/* HTTrail — site styles
   Brand: dark navy base, "trail" gradient (violet→blue→cyan→emerald), gold lock accent.
   No third-party assets or fonts: the site makes zero external network calls. */

:root {
  /* Surfaces */
  --bg-0: #06050E;
  --bg-1: #0B091A;
  --bg-2: #14193F;
  --bg-3: #0F3346;
  --panel: rgba(255, 255, 255, 0.025);
  --panel-2: rgba(255, 255, 255, 0.045);
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);

  /* Ink */
  --ink: #ECEAF6;
  --ink-dim: #A8A3C4;
  --ink-faint: #6F6A8C;

  /* Trail palette */
  --violet: #8B5CF6;
  --blue: #3B82F6;
  --cyan: #06B6D4;
  --emerald: #10B981;
  --gold: #FBBF24;
  --gold-2: #F59E0B;

  --trail: linear-gradient(90deg, #8B5CF6 0%, #3B82F6 32%, #06B6D4 68%, #10B981 100%);

  --radius: 16px;
  --radius-lg: 22px;
  --wrap: 1140px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;

  --shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.8);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Page-wide ambient background: navy gradient + faint grid + glow blobs */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1100px 700px at 12% -8%, rgba(139, 92, 246, 0.16), transparent 60%),
    radial-gradient(1000px 720px at 92% 4%, rgba(6, 182, 212, 0.14), transparent 58%),
    radial-gradient(900px 800px at 60% 120%, rgba(16, 185, 129, 0.10), transparent 60%),
    linear-gradient(160deg, var(--bg-1) 0%, var(--bg-2) 48%, var(--bg-3) 100%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(120% 100% at 50% 0%, #000 35%, transparent 78%);
          mask-image: radial-gradient(120% 100% at 50% 0%, #000 35%, transparent 78%);
}

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: clamp(20px, 5vw, 40px); }

a { color: var(--cyan); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: #5fd6ec; }

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }

/* Skip link */
.skip {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--cyan); color: #04121a; padding: 10px 16px; border-radius: 0 0 10px 0; font-weight: 600;
}
.skip:focus { left: 0; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(8, 7, 18, 0.62);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; letter-spacing: -0.02em; color: var(--ink); font-size: 1.12rem; }
.brand img { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 4px 14px rgba(0,0,0,0.5); }
.brand b { background: var(--trail); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--ink-dim); font-size: 0.94rem; font-weight: 500; }
.nav-links a:hover { color: var(--ink); }
@media (max-width: 720px) { .nav-links a.hide-sm { display: none; } }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 20px; border-radius: 12px; font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent; cursor: pointer; transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease; white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { color: #050410; background: linear-gradient(120deg, #a78bfa, #38bdf8 55%, #34d399); box-shadow: 0 10px 30px -8px rgba(56, 189, 248, 0.5); }
.btn-primary:hover { transform: translateY(-2px); color: #050410; box-shadow: 0 16px 40px -10px rgba(56, 189, 248, 0.6); }
.btn-ghost { color: var(--ink); background: var(--panel-2); border-color: var(--line-strong); }
.btn-ghost:hover { color: var(--ink); background: rgba(255,255,255,0.08); transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: clamp(64px, 11vw, 132px) 0 clamp(48px, 8vw, 96px); }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
@media (max-width: 920px) { .hero-grid { grid-template-columns: 1fr; } }

.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--ink-dim); background: var(--panel-2); border: 1px solid var(--line); padding: 7px 14px; border-radius: 999px;
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--emerald); box-shadow: 0 0 10px var(--emerald); }

h1.hero-title {
  font-size: clamp(2.5rem, 6.2vw, 4.5rem); line-height: 1.02; letter-spacing: -0.035em; font-weight: 800;
  margin: 22px 0 0;
}
.hero-title .grad { background: var(--trail); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { font-size: clamp(1.05rem, 2.1vw, 1.32rem); color: var(--ink-dim); max-width: 38ch; margin: 22px 0 0; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero-fine { margin: 16px 0 0; color: var(--ink-faint); font-size: 0.85rem; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 20px 28px; margin-top: 30px; color: var(--ink-faint); font-size: 0.9rem; }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta svg { width: 16px; height: 16px; color: var(--emerald); }

/* Hero product mock: a stylized capture inspector */
.mock {
  position: relative; border-radius: var(--radius-lg); border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(20, 25, 63, 0.9), rgba(11, 9, 26, 0.92));
  box-shadow: var(--shadow); overflow: hidden;
}
.mock::after { content:""; position:absolute; inset:0; border-radius: inherit; pointer-events:none; box-shadow: inset 0 1px 0 rgba(255,255,255,0.08); }
.mock-bar { display: flex; align-items: center; gap: 8px; padding: 13px 16px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,0.02); }
.mock-bar .tl { width: 11px; height: 11px; border-radius: 50%; background: #ffffff20; }
.mock-bar .tl:nth-child(1) { background: #ff5f57; }
.mock-bar .tl:nth-child(2) { background: #febc2e; }
.mock-bar .tl:nth-child(3) { background: #28c840; }
.mock-bar .label { margin-left: 10px; font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-faint); }
.mock-body { display: grid; grid-template-columns: 1fr; }
.flow-row { display: grid; grid-template-columns: auto 1fr auto auto; gap: 12px; align-items: center; padding: 11px 16px; border-bottom: 1px solid var(--line); font-family: var(--font-mono); font-size: 0.8rem; }
.flow-row.sel { background: linear-gradient(90deg, rgba(139,92,246,0.14), rgba(6,182,212,0.06)); box-shadow: inset 2px 0 0 var(--cyan); }
.verb { font-weight: 700; padding: 2px 7px; border-radius: 6px; font-size: 0.72rem; }
.verb.get { color: #34d399; background: rgba(16,185,129,0.14); }
.verb.post { color: #fbbf24; background: rgba(251,191,36,0.14); }
.verb.put { color: #60a5fa; background: rgba(59,130,246,0.16); }
.flow-host { color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.flow-host .dim { color: var(--ink-faint); }
.code200 { color: #34d399; } .code301 { color: #fbbf24; }
.flow-row .lock { color: var(--gold); }
.flow-time { color: var(--ink-faint); }
.mock-inspect { padding: 16px; font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-dim); background: rgba(0,0,0,0.18); }
.mock-inspect .k { color: var(--violet); }
.mock-inspect .s { color: var(--emerald); }
.mock-inspect .row { display: flex; gap: 8px; padding: 2px 0; }
.mock-tabs { display: flex; gap: 16px; padding: 10px 16px 0; font-family: var(--font-mono); font-size: 0.74rem; color: var(--ink-faint); }
.mock-tabs .on { color: var(--cyan); border-bottom: 2px solid var(--cyan); padding-bottom: 8px; }

/* ---------- Trail divider ---------- */
.trail-rule { height: 3px; border: 0; border-radius: 3px; background: var(--trail); opacity: 0.85; margin: 0; }
.trail-rule.glow { box-shadow: 0 0 24px rgba(56,189,248,0.5); }

/* ---------- Section scaffolding ---------- */
section { position: relative; padding: clamp(56px, 9vw, 104px) 0; }
.section-head { max-width: 60ch; margin-bottom: clamp(34px, 5vw, 56px); }
.kicker { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--cyan); margin: 0 0 14px; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.7rem); line-height: 1.08; letter-spacing: -0.025em; font-weight: 800; margin: 0; }
h2 .grad { background: var(--trail); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--ink-dim); font-size: 1.08rem; margin-top: 16px; }

/* Pillars */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 820px) { .pillars { grid-template-columns: 1fr; } }
.pillar { padding: 26px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel); }
.pillar h3 { margin: 14px 0 6px; font-size: 1.16rem; letter-spacing: -0.01em; }
.pillar p { margin: 0; color: var(--ink-dim); font-size: 0.97rem; }
.pillar .ic { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 11px; background: var(--panel-2); border: 1px solid var(--line); }
.pillar .ic svg { width: 22px; height: 22px; }

/* Feature grid */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 980px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .features { grid-template-columns: 1fr; } }
.card {
  position: relative; padding: 24px; border-radius: var(--radius); border: 1px solid var(--line);
  background: var(--panel); transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--line-strong); background: var(--panel-2); }
.card .ic { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 10px; margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(139,92,246,0.2), rgba(6,182,212,0.14)); border: 1px solid var(--line); }
.card .ic svg { width: 21px; height: 21px; color: #c4b5fd; }
.card h3 { margin: 0 0 8px; font-size: 1.1rem; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--ink-dim); font-size: 0.95rem; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 980px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding: 26px 22px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel); }
.step .num { font-family: var(--font-mono); font-size: 0.82rem; font-weight: 700; width: 34px; height: 34px; display: grid; place-items: center;
  border-radius: 50%; color: #050410; background: var(--trail); margin-bottom: 16px; }
.step h3 { margin: 0 0 8px; font-size: 1.06rem; }
.step p { margin: 0; color: var(--ink-dim); font-size: 0.94rem; }
.step code { font-family: var(--font-mono); font-size: 0.82em; color: var(--cyan); background: rgba(6,182,212,0.1); padding: 1px 6px; border-radius: 5px; }

/* Privacy band */
.band {
  border-radius: var(--radius-lg); border: 1px solid var(--line-strong); overflow: hidden;
  background: linear-gradient(135deg, rgba(20,25,63,0.7), rgba(15,51,70,0.5));
  padding: clamp(32px, 5vw, 56px); display: grid; grid-template-columns: auto 1fr; gap: 30px; align-items: center;
}
@media (max-width: 760px) { .band { grid-template-columns: 1fr; text-align: left; } }
.band .shield { width: 84px; height: 84px; flex: none; display: grid; place-items: center; border-radius: 20px;
  background: linear-gradient(135deg, var(--gold), var(--gold-2)); box-shadow: 0 16px 40px -12px rgba(245,158,11,0.55); }
.band .shield svg { width: 44px; height: 44px; color: #1a1206; }
.band h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
.band p { color: var(--ink-dim); margin: 12px 0 0; max-width: 62ch; }
.band .actions { margin-top: 20px; display: flex; gap: 14px; flex-wrap: wrap; }

/* Platforms */
.platforms { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 760px) { .platforms { grid-template-columns: 1fr; } }
.plat { padding: 28px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel); }
.plat h3 { margin: 0 0 6px; display: flex; align-items: center; gap: 10px; font-size: 1.2rem; }
.plat h3 svg { width: 22px; height: 22px; color: var(--cyan); }
.plat p { color: var(--ink-dim); margin: 0 0 14px; font-size: 0.96rem; }
.plat ul { margin: 0; padding-left: 0; list-style: none; }
.plat li { position: relative; padding-left: 26px; color: var(--ink-dim); font-size: 0.92rem; margin: 7px 0; }
.plat li::before { content: ""; position: absolute; left: 4px; top: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--trail); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: clamp(40px, 7vw, 90px); padding: 52px 0 40px; }
.foot-grid { display: flex; flex-wrap: wrap; gap: 28px; justify-content: space-between; align-items: flex-start; }
.foot-brand { max-width: 30ch; }
.foot-brand .brand { margin-bottom: 12px; }
.foot-brand p { color: var(--ink-faint); font-size: 0.9rem; margin: 0; }
.foot-cols { display: flex; gap: 56px; flex-wrap: wrap; }
.foot-col h4 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); margin: 0 0 14px; }
.foot-col a { display: block; color: var(--ink-dim); font-size: 0.94rem; margin: 9px 0; }
.foot-col a:hover { color: var(--ink); }
.foot-bottom { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; color: var(--ink-faint); font-size: 0.86rem; }

/* ---------- Legal / prose pages ---------- */
.legal { padding: clamp(40px, 7vw, 80px) 0 40px; }
.legal-head { max-width: 760px; margin: 0 auto clamp(28px, 4vw, 44px); }
.legal-head h1 { font-size: clamp(2rem, 4.5vw, 3rem); letter-spacing: -0.03em; margin: 16px 0 10px; font-weight: 800; }
.legal-head .updated { font-family: var(--font-mono); font-size: 0.84rem; color: var(--ink-faint); }
.legal-head .back { font-family: var(--font-mono); font-size: 0.84rem; }
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { font-size: clamp(1.3rem, 2.6vw, 1.7rem); margin: 44px 0 12px; letter-spacing: -0.02em; }
.prose h3 { font-size: 1.12rem; margin: 28px 0 8px; color: var(--ink); }
.prose p, .prose li { color: var(--ink-dim); font-size: 1rem; }
.prose ul { padding-left: 22px; }
.prose li { margin: 8px 0; }
.prose li::marker { color: var(--cyan); }
.prose strong { color: var(--ink); }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose code { font-family: var(--font-mono); font-size: 0.86em; color: var(--cyan); background: rgba(6,182,212,0.1); padding: 1px 6px; border-radius: 5px; }
.callout {
  border: 1px solid var(--line-strong); border-left: 3px solid var(--gold); border-radius: 12px;
  background: rgba(251, 191, 36, 0.06); padding: 18px 20px; margin: 24px 0;
}
.callout p { margin: 0; color: var(--ink); }
.callout strong { color: var(--gold); }
.toc {
  border: 1px solid var(--line); border-radius: 14px; background: var(--panel); padding: 20px 24px; margin-bottom: 36px;
}
.toc h4 { margin: 0 0 12px; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); }
.toc ol { margin: 0; padding-left: 20px; columns: 2; column-gap: 32px; }
@media (max-width: 600px) { .toc ol { columns: 1; } }
.toc a { color: var(--ink-dim); font-size: 0.92rem; }
.toc a:hover { color: var(--ink); }

/* Reveal-on-scroll (progressive enhancement; safe without JS) */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ---------- Language switcher ---------- */
.lang { display: inline-flex; align-items: center; gap: 7px; font-size: 0.9rem; }
.lang a { color: var(--ink-faint); font-weight: 600; padding: 2px 3px; }
.lang a:hover { color: var(--ink-dim); }
.lang a[aria-current="page"] { color: var(--ink); }
.lang .sep { color: var(--line-strong); }