/* ============================================
   DRIVELINE - Clean Minimalist Design
   ============================================ */

:root {
    --primary-color: #2563eb;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --bg-white: #ffffff;
    --bg-gray: #f9fafb;
    --bg-hover: #f3f4f6;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background: #ffffff;
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* ============================================
   NAVIGATION - Clean & Simple
   ============================================ */

.navbar {
    background: var(--bg-white) !important;
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    box-shadow: none;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary) !important;
    letter-spacing: -0.5px;
}

.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 1rem !important;
    margin: 0 0.25rem;
    border-radius: 6px;
    transition: all 0.15s ease;
}

.navbar-nav .nav-link:hover {
    background: var(--bg-hover);
    color: var(--text-primary) !important;
}

.navbar-nav .nav-link.active {
    background: var(--bg-gray);
    color: var(--primary-color) !important;
    font-weight: 600;
}

/* ============================================
   CARDS - Clean with Borders
   ============================================ */

.card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: none;
    margin-bottom: 1.5rem;
    transition: none;
}

.card:hover {
    transform: none;
    box-shadow: none;
}

.card-header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    border-radius: 8px 8px 0 0 !important;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.card-body {
    padding: 1.5rem;
}

/* ============================================
   STAT CARDS - Minimal Colors
   ============================================ */

.card.bg-primary {
    background: var(--bg-white) !important;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    box-shadow: none;
}

.card.bg-primary .card-body {
    color: var(--text-primary);
}

.card.bg-primary h4,
.card.bg-primary h6 {
    color: var(--text-primary);
}

.card.bg-primary small {
    color: var(--text-secondary);
}

.card.bg-success {
    background: var(--bg-white) !important;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--success-color);
    box-shadow: none;
}

.card.bg-success .card-body {
    color: var(--text-primary);
}

.card.bg-success h4,
.card.bg-success h6 {
    color: var(--text-primary);
}

.card.bg-success small {
    color: var(--text-secondary);
}

.card.bg-info {
    background: var(--bg-white) !important;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    box-shadow: none;
}

.card.bg-info .card-body {
    color: var(--text-primary);
}

.card.bg-info h4,
.card.bg-info h6 {
    color: var(--text-primary);
}

.card.bg-info small {
    color: var(--text-secondary);
}

.card.bg-warning {
    background: var(--bg-white) !important;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--warning-color);
    box-shadow: none;
}

.card.bg-warning .card-body {
    color: var(--text-primary);
}

.card.bg-warning h4,
.card.bg-warning h6 {
    color: var(--text-primary);
}

.card.bg-warning small {
    color: var(--text-secondary);
}

.card h2,
.card h4 {
    margin: 0.5rem 0 0 0;
    font-weight: 700;
    color: var(--text-primary);
}

.card h2 {
    font-size: 2rem;
}

.card h4 {
    font-size: 1.75rem;
}

.card h6 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

/* ============================================
   BUTTONS - Simple & Clean
   ============================================ */

.btn {
    border-radius: 6px;
    font-weight: 500;
    padding: 0.6rem 1.25rem;
    border: 1px solid var(--border-color);
    transition: all 0.15s ease;
    box-shadow: none;
    font-size: 0.9rem;
}

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

.btn-primary:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
    transform: none;
    box-shadow: none;
}

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

.btn-success:hover {
    background: #059669;
    border-color: #059669;
}

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

.btn-danger:hover {
    background: #dc2626;
    border-color: #dc2626;
}

.btn-secondary {
    background: var(--bg-white);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-gray);
    border-color: var(--border-color);
}

.btn-outline-danger {
    background: transparent;
    border-color: var(--danger-color);
    color: var(--danger-color);
}

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

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* ============================================
   TABLES - Clean & Readable
   ============================================ */

.table {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.table thead th {
    background: var(--bg-gray);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-primary);
    text-transform: none;
    font-size: 0.875rem;
    padding: 0.95rem 1rem;
    letter-spacing: 0;
}

.table tbody td {
    padding: 0.95rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table-hover tbody tr {
    transition: background-color 0.15s ease;
}

.table-hover tbody tr:hover {
    background: var(--bg-gray);
    transform: none;
    box-shadow: none;
}

.table-responsive {
    border-radius: 8px;
    overflow: hidden;
}

/* ============================================
   FORMS - Clean Input Style
   ============================================ */

.form-control,
.form-select {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.625rem 0.875rem;
    transition: all 0.15s ease;
    font-size: 0.9rem;
    color: var(--text-primary);
    background: var(--bg-white);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

.form-label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

/* ============================================
   ALERTS - Clean Notifications
   ============================================ */

.alert {
    border: 1px solid;
    border-radius: 6px;
    padding: 1rem 1.25rem;
    box-shadow: none;
    background: var(--bg-white);
}

.alert-success {
    border-color: var(--success-color);
    color: var(--success-color);
    background: #f0fdf4;
}

.alert-danger {
    border-color: var(--danger-color);
    color: var(--danger-color);
    background: #fef2f2;
}

.alert-info {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: #eff6ff;
}

.alert-warning {
    border-color: var(--warning-color);
    color: var(--warning-color);
    background: #fffbeb;
}

/* ============================================
   BADGES - Simple Tags
   ============================================ */

.badge {
    padding: 0.35em 0.7em;
    font-size: 0.8em;
    font-weight: 500;
    border-radius: 4px;
    letter-spacing: 0;
}

.badge.bg-primary {
    background: var(--primary-color) !important;
}

.badge.bg-success {
    background: var(--success-color) !important;
}

.badge.bg-danger {
    background: var(--danger-color) !important;
}

.badge.bg-info {
    background: var(--primary-color) !important;
}

/* ============================================
   CONTAINER & SPACING
   ============================================ */

.container {
    max-width: 1400px;
    padding-top: 2rem;
}

.mt-4 {
    margin-top: 2rem !important;
}

.mb-4 {
    margin-bottom: 2rem !important;
}

/* ============================================
   TEXT UTILITIES
   ============================================ */

.text-success {
    color: var(--success-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

.text-muted {
    color: var(--text-muted) !important;
}

.text-secondary {
    color: var(--text-secondary) !important;
}

strong {
    font-weight: 600;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .card h2 {
        font-size: 1.5rem;
    }
    
    .card h4 {
        font-size: 1.35rem;
    }
    
    .container {
        padding-top: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
}

/* ============================================
   SCROLLBAR - Minimal
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-gray);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}