/* Modern Clean Light Theme (Strictly Light Backgrounds - No Dark Themes) */
:root {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-focus: #2563eb;
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eff6ff;
  --primary-border: #bfdbfe;

  --success: #059669;
  --success-hover: #047857;
  --success-soft: #ecfdf5;
  --success-border: #a7f3d0;

  --warning: #d97706;
  --warning-soft: #fffbeb;
  --warning-border: #fde68a;

  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --danger-soft: #fef2f2;
  --danger-border: #fecaca;

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08), 0 1px 2px -1px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Vector SVG Icon Styles */
.svg-icon {
  width: 18px;
  height: 18px;
  stroke-width: 2;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

.svg-icon-lg {
  width: 24px;
  height: 24px;
}

.svg-icon-xl {
  width: 32px;
  height: 32px;
}

/* Navbar */
.navbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 40;
  box-shadow: var(--shadow-xs);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
}

.brand-icon-box {
  width: 34px;
  height: 34px;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-badge {
  background: var(--bg-subtle);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Main Container */
.container {
  max-width: 1100px;
  margin: 1.75rem auto;
  padding: 0 1.25rem;
  width: 100%;
  flex: 1;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-xs);
  margin-bottom: 1.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-success {
  background: var(--success);
  color: white;
}
.btn-success:hover {
  background: var(--success-hover);
}

.btn-danger {
  background: var(--danger);
  color: white;
}
.btn-danger:hover {
  background: var(--danger-hover);
}

.btn-outline {
  background: white;
  border-color: var(--border-strong);
  color: var(--text-main);
}
.btn-outline:hover {
  background: var(--bg-subtle);
  border-color: #94a3b8;
}

.btn-sm {
  padding: 0.38rem 0.75rem;
  font-size: 0.825rem;
}

/* Inputs & Form Controls */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-size: 0.925rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: white;
  color: var(--text-main);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.875rem;
}

/* Auth Modal */
.auth-overlay {
  position: fixed;
  inset: 0;
  background: rgba(248, 250, 252, 0.94);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.auth-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.auth-card .icon-box {
  width: 48px;
  height: 48px;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

.stat-box {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
}

.stat-box.pending {
  border-top: 3px solid var(--warning);
}
.stat-box.called {
  border-top: 3px solid var(--success);
}
.stat-box.total {
  border-top: 3px solid var(--primary);
}
.stat-box.duplicates {
  border-top: 3px solid var(--danger);
}

.stat-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 0.35rem;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0.35rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
}

.tab-btn {
  background: none;
  border: none;
  padding: 0.65rem 1.1rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.15s ease;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Number Cards */
.number-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.number-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.15rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-xs);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.number-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.phone-digits {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-main);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
}

.badge-pending {
  background: var(--warning-soft);
  color: #b45309;
  border: 1px solid var(--warning-border);
}

.badge-called {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.badge-neutral {
  background: var(--bg-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* Alert Notification */
.alert {
  padding: 0.9rem 1.15rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.alert-warning {
  background: var(--warning-soft);
  color: #92400e;
  border: 1px solid var(--warning-border);
}

/* Split Columns */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 860px) {
  .split-grid {
    grid-template-columns: 1fr;
  }
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #1e293b;
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  display: none;
  z-index: 999;
}