@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
  /* Backgrounds */
  --bg-base: #0e1117;
  --bg-surface: #161b22;
  --bg-elevated: #1c2128;

  /* Text */
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;

  /* Accent */
  --accent: #00ff87;
  --accent-hover: #00cc6a;
  --accent-glow: rgba(0, 255, 135, 0.15);

  /* Semantic */
  --danger: #f85149;
  --success: #3fb950;
  --warning: #d29922;
  --border: #30363d;

  /* Chart palette */
  --chart-1: #00ff87;
  --chart-2: #58a6ff;
  --chart-3: #d2a8ff;
  --chart-4: #f0883e;
  --chart-5: #ff7b72;

  /* Category colors */
  --cat-direct: #8b949e;
  --cat-search: #00ff87;
  --cat-social: #58a6ff;
  --cat-other: #d2a8ff;

  /* Typography */
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-body: 'DM Sans', system-ui, sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;

  /* Layout */
  --max-width: 1200px;
  --radius: 8px;
  --radius-sm: 4px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.main-content {
  padding: var(--spacing-md) 0;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-xs) 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.nav-wordmark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-decoration: none;
  white-space: nowrap;
}

.nav-wordmark .accent { color: var(--accent); }

.nav-spacer { flex: 1; }

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  cursor: pointer;
  transition: color 0.2s;
}

.nav-link:hover { color: var(--text-primary); }

/* Site picker */
.site-picker {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.875rem;
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  outline: none;
}

.site-picker:focus {
  border-color: var(--accent);
}

.site-picker option {
  background: var(--bg-surface);
  color: var(--text-primary);
}

/* Date pills */
.date-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.pill:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.pill.active {
  background: var(--accent);
  color: var(--bg-base);
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.custom-date {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.custom-date input[type="date"] {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.8rem;
  padding: 0.25rem 0.5rem;
  outline: none;
}

.custom-date input[type="date"]:focus {
  border-color: var(--accent);
}

/* Cards */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.card-elevated {
  background: var(--bg-elevated);
}

/* KPI Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.kpi-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Charts */
.chart-container {
  position: relative;
  height: 300px;
  margin-bottom: var(--spacing-md);
}

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

/* Two-column layout */
.grid-2 {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.grid-2-equal {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

/* Section headers */
.section-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid rgba(48, 54, 61, 0.5);
  color: var(--text-primary);
}

tr:hover td {
  background: rgba(22, 27, 34, 0.5);
}

td.mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

td.num {
  font-family: var(--font-mono);
  text-align: right;
}

.clickable-row {
  cursor: pointer;
}

.clickable-row:hover td {
  color: var(--accent);
}

/* Bar visualization for ranked items */
.bar-cell {
  position: relative;
}

.bar-bg {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: var(--accent-glow);
  border-radius: 2px;
  transition: width 0.3s;
}

.bar-text {
  position: relative;
  z-index: 1;
}

/* Badges */
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-direct { background: rgba(139, 148, 158, 0.15); color: var(--cat-direct); }
.badge-search { background: rgba(0, 255, 135, 0.15); color: var(--cat-search); }
.badge-social { background: rgba(88, 166, 255, 0.15); color: var(--cat-social); }
.badge-other  { background: rgba(210, 168, 255, 0.15); color: var(--cat-other); }

/* Referrer layout */
.referrer-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--spacing-sm);
  align-items: start;
}

.donut-container {
  position: relative;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Login */
.login-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--spacing-md);
}

.login-card {
  width: 100%;
  max-width: 420px;
  text-align: center;
}

.login-title {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.input-field {
  width: 100%;
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  outline: none;
  transition: border-color 0.2s;
}

.input-field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-base);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

/* Error message */
.error-msg {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: var(--spacing-sm);
}

/* Loading spinner */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg) 0;
}

.spinner {
  width: 32px;
  height: 32px;
  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); }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Compare view */
.compare-select {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.compare-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.875rem;
  transition: border-color 0.2s;
}

.compare-check:hover {
  border-color: var(--text-secondary);
}

.compare-check.selected {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.compare-check input[type="checkbox"] {
  accent-color: var(--accent);
}

.compare-kpis {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.compare-kpi-card {
  flex: 1;
  min-width: 200px;
}

.compare-kpi-card .site-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

/* Page title */
.page-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.page-title {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Utility */
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.mono { font-family: var(--font-mono); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }

/* Responsive */
@media (max-width: 1200px) {
  .grid-2, .grid-2-equal {
    grid-template-columns: 1fr;
  }
  .referrer-grid {
    grid-template-columns: 1fr;
  }
  .donut-container {
    height: 200px;
  }
}

@media (max-width: 768px) {
  .kpi-grid {
    grid-template-columns: 1fr 1fr;
  }
  .kpi-value {
    font-size: 1.5rem;
  }
  .chart-container {
    height: 220px;
  }
  .nav-inner {
    gap: 0.5rem;
  }
  .date-controls {
    flex-wrap: wrap;
  }
  .compare-kpi-card {
    min-width: 150px;
  }
}