/* ── DASH Analytics — Premium Dark Glassmorphism ─────────────────── */

:root {
  /* Base from Telegram with premium fallbacks */
  --bg: var(--tg-theme-bg-color, #0a0a1a);
  --bg-secondary: var(--tg-theme-secondary-bg-color, #12122a);
  --text: var(--tg-theme-text-color, #e8e8f0);
  --hint: var(--tg-theme-hint-color, #6b6b80);
  --accent: var(--tg-theme-accent-text-color, #4cc9f0);

  /* Premium palette */
  --gradient-start: #4cc9f0;
  --gradient-end: #7b2ff7;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 20px;
  --success: #4ade80;
  --danger: #f87171;

  /* Card accent borders */
  --card-accent-1: #4cc9f0;
  --card-accent-2: #7b2ff7;
  --card-accent-3: #4ade80;
  --card-accent-4: #f87171;

  /* Timing */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  padding: 16px;
  padding-bottom: 48px;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

/* ── Hero ────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  text-align: center;
  padding: 32px 16px 24px;
  margin: -16px -16px 24px -16px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -50%;
  left: -25%;
  width: 150%;
  height: 200%;
  background: radial-gradient(
    ellipse at 50% 80%,
    rgba(76, 201, 240, 0.12) 0%,
    rgba(123, 47, 247, 0.08) 40%,
    transparent 70%
  );
  animation: hero-pulse 6s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes hero-pulse {
  0% { opacity: 0.6; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.1); }
}

.hero-brand {
  display: block;
  font-size: 36px;
  font-weight: 800;
  letter-spacing: 4px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.hero-subtitle {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--hint);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 4px;
  position: relative;
}

/* ── Skeleton Loading ────────────────────────────────────────────── */

.skeleton-line {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.04) 25%,
    rgba(255, 255, 255, 0.08) 50%,
    rgba(255, 255, 255, 0.04) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 8px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-card {
  min-height: 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 16px;
}

/* ── Section Layout ──────────────────────────────────────────────── */

h2 {
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--hint);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.section {
  margin-bottom: 28px;
}

/* Scroll-triggered fade in */
.section,
.overview-grid {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.section.visible,
.overview-grid.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.hero.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Glass Mixin ─────────────────────────────────────────────────── */

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: 16px;
}

/* ── Overview Cards ──────────────────────────────────────────────── */

.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 28px;
}

.card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 16px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast);
}

.card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: 16px 0 0 16px;
  background: var(--card-accent, var(--accent));
}

.card:active {
  transform: scale(0.97);
}

.overview-grid .card:nth-child(1) { --card-accent: var(--card-accent-1); }
.overview-grid .card:nth-child(2) { --card-accent: var(--card-accent-2); }
.overview-grid .card:nth-child(3) { --card-accent: var(--card-accent-3); }
.overview-grid .card:nth-child(4) { --card-accent: var(--card-accent-4); }

.card-value {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--text);
}

.card-label {
  font-size: 12px;
  color: var(--hint);
  margin-top: 4px;
}

.card-delta {
  font-size: 13px;
  font-weight: 600;
  margin-left: 6px;
}

.delta-up { color: var(--success); }
.delta-down { color: var(--danger); }
.delta-zero { color: var(--hint); }

/* ── Chart Containers ────────────────────────────────────────────── */

.chart-container {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 16px;
  position: relative;
  height: 220px;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

/* ── A/B Test Cards ──────────────────────────────────────────────── */

.ab-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.ab-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 16px;
  text-align: left;
  transition: transform var(--transition-fast);
}

.ab-card:active {
  transform: scale(0.97);
}

.ab-card.winner {
  border: 1px solid rgba(76, 201, 240, 0.3);
  box-shadow:
    0 0 20px rgba(76, 201, 240, 0.08),
    0 0 60px rgba(123, 47, 247, 0.04),
    inset 0 0 30px rgba(76, 201, 240, 0.03);
}

.ab-type {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 12px;
  color: var(--accent);
}

.winner-badge {
  font-size: 9px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  vertical-align: middle;
  margin-left: 4px;
  letter-spacing: 0.5px;
}

.ab-metric-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
}

.ab-value {
  font-size: 24px;
  font-weight: 800;
}

.ab-label {
  font-size: 11px;
  color: var(--hint);
}

.ab-bar-track {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  overflow: hidden;
}

.ab-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  border-radius: 2px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.ab-bar-fill.reactions {
  background: linear-gradient(90deg, var(--success), #22d3ee);
}

.ab-count {
  font-size: 11px;
  color: var(--hint);
  margin-top: 12px;
  text-align: center;
}

/* ── Best Posts ───────────────────────────────────────────────────── */

.best-posts {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.best-post {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.best-post:active {
  transform: scale(0.98);
  box-shadow: 0 0 20px rgba(76, 201, 240, 0.08);
}

.best-post-rank {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  flex-shrink: 0;
  color: #fff;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
}

.best-post:nth-child(1) .best-post-rank { background: linear-gradient(135deg, #fbbf24, #f59e0b); }
.best-post:nth-child(2) .best-post-rank { background: linear-gradient(135deg, #94a3b8, #64748b); }
.best-post:nth-child(3) .best-post-rank { background: linear-gradient(135deg, #cd7f32, #a0522d); }

.best-post-thumb {
  width: 72px;
  height: 54px;
  border-radius: 10px;
  object-fit: cover;
  background: var(--bg);
}

.best-post-info {
  flex: 1;
  min-width: 0;
}

.best-post-stats {
  font-size: 14px;
  font-weight: 700;
}

.best-post-theme {
  font-size: 12px;
  color: var(--hint);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

/* ── Loading & Error ─────────────────────────────────────────────── */

.loading {
  text-align: center;
  padding: 40px;
  color: var(--hint);
}

.error {
  text-align: center;
  padding: 40px 20px;
  color: var(--danger);
  font-size: 14px;
  background: rgba(248, 113, 113, 0.06);
  border: 1px solid rgba(248, 113, 113, 0.15);
  border-radius: 16px;
  margin: 20px 0;
}