/* ============================================
   Bus Tracking System - Main Design System
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.85);
    --bg-card-hover: rgba(51, 65, 85, 0.9);

    --accent-cyan: #06B6D4;
    --accent-cyan-light: #22D3EE;
    --accent-cyan-glow: rgba(6, 182, 212, 0.25);

    --driver-green: #059669;
    --driver-green-light: #10B981;
    --driver-green-glow: rgba(5, 150, 105, 0.25);

    --student-blue: #3B82F6;
    --student-blue-light: #60A5FA;
    --student-blue-glow: rgba(59, 130, 246, 0.25);

    --admin-purple: #7C3AED;
    --admin-purple-light: #A78BFA;
    --admin-purple-glow: rgba(124, 58, 237, 0.25);

    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;

    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #3B82F6;

    --border-color: rgba(148, 163, 184, 0.12);
    --border-light: rgba(148, 163, 184, 0.06);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow-cyan: 0 0 30px rgba(6, 182, 212, 0.15);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ---------- Bootstrap Dark Overrides ---------- */
.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), #0891B2);
    border: none;
    font-weight: 600;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-cyan-light), var(--accent-cyan));
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow-cyan);
}

.btn-success {
    background: linear-gradient(135deg, var(--driver-green), #047857);
    border: none;
}
.btn-success:hover {
    background: linear-gradient(135deg, var(--driver-green-light), var(--driver-green));
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #DC2626);
    border: none;
}

.btn-outline-light {
    border-color: var(--border-color);
    color: var(--text-secondary);
}
.btn-outline-light:hover {
    background: var(--bg-card);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* ---------- Glass Card ---------- */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
}
.glass-card:hover {
    border-color: rgba(6, 182, 212, 0.2);
    box-shadow: var(--shadow-md);
}

/* ---------- Stat Card ---------- */
.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), transparent);
}
.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}
.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 8px;
}
.stat-card .stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ---------- Form Overrides ---------- */
.form-control, .form-select {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    transition: var(--transition-fast);
    font-size: 0.9rem;
}
.form-control:focus, .form-select:focus {
    background: var(--bg-secondary);
    border-color: var(--accent-cyan);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px var(--accent-cyan-glow);
}
.form-control::placeholder {
    color: var(--text-muted);
}
.form-control:disabled, .form-select:disabled {
    background: var(--bg-tertiary);
    opacity: 0.6;
    cursor: not-allowed;
}
.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%2394A3B8' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
}
.form-label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    margin-bottom: 6px;
}
.form-check-input {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
}
.form-check-input:checked {
    background-color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}
.form-check-input:focus {
    box-shadow: 0 0 0 3px var(--accent-cyan-glow);
    border-color: var(--accent-cyan);
}
textarea.form-control {
    min-height: 80px;
    resize: vertical;
}
.input-group-text {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-muted);
}

/* ---------- Table ---------- */
.table-dark-custom {
    --bs-table-bg: transparent;
    --bs-table-hover-bg: var(--bg-card-hover);
    color: var(--text-primary);
}
.table-dark-custom thead th {
    background: var(--bg-tertiary);
    border-bottom: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 16px;
    white-space: nowrap;
}
.table-dark-custom tbody tr {
    transition: var(--transition-fast);
}
.table-dark-custom tbody tr:hover {
    background: rgba(6, 182, 212, 0.04);
}
.table-dark-custom tbody td {
    border-color: var(--border-light);
    padding: 12px 16px;
    vertical-align: middle;
    font-size: 0.9rem;
}

/* ---------- Badge ---------- */
.badge-online {
    background: rgba(16, 185, 129, 0.15);
    color: var(--driver-green-light);
    border: 1px solid rgba(16, 185, 129, 0.3);
    font-weight: 600;
    animation: pulse-badge 2s infinite;
}
.badge-offline {
    background: rgba(100, 116, 139, 0.15);
    color: var(--text-muted);
    border: 1px solid rgba(100, 116, 139, 0.3);
    font-weight: 600;
}
.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
    font-weight: 600;
}

/* ---------- Toast Notification ---------- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}
@keyframes pulse-badge {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}
@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px var(--accent-cyan-glow); }
    50% { box-shadow: 0 0 20px var(--accent-cyan-glow), 0 0 40px rgba(6, 182, 212, 0.1); }
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-fade-in-up {
    animation: fadeInUp 0.5s ease forwards;
}
.animate-fade-in {
    animation: fadeIn 0.4s ease forwards;
}
.animate-slide-in {
    animation: slideInRight 0.4s ease forwards;
}

/* Stagger animation delays */
.delay-1 { animation-delay: 0.1s; opacity: 0; }
.delay-2 { animation-delay: 0.2s; opacity: 0; }
.delay-3 { animation-delay: 0.3s; opacity: 0; }
.delay-4 { animation-delay: 0.4s; opacity: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .stat-card .stat-value {
        font-size: 1.4rem;
    }
    .glass-card {
        padding: 16px;
    }
}

/* ---------- Utilities ---------- */

/* Loading spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}
.empty-state i {
    font-size: 3rem;
    display: block;
    margin-bottom: 16px;
    opacity: 0.5;
}
.empty-state p {
    font-size: 0.95rem;
    margin-bottom: 16px;
}

/* Alert overrides */
.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
    color: #6EE7B7;
}
.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #FCA5A5;
}
.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
    color: #FCD34D;
}
.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
    color: #93C5FD;
}

/* Selection */
::selection {
    background: var(--accent-cyan);
    color: white;
}

/* Smooth page transitions */
.page-transition {
    animation: fadeInUp 0.4s ease;
}