/* Base Styles */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #48bb78;
    --danger-color: #f56565;
    --warning-color: #ed8936;
    --info-color: #4299e1;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f7f9fc;
    color: #333;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
    height: 100%;
}

html {
    height: 100%;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
}

/* Main Layout */
.main-content {
    flex: 1;
    display: block;
    min-height: calc(100vh - 80px);
    width: 100%;
    padding-bottom: 120px;
}

.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #f8f9fa;
    border-top: 1px solid #dee2e6;
    padding: 20px 0;
    width: 100%;
    z-index: 1000;
}

/* Navigation Bar */
.navbar-dark {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 20px;
    letter-spacing: 0.5px;
}

.navbar-brand i {
    margin-right: 8px;
}

/* Cards and Containers */
.card {
    border: none;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* Welcome Card */
.welcome-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.3);
}

.welcome-card h1 {
    font-weight: 700;
    margin-bottom: 10px;
}

/* Stat Cards */
.stat-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.stat-content h3 {
    margin: 0;
    font-size: 28px;
    font-weight: 700;
    color: #333;
}

.stat-content p {
    margin: 5px 0 0 0;
    color: #999;
    font-size: 14px;
}

/* Module Cards */
.module-card {
    border: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.module-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15);
}

.module-icon {
    font-size: 48px;
    transition: all 0.3s ease;
}

.module-card:hover .module-icon {
    transform: scale(1.1);
}

.module-card .card-title {
    font-weight: 700;
    color: #333;
    margin-top: 10px;
}

.module-card .card-text {
    font-size: 14px;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border-left: 4px solid #22c55e;
}

.alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border-left: 4px solid #ef4444;
}

.alert-warning {
    background-color: #fffbeb;
    color: #92400e;
    border-left: 4px solid #f59e0b;
}

.alert-info {
    background-color: #f0f9ff;
    color: #0c2d6b;
    border-left: 4px solid #3b82f6;
}

/* Buttons */
.btn {
    border-radius: 8px;
    font-weight: 600;
    padding: 10px 20px;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
    color: white;
}

.btn-success {
    background-color: #48bb78;
    border: none;
    color: white;
}

.btn-success:hover {
    background-color: #38a169;
    color: white;
}

/* Tables */
.table {
    border-collapse: collapse;
}

.table thead th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #555;
    border: none;
    padding: 15px;
}

.table tbody td {
    padding: 15px;
    border-bottom: 1px solid #e0e0e0;
}

.table tbody tr:hover {
    background-color: #f9f9f9;
}

/* Forms */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    padding: 10px 15px;
    font-size: 15px;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-label {
    font-weight: 600;
    color: #555;
    margin-bottom: 8px;
}

/* List Groups */
.list-group-item {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    margin-bottom: 8px;
    padding: 12px 16px;
    transition: all 0.3s ease;
}

.list-group-item:first-child {
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.list-group-item:last-child {
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
}

.list-group-item.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
    color: white;
}

.list-group-item i {
    margin-right: 10px;
    width: 20px;
}

/* Hover Effects */
.hover-shadow {
    transition: box-shadow 0.3s ease;
}

.hover-shadow:hover {
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15) !important;
}

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        min-height: calc(100vh - 60px);
        padding-bottom: 60px;
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
        padding: 15px;
    }
    
    .module-card {
        margin-bottom: 15px;
    }
    
    .navbar-brand {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 0.5rem 0;
    }
    
    .container, .container-fluid {
        padding: 10px;
    }
    
    .card {
        border-radius: 8px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 14px;
    }
}