:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-alt: #f1f4f8;
  --surface-strong: #0f172a;
  --surface-tint: #eef5ff;
  --text: #111827;
  --text-soft: #4b5563;
  --text-muted: #6b7280;
  --text-on-dark: #e5eefb;
  --border: #dde3ea;
  --border-strong: #c8d1dc;
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --success: #15803d;
  --danger: #dc2626;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --container: 1200px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top right, rgba(29, 78, 216, 0.10), transparent 28%),
    radial-gradient(circle at top left, rgba(16, 185, 129, 0.08), transparent 24%),
    var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.app-shell {
  min-height: 100vh;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.section {
  padding: 32px 0;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  padding: 72px 0 48px;
  align-items: center;
}

.hero-copy h1,
.page-title {
  margin: 0;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero-copy h1 {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
}

.page-title {
  font-size: 2rem;
}

.page-subtitle,
.section-description,
.metric-note {
  color: var(--text-soft);
}

.hero-copy p {
  margin-top: var(--space-4);
  color: var(--text-soft);
  font-size: 1.05rem;
  max-width: 640px;
}

.hero-stat-grid {
  margin-top: var(--space-6);
}

.stack-panel {
  display: grid;
  gap: var(--space-4);
}

.stack-list {
  display: grid;
  gap: var(--space-3);
}

.card-inline-meta,
.table-chip-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.card-inline-meta span,
.table-chip {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--surface-tint);
  color: #1e3a8a;
  font-size: 0.75rem;
  font-weight: 700;
}

.table-chip {
  background: #eff6ff;
}

.compact-grid {
  gap: var(--space-3);
}

.hero-actions,
.filter-row,
.button-row {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.hero-actions {
  margin-top: var(--space-6);
}

.page-header,
.section-header,
.chart-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.grid-2,
.grid-3,
.metric-grid,
.split-result,
.hero-stat-grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3,
.metric-grid,
.split-result,
.hero-stat-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hero-panel,
.data-card,
.metric-card,
.chart-card,
.toolbar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.data-card,
.chart-card,
.toolbar {
  padding: var(--space-5);
}

.metric-card {
  padding: var(--space-4);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(238, 245, 255, 0.92));
}

.section-gap {
  margin-top: var(--space-5);
}

.chart-card.dark {
  background: var(--surface-strong);
  color: var(--text-on-dark);
  border-color: rgba(148, 163, 184, 0.16);
}

.card-title {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 600;
}

.price-value,
.metric-value,
.stat-value {
  display: block;
  margin-top: var(--space-2);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}

.price-value,
.metric-value {
  font-size: 1.75rem;
}

.stat-value {
  font-size: 1.35rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: 600;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--border-strong);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.badge-neutral {
  background: #edf2f7;
  color: #475569;
}

.field {
  display: grid;
  gap: 6px;
  min-width: 180px;
}

.field-label {
  color: var(--text-soft);
  font-size: 0.8125rem;
  font-weight: 600;
}

.select {
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.input {
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  font: inherit;
  color: inherit;
}

.input:focus,
.select:focus {
  outline: 2px solid rgba(29, 78, 216, 0.16);
  border-color: var(--primary);
}

.form-grid,
.model-picker,
.table-form-grid,
.admin-form-grid {
  display: grid;
  gap: var(--space-4);
}

.form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.model-picker {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.table-form {
  display: grid;
  gap: var(--space-3);
}

.table-form-grid {
  grid-template-columns: repeat(2, minmax(120px, 1fr));
}

.admin-form-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.input-compact {
  min-height: 36px;
  padding: 0 10px;
  font-size: 0.875rem;
}

.check-card,
.checkbox-row {
  display: flex;
  gap: 12px;
}

.check-card {
  align-items: flex-start;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-alt);
}

.check-card input,
.checkbox-row input {
  margin-top: 3px;
}

.check-card-body {
  display: grid;
  gap: 4px;
}

.checkbox-row-inline {
  align-items: center;
  min-height: 42px;
}

.toolbar-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.helper-text {
  margin: 8px 0 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.compact-header {
  margin-bottom: var(--space-4);
}

.delta-pill {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-top: var(--space-2);
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.delta-up {
  background: #fee2e2;
  color: #b91c1c;
}

.delta-down {
  background: #dcfce7;
  color: #166534;
}

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

.data-table th {
  color: var(--text-soft);
  font-size: 0.8125rem;
}

.data-table tbody tr:hover {
  background: #fafcff;
}

.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.chart-placeholder {
  min-height: 280px;
  border-radius: var(--radius-md);
  background:
    linear-gradient(to bottom, rgba(148, 163, 184, 0.12), rgba(148, 163, 184, 0.04)),
    rgba(255, 255, 255, 0.04);
}

.stat-block {
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-alt);
}

.stat-label {
  display: block;
  color: var(--text-soft);
  font-size: 0.8125rem;
}

.code-block {
  overflow-x: auto;
  margin: 0;
  padding: 16px;
  border-radius: var(--radius-md);
  background: #0b1220;
  color: #dbe7ff;
  font-size: 0.875rem;
}

@media (max-width: 1024px) {
  .hero,
  .grid-2,
  .grid-3,
  .metric-grid,
  .hero-stat-grid,
  .split-result,
  .form-grid,
  .model-picker,
  .table-form-grid,
  .admin-form-grid {
    grid-template-columns: 1fr;
  }

  .page-header,
  .section-header,
  .chart-card-header {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--container), calc(100% - 20px));
  }

  .hero {
    padding: 48px 0 32px;
  }

  .hero-actions,
  .filter-row,
  .toolbar-actions,
  .button-row {
    flex-direction: column;
  }

  .field {
    min-width: 0;
  }

  .data-card,
  .chart-card,
  .toolbar,
  .metric-card {
    padding: var(--space-4);
  }
}