@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

:root {
    --em-primary: #1267e3;
    --em-secondary: #0f4c75;
    --em-accent: #4dabf7;
    --em-success: #28a745;
    --em-warning: #ffc107;
    --em-error: #dc3545;
    --em-gold: #FFC145;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-muted: #eaecf0;
    --text-dark: #1a1d20;
    --text-light: #ffffff;
    --text-muted: #6c737f;
    --border-color: #d9dce1;
    --radius: 0.5rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-white);
    color: var(--text-dark);
    font-size: 14px;
    line-height: 1.6;
}

/* ---- NAVBAR (Academy style: white bg, bottom border, blue active indicator) ---- */
.navbar {
    background-color: var(--bg-white) !important;
    border-bottom: 1px solid #e5e7eb;
    padding: 0;
    height: 64px;
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    max-width: 98vw;
    height: 100%;
    display: flex;
    align-items: center;
}

.navbar-brand {
    font-weight: 500;
    font-size: 1.05rem;
    color: var(--em-primary) !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand i {
    color: var(--em-primary);
}

.nav-link {
    color: #6b7280 !important;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 1.25rem 0.75rem !important;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
    margin: 0 0.25rem;
}

.nav-link:hover {
    color: #374151 !important;
}

.nav-link.active,
.nav-link:focus {
    color: var(--em-primary) !important;
    border-bottom-color: var(--em-primary);
}

.navbar-toggler {
    border-color: var(--border-color);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2890,90,90,0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ---- TYPOGRAPHY ---- */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    color: var(--text-dark);
}

h2 { font-size: 1.5rem; }
h5 { font-size: 1.1rem; }

.text-muted {
    color: var(--text-muted) !important;
}

/* ---- CONTAINER ---- */
.container {
    max-width: 98vw;
}

/* ---- CARDS (Academy style: white, subtle border, small shadow) ---- */
.card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    font-weight: 500;
    padding: 1rem 1.5rem;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
}

.card-body {
    padding: 1.5rem;
}

.card-header.bg-primary {
    background-color: var(--em-primary) !important;
    border-color: var(--em-primary);
}

.card-header.bg-white {
    background-color: var(--bg-white) !important;
}

/* ---- STAT CARDS ---- */
.stat-card {
    text-align: center;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card .stat-number {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
}

.stat-card .stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-top: 0.5rem;
    font-weight: 500;
}

/* ---- BUTTONS (Academy style: 6px radius, refined sizing) ---- */
.btn {
    font-family: 'Roboto', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 6px;
    padding: 0.5rem 1rem;
    transition: all 0.15s ease;
}

.btn-primary {
    background-color: var(--em-primary);
    border-color: var(--em-primary);
    color: var(--text-light);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--em-secondary);
    border-color: var(--em-secondary);
}

.btn-success {
    background-color: var(--em-success);
    border-color: var(--em-success);
}

.btn-warning {
    background-color: var(--em-warning);
    border-color: var(--em-warning);
    color: var(--text-dark);
}

.btn-outline-primary {
    color: var(--em-primary);
    border-color: var(--em-primary);
}

.btn-outline-primary:hover {
    background-color: var(--em-primary);
    color: var(--text-light);
}

.btn-outline-success {
    color: var(--em-success);
    border-color: var(--em-success);
}

.btn-outline-success:hover {
    background-color: var(--em-success);
    color: var(--text-light);
}

.btn-outline-warning {
    color: #92610a;
    border-color: var(--em-warning);
}

.btn-outline-warning:hover {
    background-color: var(--em-warning);
    color: var(--text-dark);
}

.btn-lg {
    padding: 0.625rem 1.5rem;
    font-size: 0.95rem;
}

/* ---- FORMS (Academy style: 6px radius, 40px height) ---- */
.form-control, .form-select {
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-dark);
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    height: 40px;
}

.form-control:focus, .form-select:focus {
    border-color: var(--em-primary);
    box-shadow: 0 0 0 2px rgba(18, 103, 227, 0.2);
}

.form-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.375rem;
}

textarea.form-control {
    height: auto;
}

/* ---- TABLES ---- */
.table {
    font-size: 0.875rem;
}

.table th {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.025rem;
    color: var(--text-muted);
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
}

.table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #f0f0f0;
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: #f9fafb;
}

/* ---- BADGES ---- */
.badge {
    font-size: 0.7rem;
    font-weight: 500;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
}

.bg-primary, .badge.bg-primary { background-color: var(--em-primary) !important; }
.bg-success, .badge.bg-success { background-color: var(--em-success) !important; }
.bg-info, .badge.bg-info { background-color: var(--em-accent) !important; }

.text-primary { color: var(--em-primary) !important; }
.text-success { color: var(--em-success) !important; }
.text-warning { color: #92610a !important; }
.text-info { color: var(--em-accent) !important; }

.badge-verified { background-color: var(--em-success); color: white; }
.badge-requires-changes { background-color: var(--em-warning); color: var(--text-dark); }
.badge-unverified { background-color: var(--text-muted); color: white; }

.badge-difficulty-easy { background-color: #d1fae5; color: #065f46; }
.badge-difficulty-moderate { background-color: #fef3c7; color: #92400e; }
.badge-difficulty-hard { background-color: #fed7aa; color: #9a3412; }
.badge-difficulty-expert { background-color: #fee2e2; color: #991b1b; }

/* ---- ALERTS ---- */
.alert {
    border-radius: var(--radius);
    font-size: 0.875rem;
    border: none;
}

.alert-info { background-color: #eff6ff; color: #1e40af; border-left: 4px solid var(--em-primary); }
.alert-success { background-color: #f0fdf4; color: #166534; border-left: 4px solid var(--em-success); }
.alert-warning { background-color: #fffbeb; color: #92400e; border-left: 4px solid var(--em-warning); }
.alert-danger { background-color: #fef2f2; color: #991b1b; border-left: 4px solid var(--em-error); }

/* ---- REVIEW PAGE SPLIT PANE ---- */
.review-container {
    display: flex;
    gap: 1.5rem;
    min-height: calc(100vh - 200px);
}

.review-left {
    flex: 0 0 45%;
    max-width: 45%;
    overflow-y: auto;
    max-height: calc(100vh - 200px);
    padding-right: 1rem;
}

.review-right {
    flex: 0 0 53%;
    max-width: 53%;
    max-height: calc(100vh - 200px);
}

.question-text {
    white-space: pre-line;
    font-size: 1rem;
    line-height: 1.7;
    padding: 1.25rem;
    background-color: #f9fafb;
    border-radius: var(--radius);
    border-left: 4px solid var(--em-primary);
}

.answer-option {
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-white);
    transition: background-color 0.15s;
    font-size: 0.9rem;
}

.answer-option.correct {
    background-color: #f0fdf4;
    border-color: var(--em-success);
    border-left: 4px solid var(--em-success);
}

.answer-option .option-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background-color: var(--bg-muted);
    font-weight: 600;
    font-size: 0.8rem;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.answer-option.correct .option-letter {
    background-color: var(--em-success);
    color: white;
}

.explanation-section {
    padding: 1rem 1.25rem;
    background-color: #eff6ff;
    border-radius: var(--radius);
    border-left: 4px solid var(--em-accent);
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.explanation-section h6 {
    color: var(--em-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
}

.clinical-pearl {
    background-color: #fffbeb;
    border-left: 4px solid var(--em-gold);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    font-size: 0.9rem;
}

.clinical-pearl h6 {
    color: #92400e;
    font-weight: 600;
    font-size: 0.85rem;
}

/* ---- REFERENCES ---- */
.reference-card {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    background: var(--bg-white);
    transition: box-shadow 0.15s, border-color 0.15s;
    cursor: pointer;
}

.reference-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--em-primary);
}

.reference-card .ref-title { font-weight: 500; color: var(--em-primary); font-size: 0.85rem; }
.reference-card .ref-url { font-size: 0.75rem; color: var(--text-muted); word-break: break-all; }

/* ---- ACTION BAR (fixed bottom) ---- */
.action-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    border-top: 1px solid var(--border-color);
    padding: 0.75rem 0;
    z-index: 1000;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
}

.action-bar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ---- REFERENCE MODAL (fullscreen, scrollable) ---- */
.modal-fullscreen-custom { max-width: 95vw; max-height: 95vh; margin: 2.5vh auto; }
.modal-fullscreen-custom .modal-content { height: 90vh; border-radius: var(--radius); }
.modal-fullscreen-custom .modal-body { overflow-y: auto; padding: 0; }
.modal-fullscreen-custom iframe { width: 100%; height: 100%; border: none; }

/* ---- FILTER MODAL (Academy quiz-builder style: gold/yellow header) ---- */
.modal-header.bg-gold {
    background-color: var(--em-gold) !important;
    color: var(--text-dark);
    border-bottom: none;
    padding: 1rem 1.5rem 0.75rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.modal-header.bg-gold .modal-title {
    font-weight: 700;
    font-size: 1.15rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.modal-header.bg-gold .btn-close {
    background-color: #4b5563;
    border-radius: 50%;
    width: 1.5rem;
    height: 1.5rem;
    opacity: 1;
    padding: 0;
    background-size: 0.6rem;
    filter: brightness(10);
}

.filter-section { margin-bottom: 1.25rem; }

.filter-section h6 {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.025rem;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #f0f0f0;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.375rem;
}

.checkbox-grid .form-check {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin: 0;
    transition: background-color 0.15s, border-color 0.15s;
    font-size: 0.85rem;
}

.checkbox-grid .form-check:hover {
    background-color: #f9fafb;
    border-color: var(--em-primary);
}

.checkbox-grid .form-check-input:checked + .form-check-label {
    font-weight: 500;
    color: var(--em-primary);
}

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

/* ---- INVITE LINK BOX ---- */
.invite-link-box {
    background-color: #f9fafb;
    border: 2px dashed var(--em-primary);
    border-radius: var(--radius);
    padding: 1rem;
    word-break: break-all;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.85rem;
    color: var(--em-primary);
}

/* ---- EARNINGS ---- */
.earnings-display {
    font-size: 2rem;
    font-weight: 700;
    color: var(--em-success);
}

/* ---- METADATA BADGES ---- */
.meta-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: 500;
    margin-right: 0.375rem;
    margin-bottom: 0.25rem;
}

/* ---- SELECT2 OVERRIDES ---- */
.select2-container--bootstrap-5 .select2-selection {
    background-color: #ffffff !important;
    border-color: var(--border-color) !important;
    color: var(--text-dark) !important;
    border-radius: 6px !important;
    font-size: 0.875rem !important;
}

.select2-container--bootstrap-5 .select2-selection--multiple { min-height: 80px !important; }

.select2-container--bootstrap-5 .select2-dropdown {
    background-color: #ffffff !important;
    border-color: var(--border-color) !important;
    border-radius: 6px !important;
}

.select2-container--bootstrap-5 .select2-results__option {
    color: var(--text-dark) !important;
    padding: 8px 12px !important;
    font-size: 0.85rem !important;
}

.select2-container--bootstrap-5 .select2-results__option--highlighted {
    background-color: var(--em-primary) !important;
    color: #ffffff !important;
}

.select2-container--bootstrap-5 .select2-selection--multiple .select2-selection__choice {
    background-color: var(--em-primary) !important;
    border-color: var(--em-primary) !important;
    color: #ffffff !important;
    border-radius: 9999px !important;
    padding: 2px 10px !important;
    font-size: 0.8rem !important;
}

.select2-container--bootstrap-5 .select2-selection--multiple .select2-selection__choice__remove { color: #ffffff !important; }
.select2-container--bootstrap-5 .select2-results__options { max-height: 300px !important; overflow-y: auto !important; }

/* ---- RESPONSIVE ---- */
@media (max-width: 991px) {
    .review-container { flex-direction: column; }
    .review-left, .review-right { flex: 0 0 100%; max-width: 100%; max-height: none; }
    .navbar { height: auto; padding: 0.5rem 0; }
}

@media (max-width: 767px) {
    .stat-card .stat-number { font-size: 1.8rem; }
    .checkbox-grid { grid-template-columns: 1fr; }
}