/* Ebike Support Index
   Design intent: a field manual, not a magazine. Riders may open this on a
   phone at the side of a road, so contrast is high, tap targets are large, and
   nothing important is carried by color alone. */

:root {
  --bg: #faf9f7;
  --surface: #ffffff;
  --ink: #1a1917;
  --ink-soft: #55514b;
  --ink-faint: #857f76;
  --rule: #e3ded6;
  --accent: #1f5f4f;
  --accent-soft: #e8f1ee;
  --warn: #8a5a00;
  --warn-soft: #fdf3e0;
  --stop: #9c2b1e;
  --stop-soft: #fbeae7;
  --radius: 10px;
  --maxw: 62rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171a;
    --surface: #1d1f23;
    --ink: #eceae6;
    --ink-soft: #b3aea6;
    --ink-faint: #8a857d;
    --rule: #32353b;
    --accent: #6fbba4;
    --accent-soft: #1b2f2a;
    --warn: #e0a94a;
    --warn-soft: #2e2617;
    --stop: #e8837a;
    --stop-soft: #331d1a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

#app {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.1rem 4rem;
}

a { color: var(--accent); }

/* ---------------------------------------------------------------- header */

.site-head {
  padding: 1.6rem 0 1rem;
  border-bottom: 2px solid var(--ink);
}
.brand { display: block; text-decoration: none; color: inherit; }
.brand-name {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-tag { display: block; color: var(--ink-soft); font-size: 0.9rem; margin-top: 0.15rem; }
.principles { margin-top: 0.8rem; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.principle {
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
}

/* ------------------------------------------------------------------- nav */

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}
.nav-link {
  padding: 0.5rem 0.7rem;
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.9rem;
  border-radius: 6px;
}
.nav-link:hover { background: var(--surface); color: var(--ink); }
.nav-link.active { color: var(--ink); font-weight: 650; background: var(--accent-soft); }

/* ---------------------------------------------------------------- search */

.search { margin: 1rem 0 0.5rem; }
.search input {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-size: 1rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}
.search input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.search-list { list-style: none; margin: 0.6rem 0 0; padding: 0; }
.search-list li {
  display: flex; align-items: baseline; gap: 0.5rem;
  padding: 0.45rem 0; border-bottom: 1px solid var(--rule);
}

/* --------------------------------------------------------------- blocks */

.block {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem;
  margin: 1rem 0;
}
.block.hero { border: none; background: none; padding: 1.2rem 0 0; }
.block.note { background: var(--accent-soft); border-color: transparent; }
h1 { font-size: 1.5rem; line-height: 1.3; margin: 0.2rem 0 0.6rem; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; margin: 1.4rem 0 0.5rem; }
h3 { font-size: 1rem; margin: 0 0 0.5rem; }
h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em;
     color: var(--ink-faint); margin: 0 0 0.4rem; }
.block > h2:first-child { margin-top: 0; }
p { margin: 0 0 0.8rem; }
.lede { font-size: 1.08rem; }
.muted { color: var(--ink-soft); }
.small { font-size: 0.88rem; }
.inline-link { font-weight: 600; text-decoration: none; }
.inline-link:hover { text-decoration: underline; }

/* ------------------------------------------------------------ home cards */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.7rem;
}
.card {
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 0.9rem;
  background: var(--bg);
}
.card:hover { border-color: var(--accent); }
.card-empty { opacity: 0.72; }
.card-key {
  display: inline-block;
  font-weight: 700;
  font-size: 0.7rem;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 3px;
  padding: 0.1rem 0.4rem;
  margin-bottom: 0.4rem;
}
.card-key.big { font-size: 0.8rem; }
.card h3 { margin: 0 0 0.3rem; }
.card-meta { font-size: 0.8rem; color: var(--ink-faint); margin: 0.5rem 0 0; }

.qh-mini { list-style: none; margin: 0; padding: 0; }
.qh-mini li {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.55rem 0; border-bottom: 1px solid var(--rule);
}
.qh-mini li:last-child { border-bottom: none; }
.qh-link { text-decoration: none; font-weight: 600; }
.qh-link:hover { text-decoration: underline; }

.tag {
  font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.06em;
  font-weight: 700; color: var(--accent); background: var(--accent-soft);
  padding: 0.1rem 0.35rem; border-radius: 3px; white-space: nowrap;
}
.tag-muted { color: var(--ink-faint); background: var(--rule); }
.tag-link { text-decoration: none; }

/* ------------------------------------------------------------ quick help */

.qh-entry h3 { font-size: 1.12rem; }
.checks { margin: 0.5rem 0 0.8rem; padding-left: 1.3rem; }
.checks li { margin-bottom: 0.25rem; }
.caveat {
  background: var(--warn-soft); color: var(--warn);
  padding: 0.6rem 0.8rem; border-radius: 6px; font-size: 0.92rem;
  border-left: 3px solid var(--warn); margin-bottom: 0.8rem;
}
.stop {
  background: var(--stop-soft); color: var(--stop);
  padding: 0.6rem 0.8rem; border-radius: 6px; font-weight: 600;
  border-left: 3px solid var(--stop); margin-bottom: 0.8rem;
}

/* -------------------------------------------------------------- articles */

.crumbs { font-size: 0.85rem; padding: 0.8rem 0 0; color: var(--ink-faint); }
.crumbs a { text-decoration: none; }
.crumb-sep { color: var(--ink-faint); }

.prov { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.badge {
  font-size: 0.72rem; font-weight: 650; padding: 0.22rem 0.5rem;
  border-radius: 4px; border: 1px solid transparent;
}
.badge.small { font-size: 0.66rem; }
.conf-high { color: var(--accent); background: var(--accent-soft); }
.conf-medium { color: var(--warn); background: var(--warn-soft); }
.conf-needs-verification { color: var(--stop); background: var(--stop-soft); }
.ver-ok { color: var(--accent); background: var(--accent-soft); }
.ver-warn { color: var(--warn); background: var(--warn-soft); }
.prov-note {
  flex-basis: 100%; font-size: 0.85rem; color: var(--ink-soft);
  margin: 0.3rem 0 0; font-style: italic;
}
.short {
  border-left: 3px solid var(--accent);
  padding: 0.2rem 0 0.2rem 0.9rem;
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
}
.short p { margin: 0; }
.article p { max-width: 42rem; }
.checks-list { padding-left: 1.2rem; }
.checks-list li { margin-bottom: 0.35rem; }
.safety {
  background: var(--stop-soft); border-radius: var(--radius);
  padding: 0.9rem 1rem; margin: 1.2rem 0;
}
.safety h2 { margin-top: 0; color: var(--stop); }
.safety p { margin-bottom: 0; }

.art-list, .queue, .standard, .cautions, .roadmap, .leads, .sources { padding-left: 1.2rem; }
.art-list { list-style: none; padding-left: 0; }
.art-list li {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem;
  padding: 0.6rem 0; border-bottom: 1px solid var(--rule);
}
.art-link { font-weight: 600; text-decoration: none; }
.art-link:hover { text-decoration: underline; }
.queue { list-style: none; padding-left: 0; }
.queue li {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem;
  padding: 0.4rem 0; border-bottom: 1px solid var(--rule);
  color: var(--ink-soft);
}
.standard li, .cautions li, .roadmap li, .leads li { margin-bottom: 0.45rem; }

/* ----------------------------------------------------------- calculators */

.calc-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.8rem;
  margin: 1rem 0;
}
.field { display: flex; flex-direction: column; gap: 0.25rem; }
.field-label { font-size: 0.85rem; font-weight: 600; }
.field input {
  padding: 0.55rem 0.7rem; font-size: 1rem;
  color: var(--ink); background: var(--bg);
  border: 1px solid var(--rule); border-radius: 6px;
}
.field input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.field-hint { font-size: 0.76rem; color: var(--ink-faint); line-height: 1.4; }

.output {
  border-top: 1px solid var(--rule);
  margin-top: 1rem;
  padding-top: 1rem;
}
.big-number {
  font-size: 1.9rem; font-weight: 700; letter-spacing: -0.02em;
  color: var(--accent); margin: 0 0 0.4rem;
}
.big-number.fail { color: var(--stop); }
.big-number.pass { color: var(--accent); }
.breakdown { list-style: none; padding: 0; margin: 0 0 0.8rem; }
.breakdown li {
  padding: 0.3rem 0; border-bottom: 1px solid var(--rule); font-size: 0.92rem;
}
.assumptions {
  background: var(--bg); border: 1px dashed var(--rule);
  border-radius: 6px; padding: 0.8rem 0.9rem; margin-top: 0.8rem;
}
.assumptions dl {
  margin: 0; display: grid; grid-template-columns: minmax(8rem, auto) 1fr; gap: 0.3rem 0.8rem;
}
.assumptions dt { font-weight: 650; font-size: 0.85rem; }
.assumptions dd { margin: 0; font-size: 0.85rem; color: var(--ink-soft); }

/* -------------------------------------------------------------- roadmap */

.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 0.7rem; margin-bottom: 1rem;
}
.stat {
  background: var(--bg); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 0.8rem;
}
.stat-n { display: block; font-size: 1.7rem; font-weight: 700; line-height: 1.1; }
.stat-l { display: block; font-size: 0.78rem; color: var(--ink-faint); }

/* ------------------------------------------------------------- templates */

.template blockquote {
  margin: 0; padding: 0.8rem 1rem;
  background: var(--bg); border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0; font-size: 0.97rem;
}

/* ----------------------------------------------------------------- tests */

.test-list { list-style: none; padding: 0; margin: 0.8rem 0 0; }
.test-list li {
  display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: baseline;
  padding: 0.35rem 0; border-bottom: 1px solid var(--rule); font-size: 0.9rem;
}
.tmark { font-weight: 700; width: 1rem; }
.tpass .tmark { color: var(--accent); }
.tfail { color: var(--stop); }
.tfail .tmark { color: var(--stop); }
.terr { flex-basis: 100%; font-size: 0.8rem; color: var(--stop); }

/* ---------------------------------------------------------------- footer */

.site-foot {
  margin-top: 2.5rem; padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.87rem; color: var(--ink-faint);
}

@media (max-width: 34rem) {
  .brand-name { font-size: 1.35rem; }
  .block { padding: 1rem; }
  .nav-link { padding: 0.45rem 0.55rem; font-size: 0.85rem; }
  .assumptions dl { grid-template-columns: 1fr; gap: 0.1rem; }
  .assumptions dt { margin-top: 0.4rem; }
}