/* ============================================================
   QuietHike — the ledger/diff aesthetic. A price change is a
   diff, so the whole site is styled like a verified git log,
   not a generic dark dashboard.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,600;9..144,700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* --- color tokens --- */
  --bg: #131d1a;
  --bg-raised: #1a2622;
  --ink: #e9e6df;
  --ink-soft: #9a9aa3;
  --diff-red: #c1533c;
  --diff-red-bg: #23181a;
  --diff-green: #5a9d6f;
  --diff-green-bg: #172420;
  --accent: #4fa89c;
  --line: #24322e;
  --line-strong: #34473f;

  /* --- type tokens --- */
  --font-display: 'Fraunces', serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius: 4px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 28px; }

/* ---------------- header ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(19, 29, 26, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--ink);
  display: flex; align-items: center; gap: 8px;
}
.logo:hover { text-decoration: none; }
.logo .mark { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); letter-spacing: -2px; }
.main-nav { display: flex; flex-wrap: wrap; gap: 26px; row-gap: 10px; }
.main-nav a {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--ink-soft); text-decoration: none;
}
.main-nav a:hover { color: var(--ink); }

/* ---------------- hero ---------------- */
.hero { padding: 68px 0 60px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: center; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); display: flex; align-items: center; gap: 10px; margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 20px; height: 1px; background: var(--accent); }
h1 {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.9rem, 3.6vw, 2.7rem); line-height: 1.15; letter-spacing: -0.01em;
  margin: 0 0 20px; color: var(--ink);
}
::selection { background: var(--accent); color: #0e1a18; }

.hero-sub { font-size: 1.04rem; color: var(--ink-soft); max-width: 48ch; margin: 0 0 30px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  font-family: var(--font-mono); font-size: 0.84rem; padding: 12px 20px;
  border-radius: var(--radius); display: inline-block; border: 1px solid var(--line-strong);
  user-select: none; min-height: 44px; box-sizing: border-box; display: inline-flex; align-items: center;
}
.btn-primary { background: var(--accent); color: #0e1a18; border-color: var(--accent); font-weight: 600; }
.btn-primary:hover { background: #66c2b5; text-decoration: none; }
.btn-ghost { color: var(--ink); border-color: #4a5f57; }
.btn-ghost:hover { background: var(--bg-raised); text-decoration: none; }

/* ---------------- diff card (hero signature element) ---------------- */
.diff-card {
  background: var(--bg-raised);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 18px 0;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  box-shadow: 0 20px 50px -20px rgba(0,0,0,0.6);
}
.diff-head {
  display: flex; justify-content: space-between; padding: 0 20px 14px;
  margin-bottom: 8px; border-bottom: 1px solid var(--line);
  color: var(--ink-soft); font-size: 0.76rem;
}
.diff-line { padding: 5px 20px; white-space: pre-wrap; }
.diff-line.diff-context { color: var(--ink-soft); opacity: 0.7; margin-top: 10px; }
.diff-line.diff-removed { background: var(--diff-red-bg); color: var(--diff-red); }
.diff-line.diff-added { background: var(--diff-green-bg); color: var(--diff-green); margin-bottom: 6px; }
.diff-label { color: var(--ink-soft); font-size: 0.82em; }

/* ---------------- sections ---------------- */
.section { padding: 60px 0; }
.section-head { margin-bottom: 36px; max-width: 60ch; }
.section-head .eyebrow { margin-bottom: 12px; }
h2 {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem); margin: 0 0 10px; letter-spacing: -0.01em;
}
.section-head p { color: var(--ink-soft); margin: 0; }

/* ---------------- log entries ---------------- */
.log-list { display: flex; flex-direction: column; gap: 28px; }
.log-entry {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-left: 3px solid var(--diff-red);
  border-radius: var(--radius);
  padding: 24px 26px;
}
.log-meta { display: flex; align-items: center; gap: 14px; margin-bottom: 10px; }
.log-date { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-soft); }
.log-tag {
  font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.05em;
  padding: 3px 8px; border-radius: 2px;
}
.tag-up { background: var(--diff-red-bg); color: var(--diff-red); }
.tag-down { background: var(--diff-green-bg); color: var(--diff-green); }
.tag-verified { background: rgba(79, 168, 156, 0.14); color: var(--accent); }
.tag-partial { background: rgba(154, 154, 163, 0.16); color: #c8cdd6; }
.src-tag { font-size: 0.72em; color: #b8c4c0; font-weight: 500; }
.log-entry h3 {
  font-family: var(--font-display); font-weight: 600; font-size: 1.15rem; margin: 0 0 14px; color: var(--ink);
}
.log-entry .diff-line { padding: 4px 12px; border-radius: 2px; margin-bottom: 3px; font-size: 0.84rem; }
.log-body { color: var(--ink-soft); font-size: 0.94rem; margin: 14px 0 10px; }
.log-source { font-family: var(--font-mono); font-size: 0.76rem; color: #b8c4c0; margin: 0; line-height: 1.6; }

/* ---------------- methodology ---------------- */
.method-list { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.method-list li {
  counter-increment: step;
  display: grid; grid-template-columns: 40px 1fr; gap: 18px;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
.method-list li:last-child { border-bottom: none; }
.method-list li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent);
  border: 1px solid var(--line-strong); border-radius: 50%;
  width: 32px; height: 32px; display: flex; align-items: center; justify-content: center;
}
.method-list h4 { margin: 2px 0 6px; font-family: var(--font-display); font-weight: 600; font-size: 1rem; color: var(--ink); }
.method-list p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; }

/* ---------------- footer ---------------- */
footer { border-top: 1px solid var(--line); padding: 40px 0; margin-top: 20px; }
.foot-grid { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.foot-disclosure { font-family: var(--font-mono); font-size: 0.74rem; color: var(--ink-soft); max-width: 52ch; line-height: 1.6; }
.foot-links { display: flex; gap: 20px; }
.foot-links a { font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft); }
.foot-links a:hover { color: var(--ink); }

/* ---------------- content pages (terms/privacy) ---------------- */
.page-hero { padding: 56px 0 40px; border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(1.7rem, 3.2vw, 2.3rem); margin: 0 0 12px; }
.page-hero p { color: var(--ink-soft); max-width: 56ch; margin: 0; }
.content { padding: 44px 0 64px; }
.content-narrow { max-width: 74ch; }
.content h2 { font-family: var(--font-display); font-weight: 600; font-size: 1.2rem; margin: 36px 0 12px; color: var(--ink); }
.content h2:first-child { margin-top: 0; }
.content p { color: var(--ink); margin: 0 0 14px; line-height: 1.65; }
.content ul, .content ol { color: var(--ink); margin: 0 0 14px; padding-left: 22px; }
.content li { margin-bottom: 6px; }
.content .updated {
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft);
  margin-bottom: 26px; display: inline-block; padding: 4px 10px;
  border: 1px solid var(--line-strong); border-radius: 2px;
}

/* ---------------- responsive ---------------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
}
@media (max-height: 800px) and (min-width: 861px) {
  .hero { padding: 48px 0 44px; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 18px; }
  .hero { padding: 48px 0 40px; }
  .diff-card { font-size: 0.78rem; }
  .main-nav { gap: 16px; }
  .main-nav a { font-size: 0.68rem; }
}