:root {
  --bg: #f4f6f9;
  --bg-elev: #ffffff;
  --bg-card: #ffffff;
  --text: #1a2332;
  --text-muted: #6b7d93;
  --line: #dde3eb;
  --brand: #1a8fd1;
  --brand-end: #2ea3e5;
  --ok: #2e9e6a;
  --warn: #d4940a;
  --danger: #d94444;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
  --loader-overlay: rgba(244, 246, 249, 0.85);
  --chart-grid: #e8ecf1;
  --badge-ga4-bg: #e6f7ed;
  --badge-ga4-text: #1a7a3a;
  --badge-ga4-border: #b2dfcc;
  --badge-mock-bg: #fff3e0;
  --badge-mock-text: #b36b00;
  --badge-mock-border: #f0d0a0;
}

[data-theme="dark"] {
  --bg: #0f1219;
  --bg-elev: #1a1f2e;
  --bg-card: #1a1f2e;
  --text: #e1e6ef;
  --text-muted: #8b95a8;
  --line: #2a3042;
  --brand: #3daee6;
  --brand-end: #5bbff0;
  --ok: #4cc88a;
  --warn: #e8ab2e;
  --danger: #ef6b6b;
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --loader-overlay: rgba(15, 18, 25, 0.85);
  --chart-grid: #2a3042;
  --badge-ga4-bg: #143326;
  --badge-ga4-text: #4cc88a;
  --badge-ga4-border: #1f5c3f;
  --badge-mock-bg: #332a10;
  --badge-mock-text: #e8ab2e;
  --badge-mock-border: #4d3f18;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  min-height: 100vh;
}

.container {
  width: min(1200px, 94vw);
  margin: 0 auto;
  padding: 1rem 0 2rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.brand small {
  display: block;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 500;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.grid {
  display: grid;
  gap: 0.9rem;
}

.kpi-grid {
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}

.kpi-title {
  color: var(--text-muted);
  font-size: 0.83rem;
}

.kpi-value {
  margin-top: 0.35rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.kpi-meta {
  margin-top: 0.3rem;
  font-size: 0.85rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}

th {
  color: var(--text-muted);
  font-weight: 600;
}

.badge {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.row {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: 1fr;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

button,
input,
select {
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--text);
  padding: 0.55rem 0.7rem;
  font-size: 0.9rem;
}

button {
  cursor: pointer;
}

button.primary {
  background: linear-gradient(120deg, var(--brand), var(--brand-end));
  border-color: var(--brand);
  color: #ffffff;
}

.period-btn.active {
  border-color: var(--brand);
  box-shadow: inset 0 0 0 1px var(--brand);
}

.text-muted {
  color: var(--text-muted);
}

.status-up {
  color: var(--ok);
}

.status-down {
  color: var(--danger);
}

.chart-wrap {
  min-height: 230px;
}

.auth-box {
  max-width: 420px;
  margin: 10vh auto 0;
}

.error {
  color: var(--danger);
  font-size: 0.88rem;
}

@media (min-width: 900px) {
  .row.two {
    grid-template-columns: 1.3fr 1fr;
  }

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

/* Loader overlay */
.loader-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--loader-overlay);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 0.8rem;
}

.loader-overlay.active {
  display: flex;
}

.loader-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--line);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.loader-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.35rem 0.55rem;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  color: var(--text);
}

.theme-toggle:hover {
  background: var(--line);
}