:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel2: #1c2330;
  --border: #2d333b;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --good: #3fb950;
  --warn: #d29922;
  --bad: #f85149;
  --score-a: #3fb950;
  --score-b: #58a6ff;
  --score-c: #d29922;
  --score-d: #f85149;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #101623, var(--bg));
  padding: 28px 0 20px;
}
.site-header h1 { margin: 0 0 4px; font-size: 26px; }
.tagline { margin: 0; color: var(--muted); font-size: 14px; }

.controls { padding: 16px 0; }

.topics { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.topic-btn {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  cursor: pointer;
  transition: all .15s ease;
}
.topic-btn:hover { border-color: var(--accent); }
.topic-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.toolbar input[type="search"] {
  flex: 1;
  min-width: 200px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
}
.toolbar select {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
}
.slider-label { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.slider-label output { color: var(--text); font-weight: 600; min-width: 2ch; }
.slider-label input[type="range"] { width: 110px; accent-color: var(--accent); }
.btn {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn.active { background: #2a3b52; border-color: var(--accent); }

.status { color: var(--muted); font-size: 13px; min-height: 20px; margin: 4px 0 12px; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
  padding-bottom: 32px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform .12s ease, border-color .12s ease;
}
.card:hover { transform: translateY(-2px); border-color: #3d4650; }

.card-top { display: flex; align-items: flex-start; gap: 12px; }
.pill-row { display: flex; flex-wrap: wrap; gap: 6px; }
.pill { font-size: 11px; border-radius: 6px; padding: 2px 8px; border: 1px solid transparent; font-weight: 600; }
.pill.comm { color: #ff9b9b; border-color: rgba(248,81,73,.45); background: rgba(248,81,73,.10); }
.pill.gap { color: #7ee787; border-color: rgba(63,185,80,.45); background: rgba(63,185,80,.10); }
.pill.gapval { color: var(--muted); border-color: var(--border); font-weight: 500; }

.ring {
  --pct: 0;
  --ring-color: var(--score-d);
  flex: 0 0 auto;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: conic-gradient(var(--ring-color) calc(var(--pct) * 1%), #262d38 0);
  display: grid;
  place-items: center;
}
.ring-inner {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--panel);
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 700;
}

.card-title { flex: 1; min-width: 0; }
.card-title h3 { margin: 0 0 4px; font-size: 15px; word-break: break-all; }
.card-title h3 a { color: var(--text); text-decoration: none; }
.card-title h3 a:hover { color: var(--accent); text-decoration: underline; }
.meta-row { display: flex; flex-wrap: wrap; gap: 10px; font-size: 12px; color: var(--muted); }
.meta-row .num { color: var(--text); font-weight: 600; }

.badge {
  display: inline-block;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 700;
  color: #0d1117;
}
.badge.A { background: var(--score-a); }
.badge.B { background: var(--score-b); }
.badge.C { background: var(--score-c); }
.badge.D { background: var(--score-d); color: #fff; }

.desc { font-size: 13px; color: var(--muted); margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

.factors { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-size: 11px;
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 6px;
  padding: 2px 7px;
}
.chip b { color: var(--text); }
.chip.hit { border-color: #3a5c8a; color: #9cc9ff; }
.chip.hit b { color: var(--accent); }

.card-actions { margin-top: auto; display: flex; justify-content: space-between; align-items: center; }
.insight { background: #0d1a2b; border: 1px solid #1e3a5f; border-radius: 8px; padding: 10px 12px; }
.insight-title { font-size: 12px; font-weight: 700; color: var(--accent); margin-bottom: 4px; }
.insight-reason { font-size: 12px; color: #b6c8dd; margin: 0 0 6px; line-height: 1.55; }
.save-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
}
.save-btn:hover { border-color: var(--warn); }
.save-btn.saved { border-color: var(--warn); color: var(--warn); background: rgba(210,153,34,.12); }
.card-grade { font-size: 12px; color: var(--muted); }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 18px 0 26px;
  color: var(--muted);
  font-size: 12px;
}
.site-footer p { margin: 4px 0; }

.empty { grid-column: 1 / -1; text-align: center; color: var(--muted); padding: 48px 0; }

@media (max-width: 640px) {
  .cards { grid-template-columns: 1fr; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .slider-label { justify-content: space-between; }
}