/* ============================================
   Lead Master — Design System
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- CSS Variables --- */
:root {
  /* Brand Colors */
  --brand-primary: #6366f1;
  --brand-primary-light: #818cf8;
  --brand-primary-dark: #4f46e5;
  --brand-accent: #06b6d4;
  --brand-accent-light: #22d3ee;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-success-light: #34d399;
  --color-warning: #f59e0b;
  --color-warning-light: #fbbf24;
  --color-danger: #ef4444;
  --color-danger-light: #f87171;
  --color-info: #3b82f6;

  /* Dark Theme (default) */
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-card: rgba(26, 26, 46, 0.8);
  --bg-card-hover: rgba(26, 26, 46, 0.95);
  --bg-input: rgba(15, 15, 26, 0.6);
  --bg-glass: rgba(26, 26, 46, 0.5);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-inverse: #0f0f1a;

  --border-color: rgba(99, 102, 241, 0.15);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-focus: var(--brand-primary);

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
  --gradient-card: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(6, 182, 212, 0.05) 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --gradient-danger: linear-gradient(135deg, #ef4444 0%, #f59e0b 100%);
  --gradient-glow: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 60%);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.05);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background glow effect */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 500px;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

a {
  color: var(--brand-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--brand-accent-light); }

/* --- Layout --- */
.app-layout {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
}

.sidebar-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-brand);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.sidebar-logo h1 {
  font-size: 1.15rem;
  font-weight: 700;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-logo .version {
  font-size: 0.65rem;
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-md);
  overflow-y: auto;
}

.nav-section {
  margin-bottom: var(--space-lg);
}

.nav-section-title {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-xs);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  position: relative;
}

.nav-link:hover {
  background: rgba(99, 102, 241, 0.1);
  color: var(--text-primary);
}

.nav-link.active {
  background: rgba(99, 102, 241, 0.15);
  color: var(--brand-primary-light);
}

.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
}

.nav-link .nav-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
}

.nav-link .nav-badge {
  margin-left: auto;
  background: var(--brand-primary);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border-subtle);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: white;
}

.user-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.user-role {
  font-size: 0.7rem;
  color: var(--text-tertiary);
}

/* Main content area */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: var(--space-xl);
  position: relative;
  z-index: 1;
}

/* Page header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
}

.page-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-header .subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.25);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.card-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- KPI Cards --- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.3);
}

.kpi-card:hover::before {
  opacity: 1;
}

.kpi-icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.kpi-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-xs);
}

.kpi-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.kpi-change {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-top: var(--space-sm);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.kpi-change.positive {
  color: var(--color-success);
  background: rgba(16, 185, 129, 0.1);
}

.kpi-change.negative {
  color: var(--color-danger);
  background: rgba(239, 68, 68, 0.1);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-brand);
  color: white;
  border: none;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  border-color: var(--brand-primary);
  background: rgba(99, 102, 241, 0.1);
}

.btn-success {
  background: var(--gradient-success);
  color: white;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}
.btn-success:hover {
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.5);
  transform: translateY(-1px);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--color-danger-light);
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn-danger:hover {
  background: var(--color-danger);
  color: white;
}

.btn-sm {
  padding: 4px var(--space-sm);
  font-size: 0.78rem;
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  justify-content: center;
  border-radius: var(--radius-md);
}

/* --- Forms --- */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px var(--space-md);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-row-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-md);
}

/* --- Tables --- */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

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

thead th {
  background: rgba(99, 102, 241, 0.08);
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast);
}

thead th:hover {
  color: var(--brand-primary-light);
}

tbody tr {
  transition: background var(--transition-fast);
  border-bottom: 1px solid var(--border-subtle);
}

tbody tr:hover {
  background: rgba(99, 102, 241, 0.05);
}

tbody td {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
  color: var(--text-primary);
  white-space: nowrap;
}

/* --- Status Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-new { background: rgba(59, 130, 246, 0.15); color: var(--color-info); }
.badge-scored { background: rgba(99, 102, 241, 0.15); color: var(--brand-primary-light); }
.badge-sold { background: rgba(16, 185, 129, 0.15); color: var(--color-success); }
.badge-rejected { background: rgba(239, 68, 68, 0.15); color: var(--color-danger); }
.badge-dnc { background: rgba(239, 68, 68, 0.25); color: var(--color-danger-light); }
.badge-validated { background: rgba(6, 182, 212, 0.15); color: var(--brand-accent); }
.badge-enriched { background: rgba(245, 158, 11, 0.15); color: var(--color-warning); }

/* Quality score colors */
.score-high { color: var(--color-success-light); }
.score-medium { color: var(--color-warning-light); }
.score-low { color: var(--color-danger-light); }

.score-bar {
  width: 60px;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
  margin-right: var(--space-sm);
}

.score-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

/* --- Charts container --- */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  backdrop-filter: blur(12px);
}

.chart-placeholder {
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.03);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-color);
  color: var(--text-tertiary);
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.95);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.modal-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.modal-footer {
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-subtle);
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-width: 300px;
  animation: slideIn var(--transition-base) ease-out;
  transition: all var(--transition-base);
}

.toast.success { border-left: 3px solid var(--color-success); }
.toast.error { border-left: 3px solid var(--color-danger); }
.toast.warning { border-left: 3px solid var(--color-warning); }
.toast.info { border-left: 3px solid var(--color-info); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* --- Upload zone --- */
.upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--brand-primary);
  background: rgba(99, 102, 241, 0.05);
}

.upload-zone .upload-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.upload-zone .upload-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.upload-zone .upload-hint {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  margin-top: var(--space-sm);
}

/* --- Pagination --- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
}

.pagination-info {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.pagination-controls {
  display: flex;
  gap: var(--space-xs);
}

.pagination-btn {
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
  border-color: var(--brand-primary);
  color: var(--text-primary);
}

.pagination-btn.active {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: white;
}

.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* --- Filter Bar --- */
.filter-bar {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.filter-bar .form-input,
.filter-bar .form-select {
  width: auto;
  min-width: 150px;
}

.filter-bar .search-input {
  min-width: 250px;
  padding-left: 36px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'%3E%3C/circle%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'%3E%3C/line%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 12px center;
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-tertiary);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

/* --- Checkbox Selection --- */
.checkbox-cell {
  width: 40px;
  text-align: center;
}

.checkbox-cell input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--brand-primary);
  cursor: pointer;
}

/* --- Action Toolbar --- */
.action-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  animation: slideIn var(--transition-fast) ease-out;
}

.action-toolbar .selected-count {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-primary-light);
  margin-right: var(--space-md);
}

/* --- Period Selector --- */
.period-selector {
  display: flex;
  gap: 2px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 2px;
}

.period-btn {
  padding: 6px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.period-btn:hover { color: var(--text-primary); }

.period-btn.active {
  background: var(--brand-primary);
  color: white;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* --- Loading spinner --- */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--brand-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* --- Login Page --- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
}

.login-card .logo-area {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.login-card .logo-area .logo-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-md);
  background: var(--gradient-brand);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 800;
  color: white;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.3);
}

.login-card .logo-area h1 {
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-card .logo-area p {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  margin-top: var(--space-xs);
}

.login-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--color-danger-light);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  margin-bottom: var(--space-md);
  display: none;
}

/* --- Landing Page Styles --- */
.landing-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #0f0f1a 0%, #1a1a3e 50%, #0f2027 100%);
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.landing-hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-xl);
}

.landing-container {
  max-width: 500px;
  width: 100%;
}

.landing-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.landing-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--space-md);
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.landing-header p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.landing-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
}

.landing-form .form-input,
.landing-form .form-select {
  padding: 14px var(--space-md);
  font-size: 1rem;
  border-radius: var(--radius-md);
}

.landing-form .btn-primary {
  width: 100%;
  padding: 14px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.consent-text {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  line-height: 1.5;
  margin-top: var(--space-md);
  padding: var(--space-sm);
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
}

.thank-you {
  text-align: center;
  padding: var(--space-2xl);
  display: none;
}

.thank-you .check-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-lg);
  background: var(--gradient-success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  animation: scaleIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes scaleIn {
  from { transform: scale(0); }
  to { transform: scale(1); }
}

.thank-you h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.thank-you p {
  color: var(--text-secondary);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .sidebar { width: 220px; }
  .main-content { margin-left: 220px; }
  .chart-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .form-row-3 { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .page-header { flex-direction: column; align-items: flex-start; gap: var(--space-md); }
}

@media (max-width: 480px) {
  .kpi-grid { grid-template-columns: 1fr; }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(99, 102, 241, 0.4);
}

/* --- Selection --- */
::selection {
  background: rgba(99, 102, 241, 0.3);
  color: var(--text-primary);
}

/* Utility classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-success { color: var(--color-success) !important; }
.text-danger { color: var(--color-danger) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-muted { color: var(--text-tertiary) !important; }
.mt-md { margin-top: var(--space-md); }
.mb-md { margin-bottom: var(--space-md); }
.gap-sm { gap: var(--space-sm); }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.hidden { display: none !important; }