:root {
  --bg: #071a24;
  --surface: #0c2435;
  --surface2: #0f2d40;
  --border: #163a50;
  --text: #e0f0f8;
  --text-muted: #7da8be;
  --accent: #06b6d4;
  --accent2: #4ade80;
  --accent-glow: rgba(6,182,212,.12);
  --accent2-glow: rgba(74,222,128,.12);
  --green: #4ade80;
  --red: #f87171;
  --yellow: #fbbf24;
  --radius: 12px;
}

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

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

/* Header */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 16px;
}

.header-left { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }

.logo {
  height: 28px;
  width: auto;
  display: block;
}

.subtitle { color: var(--text-muted); font-size: 14px; }

.filters { display: flex; gap: 6px; flex-wrap: wrap; }
.logout-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 7px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 12px;
  transition: all .15s;
  flex-shrink: 0;
}
.logout-btn:hover { border-color: var(--red); color: var(--red); }
.filters button {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 7px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all .15s;
  white-space: nowrap;
}
.filters button:hover { border-color: var(--accent); color: var(--text); }
.filters button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Main */
main { padding: 24px 32px; max-width: 1400px; margin: 0 auto; }

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.kpi-card.accent {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.kpi-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.kpi-value {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -1px;
  word-break: break-word;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.card h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.badge {
  font-size: 11px;
  font-weight: 500;
  background: var(--accent-glow);
  color: var(--accent);
  padding: 3px 10px;
  border-radius: 20px;
}

/* Reach grid */
.reach-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.reach-grid .kpi-value { font-size: 32px; }

/* Charts */
.chart-container { position: relative; width: 100%; height: 320px; }
.chart-small { height: 260px; }

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

thead th {
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody tr:hover { background: var(--surface2); }

/* Two columns */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.two-col .card { margin-bottom: 0; }

/* Footer */
footer {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 12px;
}

/* Tabs */
.tabs { display: flex; gap: 4px; }
.tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 6px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all .15s;
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--surface2); border-color: var(--border); color: var(--text); }

/* Grid variants */
.cols-4 { grid-template-columns: repeat(4, 1fr); }
.cols-5 { grid-template-columns: repeat(5, 1fr); }

/* Card variants */
.green-border { border-color: var(--green); }

/* KPI sub text */
.kpi-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: -4px;
}

/* Hidden */
.hidden { display: none !important; }

/* UTM controls */
.utm-controls { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.utm-filters { display: flex; gap: 6px; flex-wrap: wrap; }
.utm-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 7px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all .15s;
}
.utm-btn:hover { border-color: var(--accent); color: var(--text); }
.utm-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* Empty state */
.empty-state { text-align: center; padding: 60px 24px; }
.empty-icon { font-size: 48px; margin-bottom: 16px; }
.empty-state h3 { font-size: 18px; margin-bottom: 8px; }
.empty-state p { color: var(--text-muted); font-size: 14px; }

/* Loading state */
.loading { opacity: 0.5; pointer-events: none; }

/* ══════════════════════════════════════
   RESPONSIVE - TABLET
   ══════════════════════════════════════ */
@media (max-width: 1024px) {
  header {
    flex-wrap: wrap;
    padding: 16px 20px;
  }
  .header-left { width: 100%; justify-content: space-between; }
  .filters { order: 3; width: 100%; }
  .logout-btn { order: 2; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .cols-5 { grid-template-columns: repeat(3, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  main { padding: 20px; }
}

/* ══════════════════════════════════════
   RESPONSIVE - MOBILE
   ══════════════════════════════════════ */
@media (max-width: 600px) {
  header {
    padding: 12px 16px;
    gap: 10px;
  }
  .header-left { gap: 10px; }
  .logo { height: 22px; }
  .tabs { gap: 2px; }
  .tab { padding: 5px 10px; font-size: 12px; }
  .logout-btn { padding: 6px 10px; font-size: 11px; }

  .filters { gap: 4px; }
  .filters button { padding: 6px 10px; font-size: 12px; }

  main { padding: 12px; }

  .kpi-grid { grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
  .cols-4, .cols-5 { grid-template-columns: 1fr 1fr; }

  .kpi-card { padding: 14px 16px; gap: 4px; }
  .kpi-value { font-size: 20px; }
  .kpi-label { font-size: 10px; }
  .kpi-sub { font-size: 10px; }

  .card { padding: 16px; margin-bottom: 16px; }
  .card h2 { font-size: 14px; margin-bottom: 12px; }

  .chart-container { height: 240px; }
  .chart-small { height: 200px; }

  .reach-grid { gap: 16px; }
  .reach-grid .kpi-value { font-size: 24px; }

  table { font-size: 12px; }
  thead th { padding: 8px; font-size: 10px; }
  tbody td { padding: 8px; }

  .two-col { gap: 16px; }

  .utm-controls { flex-direction: column; align-items: flex-start; }
  .utm-filters { gap: 4px; }
  .utm-btn { padding: 6px 12px; font-size: 12px; }

  .empty-state { padding: 40px 16px; }
  .empty-icon { font-size: 36px; }
  .empty-state h3 { font-size: 16px; }

  footer { padding: 16px; font-size: 11px; }
}

/* Very small screens - stack KPIs single column */
@media (max-width: 380px) {
  .kpi-grid, .cols-4, .cols-5 { grid-template-columns: 1fr; }
  .reach-grid { grid-template-columns: 1fr; }
}