* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --border: #334155;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --green: #22c55e;
  --light-green: #86efac;
  --yellow: #facc15;
  --orange: #f97316;
  --red: #ef4444;
  --blue: #3b82f6;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.container { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }

header {
  text-align: center;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

header h1 { font-size: 2rem; margin-bottom: 0.5rem; }
header h1 span { color: var(--green); }
header p { color: var(--text-dim); font-size: 1rem; }

.controls {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.search {
  flex: 1;
  min-width: 200px;
  padding: 0.6rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
}

.search:focus { border-color: var(--blue); }

.filter-group { display: flex; gap: 0.4rem; align-items: center; }

.filter-btn {
  padding: 0.4rem 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.15s;
}

.filter-btn:hover { border-color: var(--text-dim); color: var(--text); }
.filter-btn.active { border-color: var(--blue); color: var(--blue); background: rgba(59,130,246,0.1); }

.sort-select {
  padding: 0.5rem 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
}

.stats {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-dim);
  font-size: 0.9rem;
  align-items: center;
  flex-wrap: wrap;
}

.stats strong { color: var(--text); }

.submit-btn {
  margin-left: auto;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--green);
  border-radius: 6px;
  color: var(--green);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.15s;
}

.submit-btn:hover {
  background: rgba(34,197,94,0.1);
  text-decoration: none;
}

.skill-list { display: flex; flex-direction: column; gap: 0.6rem; }

.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  cursor: pointer;
  transition: border-color 0.15s;
}

.skill-card:hover { border-color: var(--text-dim); }

.skill-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.4rem;
}

.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.grade-A { background: rgba(34,197,94,0.15); color: var(--green); }
.grade-B { background: rgba(134,239,172,0.15); color: var(--light-green); }
.grade-C { background: rgba(250,204,21,0.15); color: var(--yellow); }
.grade-D { background: rgba(249,115,22,0.15); color: var(--orange); }
.grade-F { background: rgba(239,68,68,0.15); color: var(--red); }

.skill-name { font-weight: 600; font-size: 1.05rem; }
.skill-score { color: var(--text-dim); font-size: 0.85rem; margin-left: auto; }
.skill-desc { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 0.5rem; padding-left: 3.2rem; }
.skill-meta { display: flex; gap: 1rem; padding-left: 3.2rem; font-size: 0.8rem; color: var(--text-dim); align-items: center; flex-wrap: wrap; }

.source-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.source-official { background: rgba(250,204,21,0.15); color: var(--yellow); }
.source-local { background: rgba(34,197,94,0.15); color: var(--green); }
.source-community { background: rgba(59,130,246,0.1); color: var(--blue); }

.category-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  background: rgba(139,92,246,0.1);
  color: var(--purple, #a78bfa);
}
.skill-meta a { color: var(--blue); text-decoration: none; }
.skill-meta a:hover { text-decoration: underline; }

.skill-details {
  display: none;
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border);
  padding-left: 3.2rem;
}

.skill-card.expanded .skill-details { display: block; }

.dim-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.3rem;
  font-size: 0.85rem;
}

.dim-label { width: 90px; color: var(--text-dim); }

.dim-bar {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.dim-bar-fill { height: 100%; border-radius: 3px; transition: width 0.3s; }

.dim-score { width: 30px; text-align: right; font-size: 0.8rem; }

.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-dim);
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  font-size: 0.9rem;
}

.pagination button {
  padding: 0.4rem 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  font-size: 0.85rem;
}

.pagination button:hover { border-color: var(--text-dim); }
.pagination button:disabled { opacity: 0.3; cursor: default; }
.pagination .page-info { color: var(--text-dim); }

footer {
  text-align: center;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.85rem;
}

footer a { color: var(--blue); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media (max-width: 640px) {
  .controls { flex-direction: column; }
  .skill-desc, .skill-meta, .skill-details { padding-left: 0; }
}