/**
 * Enhanced UI/UX Styles
 * Modern, accessible, and responsive design improvements
 */

/* ============================================
   MOBILE-FIRST TOUCH OPTIMIZATIONS
   ============================================ */

/* Prevent tap highlight flash on interactive elements */
a, button, input, select, textarea, .btn, .card, .nav-link, .form-check-label {
    -webkit-tap-highlight-color: rgba(13, 110, 253, 0.1);
}

/* Prevent pull-to-refresh interference on form pages */
html {
    overscroll-behavior-y: contain;
}

/* Touch-friendly targets on mobile */
@media (max-width: 768px) {
    .form-control,
    .form-select {
        min-height: 48px;
        font-size: 16px;
    }

    .btn {
        min-height: 44px;
        touch-action: manipulation;
    }

    .form-check-input {
        width: 1.5em;
        height: 1.5em;
        margin-top: 0;
    }

    .form-check-label {
        padding-left: 0.25rem;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    body {
        padding-bottom: env(safe-area-inset-bottom, 0px);
    }
}

/* Touch feedback for coarse pointers (touch screens) */
@media (pointer: coarse) {
    .btn:active {
        transform: scale(0.97);
        transition: transform 0.1s ease;
    }

    .list-group-item:active {
        background-color: rgba(13, 110, 253, 0.05);
    }
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .compact-progress-bar-fill::after,
    .progress-bar::after {
        animation: none;
    }

    .form-group {
        animation: none;
    }
}

/* Improved form styling */
.form-control:focus,
.form-select:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.15);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control.is-valid,
.form-select.is-valid {
    border-color: #198754;
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: #dc3545;
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875em;
    color: #dc3545;
}

.form-control.is-invalid ~ .invalid-feedback,
.form-select.is-invalid ~ .invalid-feedback {
    display: block;
}

/* Enhanced card styling */
.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

@media (hover: hover) and (pointer: fine) {
    .card:hover {
        transform: translateY(-2px);
        box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    }
}

/* Improved button styling */
.btn {
    font-weight: 500;
    padding: 0.5rem 1.25rem;
    transition: all 0.2s ease-in-out;
    border-radius: 0.375rem;
}

@media (hover: hover) and (pointer: fine) {
    .btn:hover {
        transform: translateY(-1px);
        box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.15);
    }
}

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

.btn-success {
    background: linear-gradient(135deg, #198754 0%, #157347 100%);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
    border: none;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.1rem;
}

/* Loading spinner for buttons */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.2em;
}

/* Enhanced navigation tabs */
.nav-pills .nav-link {
    border-radius: 0.375rem;
    padding: 0.75rem 1.25rem;
    font-weight: 500;
    transition: all 0.2s ease-in-out;
    color: #495057;
}

.nav-pills .nav-link:hover {
    background-color: #e9ecef;
    color: #0d6efd;
}

.nav-pills .nav-link.active {
    background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
    box-shadow: 0 0.25rem 0.5rem rgba(13, 110, 253, 0.3);
}

.nav-pills .nav-link i {
    margin-right: 0.5rem;
}

/* Breadcrumb improvements */
.breadcrumb {
    background-color: transparent;
    padding: 1rem 0;
    margin-bottom: 1rem;
}

.breadcrumb-item.active {
    color: #6c757d;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    font-size: 1.2rem;
    color: #6c757d;
}

/* Alert enhancements */
.alert {
    border: none;
    border-left: 4px solid;
    border-radius: 0.375rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.alert-info {
    background-color: #cfe2ff;
    border-left-color: #0d6efd;
    color: #084298;
}

.alert-warning {
    background-color: #fff3cd;
    border-left-color: #ffc107;
    color: #997404;
}

.alert-danger {
    background-color: #f8d7da;
    border-left-color: #dc3545;
    color: #842029;
}

.alert-success {
    background-color: #d1e7dd;
    border-left-color: #198754;
    color: #0f5132;
}

/* Form section headers */
.form-text.text-info {
    font-size: 1.25rem;
    font-weight: 600;
    color: #0d6efd !important;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e9ecef;
}

.form-text.text-info i {
    margin-right: 0.5rem;
}

/* Improved form group spacing */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.5rem;
}

/* Accessibility improvements */
.form-control:focus,
.form-select:focus,
.btn:focus {
    outline: 2px solid #0d6efd;
    outline-offset: 2px;
}

/* Skip to main content link for screen readers */
.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: #0d6efd;
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-to-main:focus {
    top: 0;
}

/* Responsive improvements */
@media (max-width: 768px) {
    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }

    .nav-pills .nav-link {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .card {
        margin-bottom: 0.75rem;
        border-radius: 0.5rem;
    }

    .card-body {
        padding: 1rem;
    }

    .alert {
        padding: 0.75rem;
        margin-bottom: 0.75rem;
        font-size: 0.9rem;
    }

    .alert h5 {
        font-size: 1rem;
    }

    /* Full-bleed form section headers for visual breaks */
    .form-text.text-info {
        font-size: 1rem;
        padding: 0.75rem;
        margin-left: -1rem;
        margin-right: -1rem;
        background: linear-gradient(135deg, #e7f1ff 0%, #f0f7ff 100%);
        border-left: 4px solid #0d6efd;
        border-bottom: none;
        border-radius: 0;
    }
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-overlay.show {
    display: flex;
}

.loading-overlay .spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.3em;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus visible for better keyboard navigation */
*:focus-visible {
    outline: 2px solid #0d6efd;
    outline-offset: 2px;
}

/* Improved table styling (if any tables are used) */
.table {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.table thead {
    background-color: #f8f9fa;
    font-weight: 600;
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }

    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }

    .btn {
        display: none;
    }
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Animation utilities */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

/* Improved checkbox and radio styling */
.form-check-input {
    width: 1.25em;
    height: 1.25em;
    margin-top: 0.125em;
    cursor: pointer;
}

.form-check-input:checked {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.form-check-label {
    cursor: pointer;
    margin-left: 0.5rem;
    font-weight: 500;
}

/* Enhanced footer */
.footer {
    background-color: #f8f9fa;
    padding: 1.5rem 0;
    margin-top: 3rem;
    box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.05);
}

/* Utility classes for better spacing */
.mt-6 {
    margin-top: 4rem !important;
}

.mb-6 {
    margin-bottom: 4rem !important;
}

.py-6 {
    padding-top: 4rem !important;
    padding-bottom: 4rem !important;
}

/* Enhanced validation display */
.field-validation-error {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875em;
    color: #dc3545;
    font-weight: 500;
}

.field-validation-valid {
    display: none;
}

.input-validation-error {
    border-color: #dc3545 !important;
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.input-validation-error:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.25rem rgba(220, 53, 69, 0.25);
}

/* Validation summary enhancements */
.validation-summary-errors {
    display: none; /* Hide default, use custom instead */
}

/* Required field indicator */
.form-label .text-danger,
.form-label > span.text-danger {
    font-weight: 700;
    font-size: 1.1em;
}

/* Form section styling improvements */
.card-body form .row {
    margin-bottom: 0;
}

.card-body form .form-group {
    margin-bottom: 1.25rem;
}

/* Sticky header for long forms */
.sticky-form-header {
    position: sticky;
    top: 70px;
    z-index: 100;
    background: white;
    padding: 1rem;
    margin: -1rem -1rem 1rem -1rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-radius: 0.375rem 0.375rem 0 0;
}

/* Compact Sticky Progress Bar */
.compact-progress-bar {
    position: sticky;
    top: 0;
    z-index: 999;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-bottom: 2px solid #e9ecef;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.compact-progress-bar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    gap: 1.5rem;
}

.compact-progress-steps {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
}

.compact-step {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    cursor: default;
}

.compact-step-icon {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: #e9ecef;
    color: #adb5bd;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.compact-step.active .compact-step-icon {
    background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(13, 110, 253, 0.4);
}

.compact-step.completed .compact-step-icon {
    background: linear-gradient(135deg, #198754 0%, #157347 100%);
    color: white;
}

.compact-step-text {
    font-size: 0.75rem;
    font-weight: 600;
    color: #6c757d;
    white-space: nowrap;
    transition: color 0.3s ease;
}

.compact-step.active .compact-step-text {
    color: #0d6efd;
    font-weight: 700;
}

.compact-step.completed .compact-step-text {
    color: #198754;
}

.compact-step-divider {
    width: 1.5rem;
    height: 2px;
    background: linear-gradient(90deg, #e9ecef 0%, #dee2e6 100%);
    flex-shrink: 0;
}

.compact-progress-bar-track {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: #e9ecef;
}

.compact-progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #0d6efd 0%, #0b5ed7 100%);
    transition: width 0.6s ease;
    position: relative;
    overflow: hidden;
}

.compact-progress-bar-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.compact-progress-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.compact-progress-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: #495057;
}

.compact-progress-percent {
    font-size: 0.875rem;
    font-weight: 700;
    color: #0d6efd;
    min-width: 3rem;
    text-align: right;
}

/* Mobile responsiveness for compact progress */
@media (max-width: 992px) {
    .compact-progress-bar-inner {
        padding: 0.5rem 1rem;
        gap: 1rem;
    }

    .compact-step-text {
        font-size: 0.7rem;
    }

    .compact-step-icon {
        width: 1.75rem;
        height: 1.75rem;
        font-size: 0.75rem;
    }

    .compact-step-divider {
        width: 1rem;
    }

    .compact-progress-info {
        gap: 0.75rem;
    }
}

@media (max-width: 768px) {
    .compact-progress-bar-inner {
        flex-direction: column;
        gap: 0.25rem;
        padding: 0.5rem 0.75rem;
    }

    .compact-progress-steps {
        width: 100%;
        justify-content: space-between;
        gap: 0.25rem;
    }

    .compact-step-text {
        display: none; /* Hide text on mobile - icons are sufficient */
    }

    .compact-step-icon {
        width: 2rem;
        height: 2rem;
        font-size: 0.8rem;
    }

    .compact-step-divider {
        flex: 1;
        min-width: 0.25rem;
        height: 2px;
    }

    .compact-step {
        position: relative;
        padding: 4px;
        min-width: 2.5rem;
        min-height: 2.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .compact-progress-info {
        width: 100%;
        justify-content: space-between;
        font-size: 0.75rem;
    }

    .compact-progress-label {
        font-size: 0.75rem;
        font-weight: 700;
    }

    .compact-progress-percent {
        font-size: 0.8rem;
    }
}

/* Tooltip on hover for mobile */
@media (max-width: 768px) {
    .compact-step {
        position: relative;
    }

    .compact-step:active .compact-step-text {
        display: block;
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%);
        background: #212529;
        color: white;
        padding: 0.25rem 0.5rem;
        border-radius: 0.25rem;
        margin-top: 0.5rem;
        z-index: 1000;
        white-space: nowrap;
        font-size: 0.7rem;
    }

    .compact-step:active .compact-step-text::before {
        content: '';
        position: absolute;
        bottom: 100%;
        left: 50%;
        transform: translateX(-50%);
        border: 4px solid transparent;
        border-bottom-color: #212529;
    }
}

/* Scroll effect - add shadow when scrolled */
.compact-progress-bar.scrolled {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

/* Progress bar enhancements (general) */
.progress {
    background-color: #e9ecef;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    background: linear-gradient(90deg, #0d6efd 0%, #0b5ed7 100%);
    transition: width 0.6s ease;
    position: relative;
    overflow: visible;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

/* Help text styling */
.form-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875em;
    color: #6c757d;
}

.form-text.text-muted {
    font-style: italic;
}

/* Animated form labels */
.form-floating-custom {
    position: relative;
}

.form-floating-custom label {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    transition: all 0.2s ease;
    pointer-events: none;
    color: #6c757d;
}

.form-floating-custom input:focus ~ label,
.form-floating-custom input:not(:placeholder-shown) ~ label {
    top: -0.5rem;
    left: 0.5rem;
    font-size: 0.75rem;
    background: white;
    padding: 0 0.25rem;
    color: #0d6efd;
}

/* Improved select dropdowns */
.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    transition: all 0.2s ease;
}

.form-select:focus {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%230d6efd' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
}

/* Card improvements for forms */
.card-body {
    padding: 1.5rem;
}

@media (min-width: 768px) {
    .card-body {
        padding: 2rem;
    }
}

/* Tooltip improvements */
[data-bs-toggle="tooltip"] {
    cursor: help;
    border-bottom: 1px dotted #6c757d;
}

/* Success state improvements */
.alert-success {
    background: linear-gradient(135deg, #d1e7dd 0%, #badbcc 100%);
    border-left-color: #198754;
}

.alert-success i {
    color: #198754;
}

/* Input group enhancements */
.input-group {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    border-radius: 0.375rem;
    transition: box-shadow 0.2s ease;
}

.input-group:focus-within {
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.15);
}

/* Better mobile form experience */
@media (max-width: 576px) {
    .form-control,
    .form-select {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .btn-lg:only-child,
    .d-grid .btn-lg {
        width: 100%;
    }

    .btn-lg {
        padding: 0.625rem 1.25rem;
        font-size: 1rem;
    }
}

/* Form animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-group {
    animation: fadeInUp 0.3s ease-out;
}

/* Disabled state improvements */
.form-control:disabled,
.form-select:disabled {
    background-color: #f8f9fa;
    opacity: 0.7;
    cursor: not-allowed;
}

/* Focus ring improvements */
.form-control:focus,
.form-select:focus,
.btn:focus {
    outline: none;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* Better contrast for placeholders */
.form-control::placeholder {
    color: #adb5bd;
    opacity: 1;
}

/* Icon inside input fields */
.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
}

.input-with-icon .form-control {
    padding-left: 2.5rem;
}

/* ============================================
   MOBILE STICKY SUBMIT BAR
   ============================================ */
.mobile-sticky-submit {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.5rem 1rem;
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom, 0px));
    background: white;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.15);
    z-index: 998;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.mobile-sticky-submit.visible {
    transform: translateY(0);
}

/* Collapsible form section styling */
.form-section-header {
    cursor: pointer;
    padding: 0.5rem 0;
}

.form-section-header .section-toggle-icon {
    transition: transform 0.3s ease;
    font-size: 1.25rem;
    color: #6c757d;
}

.form-section-header.collapsed .section-toggle-icon {
    transform: rotate(180deg);
}

/* Mobile-specific layout helpers */
@media (max-width: 767.98px) {
    /* Add padding at bottom of forms to clear sticky submit bar */
    .mobile-form-padded {
        padding-bottom: 80px;
    }
}

/* Touch-friendly exam answer choices */
@media (max-width: 768px) {
    .question-card .form-check {
        padding: 0.75rem;
        margin: 0.25rem 0;
        background: #f8f9fa;
        border-radius: 0.5rem;
        border: 2px solid transparent;
        transition: all 0.2s ease;
    }

    .question-card .form-check:has(input:checked) {
        background: #e7f1ff;
        border-color: #0d6efd;
    }

    .question-card .form-check-input {
        width: 1.5em;
        height: 1.5em;
    }

    .question-card .form-check-label {
        font-size: 0.95rem;
        line-height: 1.4;
    }
}

/* Mobile material list stacked layout */
@media (max-width: 768px) {
    .material-item.list-group-item {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 0.75rem;
        padding: 1rem !important;
    }

    .material-item .btn-preview-material {
        width: 100%;
        min-height: 48px;
        font-size: 1rem;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* Mobile modal footer buttons */
@media (max-width: 768px) {
    .modal-fullscreen-md-down .modal-footer .btn {
        min-height: 48px;
        font-size: 1rem;
        flex: 1;
    }
}