:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-raised: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #10b981;
  --accent-hover: #059669;
  --danger: #ef4444;
  --danger-soft: #fca5a5;
  --warning: #f59e0b;
  --border: #334155;
  --tab-active: #1e293b;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.3);
  --radius: 12px;
  --radius-sm: 8px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

/* Header */
.app-header {
  background: var(--surface);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.app-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
}

.app-header .date {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Tab Bar */
.tab-bar {
  display: flex;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.tab-bar::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  flex: 1;
  min-width: 72px;
  padding: 12px 8px;
  background: none;
  border: none;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.tab-btn .tab-icon {
  font-size: 1.25rem;
}

.tab-btn.active {
  color: var(--accent);
  background: var(--tab-active);
  box-shadow: inset 0 -2px 0 var(--accent);
}

.tab-btn:active {
  opacity: 0.7;
}

/* Content */
.content {
  padding: 12px;
  padding-bottom: 80px;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
}

.card h2, .card h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.card.greeting h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 4px;
}

.card.greeting .subtitle {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* Briefing Cards */
.briefing-card {
  background: var(--surface-raised);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
}

.briefing-card:active {
  transform: scale(0.98);
  background: var(--border);
}

.briefing-card .badge {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.briefing-card .badge-political {
  background: #3b82f6;
  color: white;
}

.briefing-card .badge-investment {
  background: var(--accent);
  color: white;
}

.briefing-card .title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
}

.briefing-card .meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Market Grid */
.market-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.market-item {
  background: var(--surface-raised);
  border-radius: var(--radius-sm);
  padding: 14px;
}

.market-item .symbol {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.market-item .price {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.market-item .change {
  font-size: 0.875rem;
  font-weight: 600;
}

.market-item .change.up {
  color: var(--accent);
}

.market-item .change.down {
  color: var(--danger);
}

/* Nutrition */
.meal-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.meal-item:last-child {
  border-bottom: none;
}

.meal-item .meal-name {
  font-weight: 500;
}

.meal-item .meal-cal {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Action Buttons */
.action-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.action-btn {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 8px;
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 0.75rem;
  font-weight: 500;
}

.action-btn:active {
  background: var(--border);
  transform: scale(0.97);
}

.action-btn .action-icon {
  font-size: 1.5rem;
}

/* Portfolio */
.portfolio-total {
  text-align: center;
  padding: 10px 0;
}

.portfolio-total .label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.portfolio-total .value {
  font-size: 2rem;
  font-weight: 700;
  margin: 4px 0;
}

.portfolio-total .change {
  font-size: 1rem;
  font-weight: 600;
}

.position-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.position-row:last-child {
  border-bottom: none;
}

.position-info .ticker {
  font-weight: 600;
  font-size: 0.9375rem;
}

.position-info .shares {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.position-pnl {
  text-align: right;
}

.position-pnl .pnl-value {
  font-weight: 600;
  font-size: 0.9375rem;
}

.position-pnl .pnl-pct {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Loading */
.loading {
  color: var(--text-muted);
  font-size: 0.875rem;
  text-align: center;
  padding: 20px;
}

.empty {
  color: var(--text-muted);
  font-size: 0.875rem;
  text-align: center;
  padding: 16px;
}

/* Toast */
#toast-container {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  pointer-events: none;
}

.toast {
  background: var(--surface-raised);
  color: var(--text);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  margin-top: 8px;
  font-size: 0.875rem;
  box-shadow: var(--shadow);
  animation: toastIn 0.3s ease;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Utilities */
.up { color: var(--accent); }
.down { color: var(--danger); }

/* Tablet + Desktop */
@media (min-width: 768px) {
  .content {
    max-width: 640px;
    margin: 0 auto;
    padding: 20px;
  }

  .market-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}