:root {
  --bg-primary: #090d16;
  --bg-secondary: #111827;
  --bg-card: #1f293d;
  --bg-card-hover: #28354f;
  --border-color: #334155;
  --border-light: rgba(255, 255, 255, 0.08);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --accent-purple: #8b5cf6;
  --intent-change: #d97706;
  --intent-change-bg: rgba(217, 119, 6, 0.15);
  --intent-add: #10b981;
  --intent-add-bg: rgba(16, 185, 129, 0.15);
  --intent-remove: #ef4444;
  --intent-remove-bg: rgba(239, 68, 68, 0.15);
  --status-unread: #3b82f6;
  --status-reviewed: #10b981;
  --status-resolved: #64748b;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.5);
  --shadow-lg: 0 20px 40px -15px rgba(0,0,0,0.7);
}

[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-secondary: #ffffff;
  --bg-card: #f8fafc;
  --bg-card-hover: #edf2f7;
  --border-color: #cbd5e1;
  --border-light: rgba(0, 0, 0, 0.06);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 40px -15px rgba(0,0,0,0.12);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s, color 0.2s;
}

/* Auth Guard Overlay */
.auth-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}
.auth-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 20px;
  text-align: center;
}
.auth-logo {
  font-size: 32px;
  margin-bottom: 4px;
}
.auth-title {
  font-size: 20px;
  font-weight: 700;
}
.auth-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Header & Nav */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}
.nav-brand-badge {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: white;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 9999px;
  letter-spacing: 0.5px;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Common Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent-blue);
  color: white;
}
.btn-primary:hover {
  background: var(--accent-blue-hover);
}
.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-muted);
}
.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border-color);
}
.btn-outline:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* Layout */
.main-container {
  flex: 1;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Stats Row */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.stat-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stat-value {
  font-size: 28px;
  font-weight: 800;
}
.stat-sub {
  font-size: 11px;
  color: var(--text-muted);
}

/* Sessions Section */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.section-title {
  font-size: 18px;
  font-weight: 700;
}
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
}
select.select-input, input.text-input {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 12px;
  font-size: 13px;
  border-radius: var(--radius-sm);
  outline: none;
}
select.select-input:focus, input.text-input:focus {
  border-color: var(--accent-blue);
}

/* Session Cards Table / List */
.sessions-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.session-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  transition: border-color 0.15s, transform 0.15s;
}
.session-card:hover {
  border-color: #475569;
  transform: translateY(-1px);
}
.session-card.unread {
  border-left: 4px solid var(--accent-blue);
}
.session-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}
.session-header-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.session-user {
  font-size: 15px;
  font-weight: 700;
}
.session-url {
  font-size: 12px;
  color: var(--accent-blue);
  text-decoration: none;
}
.session-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}
.intent-badges {
  display: flex;
  align-items: center;
  gap: 6px;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}
.pill-change { background: var(--intent-change-bg); color: var(--intent-change); }
.pill-add { background: var(--intent-add-bg); color: var(--intent-add); }
.pill-remove { background: var(--intent-remove-bg); color: var(--intent-remove); }
.pill-unread { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.pill-reviewed { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.pill-resolved { background: rgba(148, 163, 184, 0.2); color: #94a3b8; }

.session-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9000;
  padding: 20px;
}
.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow-lg);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-title {
  font-size: 17px;
  font-weight: 700;
}
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}
.code-block {
  background: #000;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-family: monospace;
  font-size: 12px;
  color: #38bdf8;
  overflow-x: auto;
  word-break: break-all;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  background: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.empty-icon {
  font-size: 36px;
}
.empty-title {
  font-size: 16px;
  font-weight: 700;
}
.empty-desc {
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 400px;
}