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

:root {
  --bg: #0b0f1a;
  --surface: #141926;
  --surface-hover: #1a2035;
  --border: #1e2a3a;
  --text: #e2e8f0;
  --text-dim: #8892a4;
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --green: #22c55e;
  --yellow: #eab308;
  --red: #ef4444;
  --mobile-color: #06b6d4;
  --desktop-color: #8b5cf6;
  --radius: 12px;
  --font: 'Fira Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', 'Consolas', 'Monaco', monospace;
}

html {
  font-size: 15px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 15, 26, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.loading-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Error Banner */
.error-banner {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(-60px);
  background: var(--red);
  color: #fff;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 200;
  opacity: 0;
  transition: all 0.3s ease;
}

.error-banner.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-left {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.last-updated {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.refresh-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.refresh-btn:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 20px var(--accent-glow);
}

.refresh-btn:active {
  transform: scale(0.97);
}

/* Dashboard Grid */
.dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
  padding: 28px 32px;
  max-width: 1400px;
  margin: 0 auto;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 0 24px var(--accent-glow);
}

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

.card-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.card-header-row .card-title {
  margin-bottom: 0;
}

.card-badge {
  font-size: 0.8rem;
  color: var(--text-dim);
  background: var(--bg);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

.card-badge .highlight {
  color: var(--accent);
  font-weight: 700;
}

.card-metric {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Bar Chart */
.bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
}

.bar-row + .bar-row {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.bar-label {
  min-width: 120px;
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bar-track {
  flex: 1;
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #818cf8);
  border-radius: 4px;
  transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.bar-value {
  min-width: 60px;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* Gallery sub-row */
.bar-row-sub {
  padding-left: 16px;
}

.bar-label-sub {
  color: var(--text-dim);
  font-size: 0.8rem;
  min-width: 104px;
}

.bar-fill-gallery {
  background: linear-gradient(90deg, #6d28d9, #a78bfa);
}

/* Device Breakdown */
.device-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 0;
}

.device-row + .device-row {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.device-info {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 100px;
  font-size: 0.9rem;
  font-weight: 500;
}

.device-icon {
  font-size: 1.1rem;
}

.device-stat {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-fill {
  background: linear-gradient(90deg, var(--mobile-color), #22d3ee);
}

.desktop-fill {
  background: linear-gradient(90deg, var(--desktop-color), #a78bfa);
}

/* Event Type Rows */
.event-type-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
}

.event-type-row + .event-type-row {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.event-type-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 8px;
  border-radius: 4px;
}

.event-type-count {
  font-size: 0.85rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Data Integrity */
.status-ok {
  color: var(--green);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 0;
}

.status-ok::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  margin-right: 8px;
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.4);
}

.status-warn {
  color: var(--yellow);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 0;
}

.status-warn::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--yellow);
  border-radius: 50%;
  margin-right: 8px;
  box-shadow: 0 0 8px rgba(234, 179, 8, 0.3);
}

.status-warn + .status-warn {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.empty {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-style: italic;
}

/* Danger Zone */
.card-danger {
  border-color: rgba(239, 68, 68, 0.25);
}

.card-danger:hover {
  border-color: rgba(239, 68, 68, 0.4);
  box-shadow: 0 0 24px rgba(239, 68, 68, 0.1);
}

.card-title-danger {
  color: var(--red);
}

.danger-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.danger-info strong {
  font-size: 0.95rem;
  color: var(--text);
}

.danger-info p {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 4px;
}

.reset-btn {
  padding: 8px 20px;
  border: 1px solid rgba(239, 68, 68, 0.4);
  background: rgba(239, 68, 68, 0.1);
  color: var(--red);
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.reset-btn:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--red);
}

.reset-btn:active {
  transform: scale(0.97);
}

.reset-btn-confirm {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}

.reset-btn-confirm:hover {
  filter: brightness(1.15);
  background: var(--red);
}

.reset-btn-confirm:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.reset-btn-cancel {
  background: transparent;
  color: var(--text-dim);
  border-color: var(--border);
}

.reset-btn-cancel:hover {
  color: var(--text);
  border-color: var(--text-dim);
  background: transparent;
}

.reset-confirm-text {
  font-size: 0.85rem;
  color: var(--red);
  font-weight: 500;
}

.reset-confirm-btns {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

#reset-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

/* Accessibility - Focus States */
.refresh-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Device Icon SVG */
.device-icon {
  flex-shrink: 0;
  color: var(--text-dim);
}

/* Responsive */
@media (max-width: 700px) {
  .header {
    flex-direction: column;
    gap: 12px;
    padding: 18px 16px;
    align-items: flex-start;
  }

  .header-left {
    flex-direction: column;
    gap: 4px;
  }

  .dashboard {
    grid-template-columns: 1fr;
    padding: 16px;
    gap: 14px;
  }

  .card {
    padding: 18px 16px;
  }

  .card-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .bar-label {
    min-width: 80px;
    font-size: 0.78rem;
  }

  .card-metric {
    font-size: 2rem;
  }

  .danger-content {
    flex-direction: column;
    align-items: flex-start;
  }

  #reset-actions {
    align-items: flex-start;
    width: 100%;
  }
}