/* Custom styles for MCQ Exam System */

/* General Styles */
:root {
    --primary-color: #4e73df;
    --secondary-color: #858796;
    --success-color: #1cc88a;
    --info-color: #36b9cc;
    --warning-color: #f6c23e;
    --danger-color: #e74a3b;
    --dark-color: #5a5c69;
    --light-color: #f8f9fc;
}

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

body {
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--light-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Card Styles */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.card-header {
    border-radius: 15px 15px 0 0 !important;
    border-bottom: none;
    padding: 15px 20px;
}

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

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn:active {
    transform: translateY(0);
}

/* Form Styles */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #e3e6f0;
    padding: 10px 15px;
    font-size: 14px;
}

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

/* Table Styles */
.table {
    margin-bottom: 0;
}

.table thead th {
    border-top: none;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
    color: var(--secondary-color);
}

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

/* Modal Styles */
.modal-content {
    border: none;
    border-radius: 15px;
}

.modal-header {
    border-radius: 15px 15px 0 0;
    padding: 15px 20px;
}

.modal-footer {
    border-top: none;
    padding: 15px 20px;
}

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

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

/* Badge Styles */
.badge {
    padding: 5px 10px;
    border-radius: 5px;
    font-weight: 600;
}

/* Mobile Specific */
@media (max-width: 576px) {
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.2rem; }
    h4 { font-size: 1.1rem; }
    h5 { font-size: 1rem; }
    h6 { font-size: 0.9rem; }
    
    .btn {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .table {
        font-size: 12px;
    }
    
    .table td, .table th {
        padding: 8px 5px;
        white-space: nowrap;
    }
    
    .table-responsive {
        border: none;
        margin-bottom: 0;
    }
    
    .card-header {
        padding: 12px 15px;
    }
    
    .modal-dialog {
        margin: 10px;
    }
    
    .modal-body {
        padding: 15px;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .btn, .nav-link, .dropdown-item {
        padding: 12px 16px;
    }
    
    input, select, textarea {
        font-size: 16px !important;
    }
}

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

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

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Question Card Styles */
.question-card {
    background: white;
    border-radius: 10px;
    transition: all 0.3s;
}

.question-card:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

/* Option Styles */
.form-check {
    padding: 10px;
    border-radius: 8px;
    transition: background 0.3s;
}

.form-check:hover {
    background: #f8f9fc;
}

.form-check-input {
    margin-top: 3px;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Timer Styles */
.exam-timer {
    background: linear-gradient(135deg, var(--primary-color), #224abe);
    color: white;
    font-weight: bold;
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 12px 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Stats Card */
.stats-card {
    background: white;
    border-radius: 15px;
    padding: 20px;
    height: 100%;
    transition: all 0.3s;
}

.stats-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

/* Topic Grid */
.topic-card {
    background: white;
    border-radius: 15px;
    padding: 20px 15px;
    text-align: center;
    transition: all 0.3s;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.topic-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    background: linear-gradient(135deg, var(--primary-color), #224abe);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #224abe;
}

/* Print Styles */
@media print {
    .navbar, .footer, .btn, .no-print {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}