:root {
  --bg: #0f1419;
  --card: #1a2332;
  --border: #2d3a4f;
  --text: #e8edf5;
  --muted: #8b9cb3;
  --accent: #ff6b35;
  --accent2: #4ecdc4;
  --hot: #ff4757;
  --cold: #5352ed;
  --success: #2ed573;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(160deg, #0f1419 0%, #1a1f2e 50%, #0f1419 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  padding-bottom: calc(16px + var(--safe-bottom));
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 12px 32px;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

header h1 {
  font-size: 1.5rem;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header p {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 6px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}

.card h3 {
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.card .value,
.latest-number {
  font-size: 1.4rem;
  font-weight: 700;
}

.latest-number {
  font-size: 2rem;
  letter-spacing: 0.25em;
  color: var(--accent);
}

.muted {
  color: var(--muted);
  font-size: 0.8rem;
}

.toolbar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.count-picker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
  padding: 10px 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.count-picker-label {
  color: var(--muted);
  font-size: 0.85rem;
  white-space: nowrap;
}

.count-picker-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  flex: 1;
}

button.count-option {
  background: var(--border);
  color: var(--text);
  padding: 10px 6px;
  font-size: 0.85rem;
  min-height: 40px;
}

.count-picker-buttons.mode-picker-buttons {
  grid-template-columns: repeat(2, 1fr);
}

button.count-option.active {
  background: linear-gradient(135deg, var(--accent2), #3db8b0);
  color: #0f1419;
}

.count-picker-buttons.mode-picker-buttons {
  grid-template-columns: repeat(2, 1fr);
}

button.mode-option {
  background: var(--border);
  color: var(--text);
  padding: 10px 6px;
  font-size: 0.85rem;
  min-height: 40px;
}

button.mode-option.active {
  background: linear-gradient(135deg, #7c5cff, #5b8def);
  color: #fff;
}

button {
  background: linear-gradient(135deg, var(--accent), #e55a2b);
  color: #fff;
  border: none;
  padding: 12px 10px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
}

button.secondary {
  background: var(--border);
}

button:disabled {
  opacity: 0.5;
}

.status {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 16px;
  min-height: 24px;
}

.status.loading { color: var(--accent2); }
.status.error { color: var(--hot); }
.status.ok { color: var(--success); }

.gen-fingerprint {
  font-size: 0.78rem;
  line-height: 1.5;
  margin: -8px 0 16px;
  padding: 10px 12px;
  background: rgba(78, 205, 196, 0.08);
  border: 1px solid rgba(78, 205, 196, 0.2);
  border-radius: 10px;
  word-break: break-all;
}

.analysis {
  display: grid;
  gap: 10px;
  margin-bottom: 16px;
}

.digit-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  font-weight: 700;
}

.tag.hot {
  background: rgba(255, 71, 87, 0.2);
  color: var(--hot);
  border: 1px solid var(--hot);
}

.tag.cold {
  background: rgba(83, 82, 237, 0.2);
  color: var(--cold);
  border: 1px solid var(--cold);
}

.pos-label {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 8px;
}

.numbers-section h2 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.sort-note {
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 12px;
}

.badge {
  background: var(--accent2);
  color: var(--bg);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.num-item {
  background: rgba(78, 205, 196, 0.08);
  border: 1px solid rgba(78, 205, 196, 0.25);
  border-radius: 8px;
  padding: 8px 2px;
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
}

.num-item .idx {
  display: block;
  font-size: 0.6rem;
  color: var(--muted);
  letter-spacing: 0;
  margin-bottom: 2px;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.history-table th,
.history-table td {
  padding: 8px 6px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.history-table th {
  color: var(--muted);
}

.history-table td.num {
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent2);
}

.backtest-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-bottom: 12px;
}

.backtest-stat {
  color: var(--muted);
  font-size: 0.9rem;
}

.backtest-stat strong {
  color: var(--text);
  font-size: 1.1rem;
}

.hit-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.hit-badge.hit {
  background: rgba(46, 213, 115, 0.15);
  color: var(--success);
  border: 1px solid rgba(46, 213, 115, 0.45);
}

.hit-badge.miss {
  background: rgba(255, 71, 87, 0.12);
  color: var(--hot);
  border: 1px solid rgba(255, 71, 87, 0.35);
}

.backtest-stat.hint {
  width: 100%;
  font-size: 0.78rem;
}

.rules-card {
  grid-column: 1 / -1;
}

.indicator-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0 10px;
}

.indicator-tags .tag {
  font-size: 0.72rem;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(78, 205, 196, 0.12);
  border: 1px solid rgba(78, 205, 196, 0.28);
  color: var(--accent2);
}

.indicator-tags.muted-tags .tag {
  background: rgba(139, 156, 179, 0.08);
  border-color: rgba(139, 156, 179, 0.2);
  color: var(--muted);
}

.rules-list {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.82rem;
}

.rules-list li {
  margin-bottom: 6px;
}

.mode-tag {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--accent2);
  background: rgba(78, 205, 196, 0.1);
  border: 1px solid rgba(78, 205, 196, 0.25);
  border-radius: 999px;
  padding: 2px 8px;
  white-space: nowrap;
}

.backtest-row {
  cursor: pointer;
  transition: background 0.15s;
}

.backtest-row:hover,
.backtest-row:focus {
  background: rgba(78, 205, 196, 0.08);
  outline: none;
}

.view-link {
  color: var(--accent2);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.num-item.highlight {
  background: rgba(46, 213, 115, 0.18);
  border-color: rgba(46, 213, 115, 0.55);
  color: var(--success);
}

body.modal-open {
  overflow: hidden;
}

.modal[hidden] {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
}

.modal-panel {
  position: relative;
  width: 100%;
  max-width: 720px;
  max-height: 88vh;
  overflow: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px 16px 0 0;
  padding: 16px 12px calc(16px + var(--safe-bottom));
  -webkit-overflow-scrolling: touch;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.modal-header h2 {
  font-size: 1.1rem;
}

.modal-meta {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 4px;
}

.modal-meta .num {
  color: var(--accent2);
}

.modal-close {
  width: 36px;
  height: 36px;
  min-height: 36px;
  padding: 0;
  border-radius: 50%;
  background: var(--border);
  font-size: 1.4rem;
  line-height: 1;
}

.modal-actions {
  margin-bottom: 10px;
}

.modal-grid {
  margin-top: 8px;
}

@media (min-width: 640px) {
  .modal {
    align-items: center;
    padding: 20px;
  }

  .modal-panel {
    border-radius: 16px;
    max-height: 85vh;
  }
}

.disclaimer {
  margin-top: 24px;
  padding: 12px;
  background: rgba(255, 107, 53, 0.08);
  border: 1px solid rgba(255, 107, 53, 0.2);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.78rem;
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent2);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (min-width: 480px) {
  .numbers-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  header h1 {
    font-size: 1.75rem;
  }
}

@media (min-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .analysis {
    grid-template-columns: repeat(3, 1fr);
  }

  .numbers-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}