22; --deny: #B4472C; --allow: #567C46;
  }
}
:root[data-theme="dark"] {
  --ground: #0C0B09; --surface: #16130F; --surface-2: #1E1912; --border: #2A241B;
  --border-strong: #3A3226; --ink: #ECE6DA; --ink-dim: #A99F8C; --ink-faint: #756B5B;
  --accent: #E0A458; --accent-bright: #F2B96E; --deny: #D9694B; --allow: #86AE77;
}
:root[data-theme="light"] {
  --ground: #F7F4EE; --surface: #FFFFFF; --surface-2: #FBF7EF; --border: #E5DDCD;
  --border-strong: #D6CBB6; --ink: #1A1611; --ink-dim: #5B5344; --ink-faint: #8A806D;
  --accent: #A96D16; --accent-bright: #B67B22; --deny: #B4472C; --allow: #567C46;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--ground); color: var(--ink); font-family: var(--sans);
  font-size: 17px; line-height: 1.65; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: inherit; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 40px); }

/* ---- nav ---- */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--border);
}
.nav-inner { max-width: 960px; margin: 0 auto; padding: 14px clamp(20px, 5vw, 40px); display: flex; align-items: center; gap: 22px; }
.brand { font-family: var(--mono); font-weight: 600; letter-spacing: 0.02em; color: var(--ink); text-decoration: none; margin-right: auto; display: inline-flex; align-items: baseline; gap: 8px; }
.brand .co { color: var(--accent); }
.brand .prod { color: var(--ink-dim); font-weight: 400; font-size: 0.9em; }
.nav a.link { font-family: var(--mono); font-size: 13.5px; color: var(--ink-dim); text-decoration: none; }
.nav a.link:hover { color: var(--accent-bright); }
.nav a.gh { color: var(--ink); border: 1px solid var(--border-strong); border-radius: 7px; padding: 6px 12px; }
.nav a.gh:hover { border-color: var(--accent); color: var(--accent-bright); }
@media (max-width: 560px) { .nav a.hide-sm { display: none; } }

/* ---- shared type ---- */
.eyebrow { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.24em; text-transform: uppercase; color: var(--accent); margin: 0; }
h1 { font-family: var(--mono); font-weight: 600; font-size: clamp(32px, 6vw, 58px); line-height: 1.05; letter-spacing: -0.015em; text-wrap: balance; margin: 16px 0 0; max-width: 18ch; }
.lede { font-size: clamp(17px, 2.2vw, 20px); color: var(--ink-dim); max-width: 56ch; margin: 22px 0 0; text-wrap: pretty; }
.lede strong { color: var(--ink); font-weight: 600; }
section { margin: 72px 0 0; }
h2 { font-family: var(--mono); font-weight: 600; font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin: 0 0 22px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
h3 { font-family: var(--sans); font-size: 18px; font-weight: 650; margin: 0 0 6px; color: var(--ink); letter-spacing: -0.005em; }
p { margin: 0 0 16px; max-width: var(--measure); text-wrap: pretty; }
strong { color: var(--ink); font-weight: 650; }
.section-lede { font-size: clamp(19px, 2.4vw, 23px); color: var(--ink); font-weight: 500; max-width: 32ch; line-height: 1.35; letter-spacing: -0.01em; }

/* ---- buttons ---- */
.btns { display: flex; gap: 14px; flex-wrap: wrap; margin: 32px 0 0; }
.btn { font-family: var(--mono); font-size: 14px; text-decoration: none; padding: 12px 22px; border-radius: 8px; border: 1px solid transparent; display: inline-flex; align-items: center; gap: 9px; transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn.primary { background: var(--accent); color: #17130C; font-weight: 600; border-color: var(--accent); }
.btn.primary:hover { background: var(--accent-bright); border-color: var(--accent-bright); }
.btn.ghost { background: var(--surface); color: var(--ink); border-color: var(--border-strong); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent-bright); }
.btn .ar { color: currentColor; opacity: 0.7; }

/* ---- stat strip ---- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin: 44px 0 0; }
@media (max-width: 680px) { .stats { grid-template-columns: 1fr; } }
.stat { background: var(--surface); padding: 24px clamp(18px, 3vw, 26px) 22px; display: flex; flex-direction: column; gap: 9px; }
.stat .cap { font-family: var(--mono); font-size: 11px; letter-spacing: 0.13em; text-transform: uppercase; color: var(--accent); }
.stat .figure { font-family: var(--mono); font-weight: 600; font-size: clamp(28px, 4.2vw, 38px); line-height: 1; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; color: var(--ink); display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.figure .from { color: var(--ink-faint); font-size: 0.62em; text-decoration: line-through; text-decoration-color: var(--deny); text-decoration-thickness: 2px; }
.figure .to-arrow { color: var(--accent); font-size: 0.6em; }
.figure .to { color: var(--accent-bright); }
.figure .unit { color: var(--ink-faint); font-size: 0.45em; font-weight: 500; }
.stat .desc { font-size: 14px; color: var(--ink-dim); line-height: 1.5; }

/* ---- mechanism points ---- */
.points { display: flex; flex-direction: column; gap: 22px; margin: 28px 0 0; }
.point { display: grid; grid-template-columns: 26px 1fr; gap: 14px; align-items: start; max-width: var(--measure); }
.point .mark { font-family: var(--mono); color: var(--accent); font-size: 15px; line-height: 1.6; }
.point p { margin: 0; }
.point .desc { color: var(--ink-dim); font-size: 15.5px; }
.point code { font-family: var(--mono); color: var(--ink-dim); font-size: 0.92em; }

/* ---- cards / cta ---- */
.cta { margin: 76px 0 0; background: var(--surface); border: 1px solid var(--border-strong); border-radius: 14px; padding: clamp(28px, 5vw, 46px); }
.cta .kicker { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin: 0 0 16px; }
.cta .big { font-family: var(--mono); font-size: clamp(21px, 3vw, 28px); color: var(--ink); font-weight: 600; letter-spacing: -0.015em; margin: 0 0 16px; line-height: 1.2; max-width: 26ch; }
.cta p { font-size: 16.5px; color: var(--ink-dim); max-width: 56ch; }
.terms { font-size: 13.5px; color: var(--ink-faint); margin: 20px 0 0; max-width: 56ch; line-height: 1.6; }

/* ---- footer ---- */
footer { margin: 80px 0 40px; padding-top: 24px; border-top: 1px solid var(--border); font-family: var(--mono); font-size: 12px; color: var(--ink-faint); letter-spacing: 0.03em; line-height: 1.9; display: flex; flex-wrap: wrap; gap: 8px 28px; justify-content: space-between; }
footer a { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }
footer a:hover { color: var(--accent-bright); }
footer a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.foot-links { display: flex; gap: 22px; flex-wrap: wrap; }

/* ---- blog ---- */
.page-head { margin-top: 56px; }
.post-list { list-style: none; padding: 0; margin: 36px 0 0; display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.post-list li { background: var(--surface); }
.post-list a { display: block; padding: 22px clamp(18px, 3vw, 26px); text-decoration: none; transition: background 0.15s ease; }
.post-list a:hover { background: var(--surface-2); }
.post-list .date { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.post-list .title { font-size: 19px; font-weight: 650; color: var(--ink); margin: 6px 0 4px; letter-spacing: -0.01em; }
.post-list .excerpt { color: var(--ink-dim); font-size: 15px; max-width: var(--measure); }

/* ---- article ---- */
.article { max-width: 70ch; margin: 48px auto 0; }
.article .date { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.article h1 { font-size: clamp(28px, 4.6vw, 42px); max-width: 24ch; margin-top: 14px; }
.article h2 { border: 0; padding: 0; font-family: var(--sans); text-transform: none; letter-spacing: -0.01em; font-size: 22px; color: var(--ink); margin: 40px 0 12px; }
.article p { font-size: 17.5px; color: var(--ink); max-width: 70ch; margin: 0 0 18px; }
.article p.sub { color: var(--ink-dim); font-size: 19px; margin-top: 16px; }
.article a { color: var(--accent); }
.article code { font-family: var(--mono); background: var(--surface); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; font-size: 0.9em; color: var(--ink); }
.article ul { color: var(--ink-dim); max-width: 70ch; padding-left: 22px; }
.article li { margin: 8px 0; }
.article blockquote { border-left: 2px solid var(--accent); margin: 24px 0; padding: 4px 0 4px 18px; color: var(--ink-dim); font-size: 18px; }

.fade { opacity: 0; transform: translateY(10px); animation: rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) forwards; }
.fade.d1 { animation-delay: 0.06s; } .fade.d2 { animation-delay: 0.14s; } .fade.d3 { animation-delay: 0.22s; } .fade.d4 { animation-delay: 0.30s; }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .fade { animation: none; opacity: 1; transform: none; } }