/* Main Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

/* Navigation */
.navbar-brand {
    font-weight: 600;
}

/* Hero Section */
.hero-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero-section h1 {
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-section .lead {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    margin-bottom: 20px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.card-header {
    background-color: white;
    border-bottom: 2px solid var(--light-color);
    font-weight: 600;
}

/* Tables */
.table th {
    font-weight: 600;
    background-color: var(--light-color);
    border-top: none;
}

.table-hover tbody tr:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

/* Progress Bars */
.progress {
    border-radius: 10px;
    height: 25px;
}

.progress-bar {
    border-radius: 10px;
}

/* Buttons */
.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 10px 20px;
    transition: all 0.3s;
}

.btn-lg {
    padding: 12px 30px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 48px 0 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
}

.sidebar-sticky {
    position: relative;
    top: 0;
    height: calc(100vh - 48px);
    padding-top: .5rem;
    overflow-x: hidden;
    overflow-y: auto;
}

.sidebar .nav-link {
    font-weight: 500;
    color: #333;
    padding: 10px 20px;
    margin: 2px 10px;
    border-radius: 8px;
}

.sidebar .nav-link:hover {
    background-color: var(--light-color);
}

.sidebar .nav-link.active {
    color: var(--primary-color);
    background-color: rgba(52, 152, 219, 0.1);
    border-left: 4px solid var(--secondary-color);
}

/* Form Controls */
.form-control, .form-select {
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 10px 15px;
    transition: all 0.3s;
}

.form-control:focus, .form-select:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

/* Badges */
.badge {
    padding: 8px 12px;
    border-radius: 20px;
    font-weight: 500;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 10px;
    padding: 15px 20px;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #dee2e6 !important;
    }
    
    .table {
        border-collapse: collapse !important;
    }
    
    .table th, .table td {
        border: 1px solid #dee2e6 !important;
    }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .hero-section {
        padding: 40px 0;
        text-align: center;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .card-body {
        padding: 15px;
    }
}