/* LLM Pricing Tracker — Chinese-friendly style */

:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --border: #e5e7eb;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --accent: #2563eb;
  --accent-light: #eff6ff;
  --price: #059669;
  --price-up: #dc2626;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-mono: Menlo, "SF Mono", "PingFang SC", monospace;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-size: 14px;
}

/* Header */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.header-inner {
  max-width: 1500px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
}
.header h1 { font-size: 1.2rem; font-weight: 700; letter-spacing: .02em; display: flex; align-items: center; gap: 8px; }
.logo-icon { flex-shrink: 0; }
.subtitle { font-size: .82rem; color: var(--text-secondary); }
.rate-badge-inline {
  font-size: .78rem; color: var(--text-secondary); margin-left: 8px;
}
.header-meta { display: flex; gap: 12px; align-items: center; }
.update-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 10px; border-radius: 16px;
  font-size: .75rem; color: var(--text-secondary);
  background: var(--bg); border: 1px solid var(--border);
}

/* Main */
.main { max-width: 1500px; margin: 0 auto; padding: 16px 20px 60px; }

/* Controls */
.controls { display: flex; flex-direction: column; gap: 10px; margin-bottom: 14px; }
.controls-row {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}

.search-box {
  position: relative; width: 260px;
}
.search-icon {
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  color: var(--text-secondary); pointer-events: none;
}
#search-input {
  width: 100%; padding: 8px 32px 8px 34px;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: .85rem; font-family: inherit;
  background: var(--surface); transition: border-color .15s;
}
#search-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
#search-input::placeholder { color: #9ca3af; }
.search-clear {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer; color: var(--text-secondary);
  padding: 4px; border-radius: 4px; display: flex;
}
.search-clear:hover { color: var(--text); }

/* Tier filter */
.tier-filters { display: flex; gap: 4px; }
.tier-btn {
  padding: 6px 14px; border: 1px solid var(--border); border-radius: 6px;
  font-size: .8rem; font-family: inherit; cursor: pointer;
  background: var(--surface); color: var(--text-secondary);
  transition: all .15s; white-space: nowrap;
}
.tier-btn:hover { border-color: var(--accent); color: var(--accent); }
.tier-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Provider dropdown */
.provider-dropdown { position: relative; }
.dropdown-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px; border: 1px solid var(--border); border-radius: var(--radius);
  font-size: .82rem; font-family: inherit; cursor: pointer;
  background: var(--surface); white-space: nowrap;
  transition: border-color .15s;
}
.dropdown-toggle:hover { border-color: var(--accent); }
.dropdown-arrow { transition: transform .2s; }
.dropdown-toggle.open .dropdown-arrow { transform: rotate(180deg); }

.dropdown-menu {
  position: absolute; top: calc(100% + 4px); left: 0; z-index: 50;
  min-width: 280px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 4px 16px rgba(0,0,0,.1); padding: 8px;
}
.dropdown-search {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 10px; border: 1px solid var(--border);
  border-radius: 6px; margin-bottom: 6px;
}
.dropdown-search svg { color: var(--text-secondary); flex-shrink: 0; }
.dropdown-search input {
  border: none; outline: none; font-size: .82rem; font-family: inherit;
  width: 100%; background: transparent;
}
.dropdown-actions {
  display: flex; gap: 6px; margin-bottom: 6px; padding: 0 2px;
}
.dropdown-action {
  font-size: .75rem; padding: 2px 8px; border: none; border-radius: 4px;
  cursor: pointer; background: var(--bg); color: var(--text-secondary);
  font-family: inherit;
}
.dropdown-action:hover { color: var(--accent); background: var(--accent-light); }
.dropdown-list { max-height: 220px; overflow-y: auto; }
.dropdown-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 8px; border-radius: 4px; cursor: pointer;
  font-size: .82rem; transition: background .1s;
}
.dropdown-item:hover { background: var(--bg); }
.dropdown-item input[type="checkbox"] { accent-color: var(--accent); }
.dropdown-item .dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dropdown-item .count { font-size: .72rem; color: var(--text-secondary); margin-left: auto; }
.dropdown-no-results {
  padding: 12px; text-align: center; font-size: .8rem; color: var(--text-secondary);
}

/* Stats */
.stats-bar {
  font-size: .78rem; color: var(--text-secondary);
  display: flex; align-items: center;
}

/* Table */
.table-wrap {
  overflow-x: auto; border-radius: var(--radius);
  box-shadow: var(--shadow); background: var(--surface);
  border: 1px solid var(--border);
}
#pricing-table { width: 100%; border-collapse: collapse; font-size: .84rem; }
#pricing-table thead { background: #f9fafb; }
#pricing-table th {
  padding: 10px 14px; text-align: left; font-weight: 600;
  color: var(--text-secondary); font-size: .76rem; white-space: nowrap;
  border-bottom: 2px solid var(--border); cursor: pointer;
  user-select: none; transition: color .15s;
}
#pricing-table th:hover { color: var(--text); }
#pricing-table th.num { text-align: right; }
#pricing-table th.sort-asc::after { content: ' ↑'; color: var(--accent); }
#pricing-table th.sort-desc::after { content: ' ↓'; color: var(--accent); }
#pricing-table th.sort-default { color: var(--text); }

#pricing-table td {
  padding: 9px 14px; border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
#pricing-table tbody tr { transition: background .1s; }
#pricing-table tbody tr:hover { background: var(--accent-light); }
#pricing-table tbody tr.row-expanded { background: var(--accent-light); }
#pricing-table td.num { text-align: right; font-family: var(--font-mono); font-size: .82rem; }
#pricing-table td.price-na { color: #d1d5db; }

/* Expanded chart row */
.chart-row td { padding: 0; border-bottom: 2px solid var(--border); }
.chart-panel {
  padding: 14px 20px; display: flex; gap: 16px; flex-wrap: wrap;
  align-items: flex-start;
}
.chart-area { flex: 1; min-width: 360px; }
.chart-info { min-width: 140px; font-size: .78rem; }
.chart-info table { width: 100%; border-collapse: collapse; }
.chart-info th, .chart-info td { padding: 3px 8px; text-align: left; font-size: .76rem; }
.chart-info th { color: var(--text-secondary); font-weight: 500; }

/* Provider badge */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 8px; border-radius: 10px; font-size: .76rem; font-weight: 600;
  white-space: nowrap;
}
.badge-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.badge-tier {
  font-size: .65rem; padding: 1px 5px; border-radius: 3px;
  background: var(--bg); color: var(--text-secondary); margin-left: 4px;
}

/* Model */
.model-name { font-weight: 600; }
.model-notes { font-size: .7rem; color: var(--text-secondary); display: block; }
.context { font-size: .8rem; font-family: var(--font-mono); }

/* Trend */
.sparkline-wrap { display: flex; align-items: center; justify-content: center; min-width: 70px; cursor: pointer; }
.sparkline-wrap svg { display: block; }
.trend-no-data { font-size: .72rem; color: #d1d5db; }
.trend-expand-hint { font-size: .65rem; color: var(--text-secondary); margin-left: 4px; }

/* Link */
.link-icon {
  color: var(--text-secondary); text-decoration: none; transition: color .15s;
  display: inline-flex; align-items: center;
}
.link-icon:hover { color: var(--accent); }

/* No results */
.no-results, .error-state {
  text-align: center; padding: 60px 20px; color: var(--text-secondary);
}
.no-results p:first-child, .error-state p:first-child { font-size: 1rem; font-weight: 600; color: var(--text); }
.hint { font-size: .82rem; margin-top: 4px; }

/* Price highlight */
.price-high { color: var(--price-up); }

/* Loading */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 37%, #f0f0f0 63%);
  background-size: 400% 100%; animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius);
}
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: -100% 0; } }

/* Footer */
.footer {
  text-align: center; padding: 16px; font-size: .76rem;
  color: var(--text-secondary); border-top: 1px solid var(--border);
}
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

.hidden { display: none !important; }

/* Responsive */
@media (max-width: 768px) {
  .header { padding: 12px 14px; }
  .header-inner { flex-direction: column; align-items: flex-start; }
  .header h1 { font-size: 1.05rem; }
  .main { padding: 10px 10px 40px; }
  .controls-row { width: 100%; }
  .search-box { width: 100%; }
  .table-wrap { border: none; border-radius: 0; box-shadow: none; }
  #pricing-table { font-size: .78rem; }
  #pricing-table th, #pricing-table td { padding: 6px 8px; }
  #pricing-table th { font-size: .7rem; }
  .chart-panel { flex-direction: column; }
}