/* Theme tokens. Default = light. Dark applies via system preference (unless the
   user has forced light) or via an explicit [data-theme="dark"] toggle. */
:root {
  --bg: #fafaf9;
  --bg-elev: #ffffff;
  --fg: #1c1917;
  --muted: #78716c;
  --line: #e7e5e4;
  --card: #ffffff;
  --hover: #f5f5f4;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --good: #16a34a;
  --good-bg: #f0fdf4;
  --bad: #dc2626;
  --bad-bg: #fef2f2;
  --shadow: 0 1px 2px rgba(0, 0, 0, .06);
  --badge-bg: transparent;
}

/* Shared dark palette. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0a09;
    --bg-elev: #1c1917;
    --fg: #e7e5e4;
    --muted: #a8a29e;
    --line: #292524;
    --card: #1c1917;
    --hover: #292524;
    --accent: #3b82f6;
    --accent-fg: #ffffff;
    --good: #22c55e;
    --good-bg: #14271b;
    --bad: #ef4444;
    --bad-bg: #2a1416;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
    --badge-bg: #0c0a09;
  }
}
:root[data-theme="dark"] {
  --bg: #0c0a09;
  --bg-elev: #1c1917;
  --fg: #e7e5e4;
  --muted: #a8a29e;
  --line: #292524;
  --card: #1c1917;
  --hover: #292524;
  --accent: #3b82f6;
  --accent-fg: #ffffff;
  --good: #22c55e;
  --good-bg: #14271b;
  --bad: #ef4444;
  --bad-bg: #2a1416;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  --badge-bg: #0c0a09;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0 auto;
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
  max-width: 44rem;
  padding: 1.5rem 1rem 4rem;
  transition: background-color .2s ease, color .2s ease;
}

header { display: flex; align-items: flex-start; gap: 1rem; }
header .titles { flex: 1; min-width: 0; }
header h1 { margin: 0; font-size: 1.6rem; }
header .tag { margin: .2rem 0 1rem; color: var(--muted); }

#theme-toggle {
  flex: none; margin-top: .25rem;
  width: 2.4rem; height: 2.4rem; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--fg);
  font-size: 1.1rem; cursor: pointer; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
}
#theme-toggle:hover { background: var(--hover); }

.tabs { display: flex; gap: .25rem; border-bottom: 1px solid var(--line); margin-bottom: 1.25rem; }
.tab {
  background: none; border: none; padding: .6rem .9rem; font-size: .95rem;
  color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent;
}
.tab.active { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }

.panel { display: none; }
.panel.active { display: block; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 1.5rem; min-height: 9rem; box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 .5rem; font-size: 1.25rem; line-height: 1.3; overflow-wrap: anywhere; }
.card .summary { margin: 0 0 1rem; overflow-wrap: anywhere; }
.card .rationale {
  margin: 0 0 1rem; padding-left: .8rem; border-left: 3px solid var(--line);
  color: var(--muted); font-style: italic; overflow-wrap: anywhere;
}
.card .meta { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.card .score { font-variant-numeric: tabular-nums; font-size: .85rem; color: var(--muted); }
.card a.visit { color: var(--accent); font-weight: 600; text-decoration: none; overflow-wrap: anywhere; }
.card a.visit:hover { text-decoration: underline; }

.actions { display: flex; gap: .6rem; margin: 1rem 0 .25rem; flex-wrap: wrap; }
.btn {
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--fg);
  border-radius: 8px; padding: .55rem .9rem; font-size: 1rem; cursor: pointer;
}
.btn:hover { background: var(--hover); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); margin-left: auto; }
.btn.primary:hover { filter: brightness(1.05); }
.btn.vote { font-size: 1.2rem; }
.btn.vote.liked { border-color: var(--good); background: var(--good-bg); }
.btn.vote.disliked { border-color: var(--bad); background: var(--bad-bg); }

.msg { min-height: 1.4rem; color: var(--muted); font-size: .9rem; }
.muted { color: var(--muted); }

.seed-form { display: flex; gap: .5rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.seed-form input {
  flex: 1; min-width: 12rem; padding: .55rem .7rem; border: 1px solid var(--line);
  border-radius: 8px; font-size: 1rem; background: var(--bg-elev); color: var(--fg);
}
.seed-list { list-style: none; padding: 0; margin: 0; }
.seed-list li {
  display: flex; align-items: center; gap: .5rem; padding: .6rem .25rem;
  border-bottom: 1px solid var(--line);
}
.seed-list .seed-url { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.seed-list .badge {
  flex: none; font-size: .7rem; text-transform: uppercase; letter-spacing: .03em;
  color: var(--muted); border: 1px solid var(--line); border-radius: 999px;
  padding: .05rem .5rem; background: var(--badge-bg);
}
.seed-list .del { flex: none; color: var(--bad); background: none; border: none; cursor: pointer; font-size: 1.1rem; }

.history-list { list-style: none; padding: 0; margin: 0; }
.history-item { display: flex; gap: .75rem; align-items: flex-start; padding: .85rem .25rem; border-bottom: 1px solid var(--line); }
.hi-main { flex: 1; min-width: 0; }
.hi-title { color: var(--accent); font-weight: 600; text-decoration: none; overflow-wrap: anywhere; }
.hi-title:hover { text-decoration: underline; }
.hi-sub { color: var(--muted); font-size: .8rem; margin-top: .15rem; }
.hi-summary { font-size: .9rem; margin-top: .35rem; overflow-wrap: anywhere; }
.hi-votes { flex: none; display: flex; gap: .35rem; }
.hi-votes .btn.vote { font-size: 1rem; padding: .35rem .55rem; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(6.5rem, 1fr)); gap: .75rem; margin-bottom: 1rem; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: .9rem; text-align: center; }
.stat .n { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat .k { font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }

footer { margin-top: 2rem; text-align: center; font-size: .8rem; overflow-wrap: anywhere; }

/* --- Responsive: phones --- */
@media (max-width: 480px) {
  body { padding: 1rem .85rem 3rem; }
  header h1 { font-size: 1.35rem; }
  .tabs { gap: 0; }
  .tab { flex: 1; padding: .6rem .25rem; text-align: center; font-size: .9rem; }
  .card { padding: 1.15rem; }
  .actions .btn.vote { flex: 1; }
  .actions .btn.primary { flex-basis: 100%; margin-left: 0; }
  .seed-form .btn.primary { flex: 1; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat .n { font-size: 1.4rem; }
}

/* Respect reduced-motion. */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}