:root {
    --primary-color: #4e73df;
    --secondary-color: #1cc88a;
    --danger-color: #e74a3b;
    --warning-color: #f6c23e;
    --dark-color: #5a5c69;
    --light-color: #f8f9fc;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fc;
}

/* Navbar Styles */
.navbar {
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 100px 0;
    margin-bottom: 50px;
}

/* Card Styles */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card-img-top {
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    height: 200px;
    object-fit: cover;
}

/* Dashboard Cards */
.dashboard-card {
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
}

.dashboard-card .card-title {
    color: var(--dark-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.dashboard-card .card-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Progress Bar */
.progress {
    height: 10px;
    border-radius: 5px;
}

.progress-bar {
    background-color: var(--secondary-color);
}

/* Table Styles */
.table {
    background: white;
    border-radius: 10px;
    overflow: hidden;
}

.table thead th {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem;
}

/* Button Styles */
.btn {
    border-radius: 5px;
    padding: 0.5rem 1.5rem;
    font-weight: 500;
}

.btn-primary {
    background-color: var(--primary-color);
    border: none;
}

.btn-primary:hover {
    background-color: #224abe;
}

.btn-success {
    background-color: var(--secondary-color);
    border: none;
}

/* Form Styles */
.form-control {
    border-radius: 5px;
    border: 1px solid #d1d3e2;
    padding: 0.75rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

/* Footer */
footer {
    margin-top: auto;
}

footer a:hover {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 50px 0;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .dashboard-card {
        margin-bottom: 1rem;
    }
}

/* Certificate Preview */
.certificate-preview {
    background: white;
    padding: 2rem;
    border: 2px solid #ddd;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

/* Task List */
.task-item {
    border-left: 3px solid var(--primary-color);
    padding: 1rem;
    margin-bottom: 1rem;
    background: white;
    border-radius: 5px;
}

.task-item.completed {
    border-left-color: var(--secondary-color);
    opacity: 0.8;
}

/* Submission Status */
.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.status-pending {
    background-color: #fff3cd;
    color: #856404;
}

.status-approved {
    background-color: #d4edda;
    color: #155724;
}

.status-rejected {
    background-color: #f8d7da;
    color: #721c24;
}