/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: #f5f7fa;
}

.hidden {
    display: none !important;
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* Login Screen */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #C41E3A 0%, #8B1428 100%);
}

.login-box {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-logo {
    display: block;
    max-width: 250px;
    height: auto;
    margin: 0 auto 1.5rem auto;
}

.login-box h1 {
    margin: 0 0 1.5rem 0;
    text-align: center;
    color: #333;
}

.form-group {
    margin-bottom: 1rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #555;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group textarea {
    resize: vertical;
}

.form-group input:focus {
    outline: none;
    border-color: #C41E3A;
}

.error {
    color: #e74c3c;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: #ffe5e5;
    border-radius: 5px;
    text-align: center;
}

.login-button {
    width: 100%;
    padding: 0.75rem;
    background: #C41E3A;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
}

.login-button:hover {
    background: #8B1428;
}

/* Header */
.header {
    background: linear-gradient(135deg, #89A3BE 0%, #7B95B1 100%);
    color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
    gap: 2rem;
}

.logo-section {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.header-logo {
    height: 50px;
    width: auto;
    display: block;
}

.logo-placeholder {
    font-weight: bold;
    color: #C41E3A;
    font-size: 1.2rem;
}

.class-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
    flex-shrink: 0;
}

.main-nav {
    display: flex;
    gap: 2rem;
    margin-left: auto;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    padding: 0.5rem 1rem;
    display: block;
    transition: background 0.3s;
    border-radius: 5px;
    cursor: pointer;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
}

.dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border-radius: 5px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 150px;
    z-index: 1000;
    overflow: hidden;
    margin-top: 0.25rem;
    padding-top: 0.25rem;
    animation: fadeIn 0.2s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-item:hover .dropdown,
.dropdown:hover {
    display: block;
}

.dropdown a {
    display: block;
    padding: 0.75rem 1rem;
    color: #333;
    text-decoration: none;
    transition: background 0.2s;
}

.dropdown a:hover {
    background: #f5f5f5;
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
}

.page {
    display: none;
    padding: 2rem;
}

.page.active {
    display: block;
}

.page > h2 {
    margin-bottom: 2rem;
}

/* My Students & Challenges Tab Content */
.my-students-tab-content,
.challenges-tab-content {
    display: none;
}

.my-students-tab-content.active,
.challenges-tab-content.active {
    display: block;
}

/* Dashboard */
.reports-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.report-box {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.report-box h3 {
    margin: 0 0 0.25rem 0;
    color: #C41E3A;
}

.report-subtitle {
    color: #888;
    font-size: 0.85rem;
    font-style: italic;
    margin: 0 0 1rem 0;
}

.report-box p {
    color: #666;
    font-style: italic;
}

/* Bar Chart */
.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 220px;
    padding-top: 25px;
    border-bottom: 2px solid #333;
}

.bar-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    justify-content: flex-end;
}

.bar-data-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 4px;
}

.bar-fill {
    width: 100%;
    background: linear-gradient(180deg, #C41E3A 0%, #a01830 100%);
    border-radius: 4px 4px 0 0;
    min-height: 0;
    transition: height 0.4s ease;
}

.bar-label {
    font-size: 0.7rem;
    color: #666;
    margin-top: 6px;
    text-align: center;
    font-weight: 500;
}

.bar-column {
    cursor: pointer;
}

.bar-column:hover .bar-fill {
    opacity: 0.8;
}

/* Chart Detail Modal */
.chart-detail-modal-content {
    max-width: 700px;
    max-height: 80vh;
    overflow-y: auto;
}

.chart-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.chart-detail-header h2 {
    margin: 0;
    color: #C41E3A;
    font-size: 1.25rem;
}

.chart-detail-close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
    padding: 0 0.25rem;
}

.chart-detail-close-btn:hover {
    color: #333;
}

.chart-detail-body table {
    width: 100%;
    border-collapse: collapse;
}

.chart-detail-body th {
    text-align: left;
    padding: 0.6rem 0.75rem;
    border-bottom: 2px solid #333;
    font-size: 0.85rem;
    color: #333;
}

.chart-detail-body td {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid #e0e0e0;
    font-size: 0.85rem;
    color: #555;
}

.chart-detail-body tr:last-child td {
    border-bottom: none;
}

.chart-detail-body .no-data-message {
    text-align: center;
    color: #888;
    padding: 2rem;
    font-style: italic;
}

/* Reading Page */
.button-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.month-selector {
    padding: 0.75rem 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    color: #333;
}

.month-selector:focus {
    outline: none;
    border-color: #89A3BE;
}

.log-reading-btn {
    background: #28a745;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.log-reading-btn:hover {
    background: #218838;
}

.review-btn {
    background: #ffc107;
    color: #333;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.review-btn:hover {
    background: #e0a800;
}

.leaderboard {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.leaderboard h2 {
    margin: 0 0 1.5rem 0;
    color: #333;
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 5px;
    gap: 1rem;
    transition: background 0.2s;
}

.leaderboard-item:hover {
    background: #e9ecef;
}

.medal {
    font-size: 1.5rem;
}

.rank {
    font-weight: 600;
    color: #666;
    min-width: 40px;
}

.student-name {
    flex: 1;
    font-weight: 500;
    color: #333;
}

.minutes {
    font-weight: 600;
    color: #C41E3A;
}

/* My Class Page */
.students-table {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: #C41E3A;
    color: white;
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

tbody tr {
    border-bottom: 1px solid #e0e0e0;
    transition: background 0.2s;
}

tbody tr:hover {
    background: #f8f9fa;
}

tbody tr:last-child {
    border-bottom: none;
}

td {
    padding: 1rem;
    color: #333;
}

.edit-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: transform 0.2s;
}

.edit-btn:hover {
    transform: scale(1.2);
}

/* Placeholder Pages */
.placeholder-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.mvp2-text {
    color: red;
    font-size: 4rem;
    font-weight: bold;
    text-align: center;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.modal-content h2 {
    margin: 0 0 1.5rem 0;
    color: #333;
}

.checkbox-header {
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e0e0e0;
}

.students-checkbox-list {
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 0.5rem;
}

.students-checkbox-list label {
    display: block;
    padding: 0.5rem;
    cursor: pointer;
    transition: background 0.2s;
}

.students-checkbox-list label:hover {
    background: #f5f5f5;
}

.students-checkbox-list input[type="checkbox"] {
    margin-right: 0.5rem;
}

.checkbox-header input[type="checkbox"] {
    margin-right: 0.5rem;
}

.radio-group {
    display: flex;
    gap: 1.5rem;
}

.radio-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: normal;
}

.radio-group input[type="radio"] {
    margin-right: 0.5rem;
}

.book-search-results,
.book-results {
    position: absolute;
    background: white;
    border: 1px solid #ddd;
    border-top: none;
    border-radius: 0 0 5px 5px;
    max-height: 600px;
    overflow-y: auto;
    z-index: 1001;
    width: 100%;
    left: 0;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-top: 5px;
}

.book-result-item {
    padding: 0.75rem;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid #e0e0e0;
}

.book-result-item:last-child {
    border-bottom: none;
}

.book-result-item:hover {
    background: #f5f5f5;
}

.book-thumbnail {
    width: 50px;
    height: 75px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

.book-thumbnail-placeholder {
    width: 50px;
    height: 75px;
    background: linear-gradient(135deg, #C41E3A 0%, #8B1428 100%);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.book-info {
    flex: 1;
    min-width: 0;
}

.book-info strong {
    display: block;
    color: #333;
    margin-bottom: 0.25rem;
}

.book-info small {
    color: #666;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

.cancel-btn {
    padding: 0.75rem 1.5rem;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
}

.cancel-btn:hover {
    background: #5a6268;
}

.submit-btn {
    padding: 0.75rem 1.5rem;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: #218838;
}

/* Student App Styles */
.student-header {
    background: linear-gradient(135deg, #89A3BE 0%, #7B95B1 100%);
    color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.student-header-logo {
    height: 50px;
    width: auto;
    flex-shrink: 0;
}

.student-name-display {
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    flex-shrink: 0;
}

.student-header .header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    gap: 2rem;
}

.student-header h1 {
    margin: 0;
    font-size: 1.8rem;
}

.logout-btn {
    padding: 0.5rem 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.logout-btn:hover {
    background: white;
    color: #C41E3A;
}

.student-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.student-welcome {
    margin-bottom: 2rem;
}

.student-welcome h2 {
    color: #333;
    font-size: 2rem;
}

.student-welcome span {
    color: #C41E3A;
}

.student-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: white;
    border-radius: 10px;
    border: 2px solid black;
    padding: 2rem 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    aspect-ratio: 1 / 0.75;
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.stat-icon {
    font-size: 3.5rem;
}

.stat-content {
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: #333;
}

.stat-label {
    color: #666;
    font-size: 0.95rem;
    margin-top: 0.5rem;
    line-height: 1.3;
}

/* Road Progress Bar Styles */
.class-progress-container,
.student-progress-container {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.class-progress-container h3,
.student-progress-container h3 {
    margin: 0 0 1.5rem 0;
    color: #2c3e50;
    font-size: 1.5rem;
}

.road-progress-wrapper {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.road-progress-bar {
    flex: 1;
    height: 60px;
    background: linear-gradient(180deg, #4a4a4a 0%, #2a2a2a 50%, #4a4a4a 100%);
    border-radius: 8px;
    position: relative;
    overflow: visible;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.road-stripes {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background-image: repeating-linear-gradient(
        90deg,
        white 0px,
        white 30px,
        transparent 30px,
        transparent 60px
    );
    transform: translateY(-50%);
}

.vehicle-marker {
    position: absolute;
    top: -5%;
    transform: translate(-50%, -50%);
    font-size: 3.5rem;
    transition: left 0.5s ease;
    z-index: 10;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
    will-change: left, filter;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.vehicle-car {
    transform: translate(-50%, -50%) scaleX(-1);
    filter:
        drop-shadow(0 0 2px white)
        drop-shadow(0 0 4px white)
        drop-shadow(0 0 6px white)
        drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.vehicle-bike {
    transform: translate(-50%, -50%) scaleX(-1);
    filter:
        drop-shadow(0 0 2px white)
        drop-shadow(0 0 4px white)
        drop-shadow(0 0 6px white)
        drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.progress-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    min-width: 180px;
}

.progress-minutes {
    font-size: 1.1rem;
    font-weight: 700;
    color: #2c3e50;
    white-space: nowrap;
}

.edit-goal-btn {
    padding: 0.5rem 1rem;
    background: #C41E3A;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
}

.edit-goal-btn:hover {
    background: #8B1428;
}

.student-section {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.student-section h3 {
    color: #333;
    margin-top: 0;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.student-table {
    width: 100%;
    border-collapse: collapse;
}

.student-table thead {
    background: linear-gradient(135deg, #C41E3A 0%, #8B1428 100%);
    color: white;
}

.student-table th,
.student-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

.student-table tbody tr:hover {
    background: #f8f9fa;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.25rem;
    margin-top: 1rem;
}

.pagination-btn {
    padding: 0.4rem 0.75rem;
    border: 1px solid #ddd;
    background: white;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85rem;
    color: #555;
    transition: all 0.2s;
}

.pagination-btn:hover:not(:disabled):not(.active) {
    background: #f0f0f0;
    border-color: #C41E3A;
    color: #C41E3A;
}

.pagination-btn.active {
    background: #C41E3A;
    color: white;
    border-color: #C41E3A;
    font-weight: 600;
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Student Navigation */
.student-nav {
    display: flex;
    gap: 2rem;
    margin-left: auto;
}

.student-nav-link {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    text-decoration: none;
    padding: 0.5rem 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.3s;
    position: relative;
    border-radius: 5px;
}

.student-nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
}

.streak-badge {
    background: white;
    color: #C41E3A;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 2px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.student-points-badge {
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 0.95rem;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    white-space: nowrap;
    flex-shrink: 0;
}

.student-points-badge::before {
    content: '⭐';
    font-size: 1rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.student-welcome-inline {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
}

/* Student Pages */
.student-page {
    display: none;
}

.student-page.active {
    display: block;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h2 {
    color: #333;
    margin: 0;
}

.log-reading-btn {
    padding: 0.75rem 1.5rem;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: background 0.3s;
}

.log-reading-btn:hover {
    background: #218838;
}

/* MVP2 Placeholder */
.mvp2-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    font-size: 5rem;
    font-weight: bold;
    color: #dc3545;
}

/* Checkbox Label */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 600;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Books Page Styles */
.books-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid #e0e0e0;
}

.books-tab {
    padding: 1rem 2rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1rem;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
}

.books-tab:hover {
    color: #2c3e50;
    border-bottom-color: #C41E3A;
}

.books-tab.active {
    color: #2c3e50;
    border-bottom-color: #2c3e50;
}

.books-tab-content {
    display: none;
}

.books-tab-content.active {
    display: block;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2rem;
    padding: 1rem;
}

.book-card {
    background: white;
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.book-cover {
    width: 100%;
    height: 250px;
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.book-cover-placeholder {
    font-size: 4rem;
}

.book-details {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-title {
    font-size: 1rem;
    font-weight: 600;
    color: #2c3e50;
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    font-size: 0.875rem;
    color: #666;
    margin: 0 0 0.5rem 0;
}

.book-date-finished {
    font-size: 0.8rem;
    color: #888;
    margin: 0 0 0.75rem 0;
}

/* Star Ratings */
.star-rating {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-top: 0.5rem;
}

.star-rating .star {
    font-size: 1.4rem;
    cursor: pointer;
    transition: color 0.15s, transform 0.15s;
    line-height: 1;
    -webkit-text-stroke: 0.5px #b8860b;
}

.star-rating .star:hover {
    transform: scale(1.2);
}

.star-rating .star.full {
    color: #f5c518;
}

.star-rating .star.half {
    color: #f5c518;
    background: linear-gradient(90deg, #f5c518 50%, #ddd 50%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 0;
}

.star-rating .star.empty {
    color: #ddd;
}

.rating-text {
    font-size: 0.75rem;
    color: #666;
    margin-left: 6px;
    font-weight: 600;
}

.rating-prompt {
    color: #aaa;
    font-weight: 400;
    font-style: italic;
}

.book-status-section {
    margin-top: auto;
}

.book-status-section label {
    font-size: 0.875rem;
    font-weight: 600;
    color: #555;
    display: block;
    margin-bottom: 0.5rem;
}

.book-status-dropdown {
    width: 100%;
    padding: 0.5rem;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 0.875rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.book-status-dropdown:hover {
    border-color: #C41E3A;
}

.book-status-dropdown:focus {
    outline: none;
    border-color: #2c3e50;
}

.book-status-badge {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    text-align: center;
    margin-top: auto;
}

.book-status-badge.finished {
    background: #27ae60;
    color: white;
}

.no-books-message {
    grid-column: 1 / -1;
    text-align: center;
    color: #999;
    font-size: 1.1rem;
    padding: 3rem;
}

/* Wishlist Search Section */
.wishlist-search-section {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.wishlist-search-section h3 {
    margin: 0 0 1rem 0;
    color: #2c3e50;
}

.search-box {
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: #C41E3A;
}

.wishlist-search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 2px solid #e0e0e0;
    border-top: none;
    border-radius: 0 0 8px 8px;
    max-height: 400px;
    overflow-y: auto;
    z-index: 10;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.wishlist-result-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.2s ease;
}

.wishlist-result-item:hover {
    background: #f8f9fa;
}

.wishlist-result-item:last-child {
    border-bottom: none;
}

.result-thumbnail {
    width: 50px;
    height: 70px;
    object-fit: cover;
    border-radius: 4px;
}

.result-thumbnail-placeholder {
    width: 50px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f5f5;
    border-radius: 4px;
    font-size: 1.5rem;
}

.result-info {
    flex: 1;
}

.result-info strong {
    color: #2c3e50;
    font-size: 0.95rem;
}

.result-info small {
    color: #666;
    font-size: 0.85rem;
}

.add-wishlist-btn {
    padding: 0.5rem 1rem;
    background: #C41E3A;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s ease;
}

.add-wishlist-btn:hover {
    background: #8B1428;
}

.remove-wishlist-btn {
    width: 100%;
    padding: 0.5rem;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    margin-top: auto;
    transition: background 0.3s ease;
}

.remove-wishlist-btn:hover {
    background: #c0392b;
}

.no-results {
    padding: 1rem;
    text-align: center;
    color: #999;
}

/* Book Suggestions Styles */
.book-suggestions-section {
    margin-bottom: 0.5rem;
}

.suggestions-header {
    padding: 0.75rem 1rem;
    background: #f0f0f0;
    font-weight: 600;
    font-size: 0.875rem;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.book-suggestion-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid #f0f0f0;
    cursor: pointer;
    transition: background 0.2s ease;
}

.book-suggestion-item:hover {
    background: #f8f9fa;
}

.suggestion-thumbnail {
    width: 40px;
    height: 55px;
    object-fit: cover;
    border-radius: 4px;
}

.suggestion-thumbnail-placeholder {
    width: 40px;
    height: 55px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f5f5;
    border-radius: 4px;
    font-size: 1.25rem;
}

.suggestion-info {
    flex: 1;
}

.suggestion-info strong {
    color: #2c3e50;
    font-size: 0.9rem;
    display: block;
    margin-bottom: 0.25rem;
}

.suggestion-info small {
    color: #666;
    font-size: 0.8rem;
}

.book-suggestions-empty {
    padding: 1rem;
    text-align: center;
    color: #999;
    font-style: italic;
}

/* Milestones Page Styles */
.milestones-header {
    margin-bottom: 2rem;
    text-align: center;
}

.milestones-header h2 {
    margin: 0 0 0.5rem 0;
    color: #2c3e50;
    font-size: 2rem;
}

.milestones-subtitle {
    color: #666;
    font-size: 1.1rem;
    margin: 0 0 1.5rem 0;
}

.milestone-tiers {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.tier-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    border-radius: 12px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    width: 100px;
    height: 100px;
    box-sizing: border-box;
}

.tier-badge:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.tier-badge-rainbow {
    background: linear-gradient(
        135deg,
        #ff0000 0%,
        #ff7f00 16.67%,
        #ffff00 33.33%,
        #00ff00 50%,
        #0000ff 66.67%,
        #8b00ff 83.33%,
        #ff00ff 100%
    );
    animation: rainbow-rotate 3s linear infinite;
}

.tier-icon {
    font-size: 1.75rem;
}

.tier-name {
    color: white;
    font-weight: 700;
    font-size: 0.875rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.milestones-list {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

.milestone-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.milestone-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.milestone-badge {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    border: 3px solid white;
}

.milestone-icon {
    font-size: 2.5rem;
}

/* Rainbow gradient for Mythic tier */
.rainbow-badge {
    background: linear-gradient(
        135deg,
        #ff0000 0%,
        #ff7f00 16.67%,
        #ffff00 33.33%,
        #00ff00 50%,
        #0000ff 66.67%,
        #8b00ff 83.33%,
        #ff00ff 100%
    );
    animation: rainbow-rotate 3s linear infinite;
}

@keyframes rainbow-rotate {
    0% {
        filter: hue-rotate(0deg);
    }
    100% {
        filter: hue-rotate(360deg);
    }
}

.milestone-content {
    flex: 1;
    min-width: 0;
}

.milestone-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.milestone-name {
    margin: 0;
    color: #2c3e50;
    font-size: 1.25rem;
    font-weight: 600;
}

.milestone-tier {
    padding: 0.25rem 0.75rem;
    background: #f0f0f0;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
    color: #666;
}

.milestone-progress-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.progress-bar-container {
    flex: 1;
    height: 24px;
    background: #e0e0e0;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #C41E3A 0%, #2ecc71 100%);
    border-radius: 12px;
    transition: width 0.5s ease;
    position: relative;
    overflow: hidden;
}

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

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

.progress-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: #555;
    white-space: nowrap;
    min-width: 120px;
    text-align: right;
}

/* Responsive design for milestones */
@media (max-width: 600px) {
    .milestone-item {
        flex-direction: column;
        text-align: center;
    }

    .milestone-badge {
        width: 100px;
        height: 100px;
    }

    .milestone-icon {
        font-size: 3rem;
    }

    .milestone-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .milestone-progress-section {
        flex-direction: column;
        width: 100%;
    }

    .progress-bar-container {
        width: 100%;
    }

    .progress-text {
        text-align: center;
        min-width: auto;
    }
}

/* Badges & Challenges Styles */
.badges-header {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-bottom: 1rem;
}

.create-challenge-btn {
    padding: 0.75rem 1.5rem;
    background: #C41E3A;
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
}

.create-challenge-btn:hover {
    background: #8B1428;
}

.teacher-challenges-list {
    display: grid;
    gap: 1rem;
}

.teacher-challenge-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.challenge-icon-small {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
}

.challenge-details {
    flex: 1;
}

.challenge-details h3 {
    margin: 0 0 0.25rem 0;
    font-size: 1.1rem;
}

.challenge-details p {
    margin: 0;
    color: #666;
    font-size: 0.9rem;
}

.challenge-goal {
    font-weight: 600;
    color: #C41E3A;
}

.challenge-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-shrink: 0;
}

.edit-challenge-btn {
    padding: 0.5rem 0.75rem;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.2rem;
}

.edit-challenge-btn:hover {
    background: #2980b9;
}

.delete-challenge-btn {
    padding: 0.5rem 0.75rem;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.2rem;
}

.delete-challenge-btn:hover {
    background: #c0392b;
}

/* Tier Tags */
.challenge-tiers {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.tier-tag {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    background: #f0f0f0;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #555;
}

/* Icon Preview */
.icon-preview {
    margin-top: 1rem;
}

.icon-preview img {
    max-width: 150px;
    max-height: 150px;
    border-radius: 8px;
}

.form-hint {
    display: block;
    margin-top: 0.25rem;
    margin-bottom: 0.5rem;
    color: #666;
    font-size: 0.875rem;
}

/* Tier Builder */
.tiers-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.tier-row {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem;
    background: #f9f9f9;
    border-radius: 8px;
    border: 1px solid #eee;
}

.tier-row-fields {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.tier-row-fields input[type="text"] {
    flex: 2;
    padding: 0.5rem 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.9rem;
}

.tier-row-fields input[type="number"] {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.9rem;
}

.tier-row-fields input:focus {
    outline: none;
    border-color: #C41E3A;
}

.tier-icon-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tier-icon-label {
    font-size: 0.8rem;
    color: #666;
    white-space: nowrap;
}

.tier-icon-input {
    font-size: 0.8rem;
}

.tier-icon-preview {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid #ddd;
}

.remove-tier-btn {
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    font-size: 1.1rem;
    line-height: 1;
    padding: 0 0 2px 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.remove-tier-btn:hover {
    background: #c0392b;
}

.add-tier-btn {
    background: none;
    border: 2px dashed #C41E3A;
    color: #C41E3A;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.add-tier-btn:hover {
    background: #C41E3A;
    color: white;
}

/* Student Badges Tabs */
.badges-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid #e0e0e0;
}

.badges-tab {
    padding: 1rem 2rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1rem;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
}

.badges-tab:hover {
    color: #2c3e50;
    border-bottom-color: #C41E3A;
}

.badges-tab.active {
    color: #2c3e50;
    border-bottom-color: #2c3e50;
}

.badges-tab-content {
    display: none;
}

.badges-tab-content.active {
    display: block;
}

/* Earned Badges Grid */
.earned-badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    padding: 1rem;
}

.earned-badge-card {
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 3px solid #000000;
}

.earned-badge-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.badge-icon {
    width: 100px;
    height: 100px;
    object-fit: contain;
    border-radius: 50%;
    margin-bottom: 1rem;
    border: 2px solid #000000;
    background-color: #ffffff;
    padding: 4px;
    box-sizing: border-box;
}

.badge-info-box {
    background-color: #ffffff;
    border: 1px solid #000000;
    border-radius: 6px;
    padding: 0.75rem;
    margin-top: 0.75rem;
}

.earned-badge-card h4 {
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
    color: #2c3e50;
}

.badge-tier {
    color: #2c3e50;
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0.5rem 0;
}

.badge-month {
    color: #666;
    font-size: 0.9rem;
    margin: 0;
}

.no-badges-message, .no-challenges-message {
    text-align: center;
    color: #999;
    padding: 2rem;
    font-size: 1.1rem;
}

/* Challenges Section */
.challenges-section {
    margin-bottom: 3rem;
}

.challenges-section h3 {
    margin: 0 0 1rem 0;
    color: #2c3e50;
    font-size: 1.5rem;
}

.challenges-list {
    display: grid;
    gap: 1rem;
}

.challenge-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.challenge-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.challenge-card.completed {
    border: 3px solid #27ae60;
}

.challenge-icon {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 12px;
    flex-shrink: 0;
}

.challenge-info {
    flex: 1;
}

.challenge-info h4 {
    margin: 0 0 0.25rem 0;
    font-size: 1.2rem;
    color: #2c3e50;
}

.challenge-period {
    color: #666;
    font-size: 0.9rem;
    margin: 0 0 0.5rem 0;
}

.challenge-description {
    color: #555;
    font-size: 0.85rem;
    font-style: italic;
    margin: 0 0 1rem 0;
    line-height: 1.4;
}

.completed-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: #27ae60;
    color: white;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.challenge-progress {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.challenge-progress-bar {
    flex: 1;
    height: 20px;
    background: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
}

.challenge-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #C41E3A 0%, #2ecc71 100%);
    border-radius: 10px;
    transition: width 0.5s ease;
}

.challenge-progress-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: #555;
    white-space: nowrap;
    min-width: 100px;
}

/* Tier Progress Display */
.challenge-tiers-progress {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 0.5rem;
}

.tier-progress-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tier-progress-row.tier-reached .tier-label {
    color: #27ae60;
    font-weight: 700;
}

.tier-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: #555;
    min-width: 60px;
}

.tier-progress-bar-container {
    flex: 1;
    height: 12px;
    background: #e0e0e0;
    border-radius: 6px;
    overflow: hidden;
}

.tier-progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #C41E3A 0%, #2ecc71 100%);
    border-radius: 6px;
    transition: width 0.5s ease;
}

.tier-goal-text {
    font-size: 0.75rem;
    color: #777;
    min-width: 65px;
    text-align: right;
}

.tier-points-text {
    font-size: 0.75rem;
    font-weight: 600;
    color: #C41E3A;
    min-width: 55px;
    text-align: right;
}

.tier-progress-row.tier-reached .tier-points-text {
    color: #27ae60;
}

.challenge-points-summary {
    font-size: 0.85rem;
    font-weight: 600;
    color: #C41E3A;
    margin: 0.25rem 0;
}

.challenge-raw-progress {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: #888;
    text-align: right;
}

/* Celebration Modal */
.celebration-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: celebrationFadeIn 0.3s ease;
}

.celebration-overlay.hidden {
    display: none;
}

@keyframes celebrationFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.celebration-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.celebration-message {
    text-align: center;
    z-index: 10;
    animation: celebrationBounceIn 0.5s ease 0.2s both;
}

@keyframes celebrationBounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.08); }
    70% { transform: scale(0.95); }
    100% { transform: scale(1); opacity: 1; }
}

.celebration-message h2 {
    font-size: 2.2rem;
    color: #fff;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.celebration-continue-btn {
    background: #3498db;
    color: #fff;
    border: none;
    padding: 12px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.celebration-continue-btn:hover {
    background: #2980b9;
    transform: scale(1.05);
}

.celebration-continue-btn:active {
    transform: scale(0.97);
}

/* Balloons */
.balloons-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.balloon {
    position: absolute;
    bottom: -120px;
    width: 50px;
    height: 65px;
    border-radius: 50% 50% 50% 50% / 40% 40% 60% 60%;
    opacity: 0.9;
    animation: balloonFloat linear forwards;
}

.balloon::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 30px;
    background: rgba(255, 255, 255, 0.5);
}

@keyframes balloonFloat {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.9;
    }
    20% {
        opacity: 0.9;
    }
    80% {
        opacity: 0.8;
    }
    100% {
        transform: translateY(-120vh) rotate(15deg);
        opacity: 0;
    }
}

/* Fireworks */
.fireworks-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.firework-burst {
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    animation: fireworkParticle ease-out forwards;
}

@keyframes fireworkParticle {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(var(--tx), var(--ty)) scale(0);
        opacity: 0;
    }
}

/* Log Mode Toggle */
.log-mode-toggle {
    display: flex;
    gap: 0;
    margin-bottom: 1.25rem;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid #3498db;
}

.log-mode-btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: #fff;
    color: #3498db;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.log-mode-btn.active {
    background: #3498db;
    color: #fff;
}

.log-mode-btn:hover:not(.active) {
    background: #ebf5fb;
}

/* Timer */
.timer-display {
    text-align: center;
    padding: 1.5rem 0 1rem;
}

#timer-display-text {
    font-size: 3.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: #2c3e50;
    letter-spacing: 2px;
}

.timer-controls {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.timer-btn {
    padding: 10px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.timer-btn:active {
    transform: scale(0.96);
}

.timer-start {
    background: #27ae60;
    color: #fff;
}

.timer-start:hover {
    background: #219a52;
}

.timer-pause {
    background: #f39c12;
    color: #fff;
}

.timer-pause:hover {
    background: #e08e0b;
}

.timer-resume {
    background: #27ae60;
    color: #fff;
}

.timer-resume:hover {
    background: #219a52;
}

.timer-end {
    background: #C41E3A;
    color: #fff;
}

.timer-end:hover {
    background: #a8182f;
}

.timer-result {
    text-align: center;
    font-size: 1.05rem;
    font-weight: 600;
    color: #27ae60;
    margin-bottom: 0.5rem;
}

/* Free Reading Assignment Modal */
#edit-free-reading-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

#edit-free-reading-modal.active {
    display: flex;
}

#edit-free-reading-modal .modal-content {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
    max-height: 600px;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    position: relative;
}

#edit-free-reading-modal .close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
}

#edit-free-reading-modal .close:hover {
    color: #333;
}

.free-reading-book-option {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    background: #f9f9f9;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    font-size: 0.95rem;
}

.free-reading-book-option:hover {
    background: #e8f4f8;
    border-color: #3498db;
}

/* Teacher Books Page */
.teacher-book-title-cell {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.teacher-book-cover {
    width: 40px;
    height: 60px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

.no-books-message {
    text-align: center;
    color: #666;
    padding: 2rem;
    font-size: 1.1rem;
}

/* Class Books Divider in Search Results */
.class-books-divider {
    padding: 0.5rem 0.75rem;
    background: #f0f0f0;
    font-size: 0.75rem;
    font-weight: 600;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #e0e0e0;
}

.class-book-item {
    background: #fef9f0;
}

/* Teacher Books Page Tabs */
.teacher-books-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid #e0e0e0;
}

.teacher-books-tab,
.my-students-tab,
.challenges-tab {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    transition: all 0.2s;
}

.teacher-books-tab:hover,
.my-students-tab:hover,
.challenges-tab:hover {
    color: #C41E3A;
}

.teacher-books-tab.active,
.my-students-tab.active,
.challenges-tab.active {
    color: #C41E3A;
    border-bottom-color: #C41E3A;
    font-weight: 600;
}

.teacher-books-tab-content {
    display: none;
}

.teacher-books-tab-content.active {
    display: block;
}

/* Clickable Count Links */
.book-count-link {
    color: #C41E3A;
    cursor: pointer;
    text-decoration: underline;
    font-weight: 600;
}

.book-count-link:hover {
    color: #8B1428;
}

/* Book Students Modal */
.book-student-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.book-student-item:last-child {
    border-bottom: none;
}

.book-student-rating {
    color: #C41E3A;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Teacher Favorites */
.favorites-search-section {
    position: relative;
    margin-bottom: 1.5rem;
}

.favorites-search-section .form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
}

.favorites-search-section .book-search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 10;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 0 0 8px 8px;
    max-height: 300px;
    overflow-y: auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.teacher-favorites-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.teacher-favorite-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.teacher-favorite-info {
    flex: 1;
    min-width: 0;
}

.teacher-favorite-info strong {
    display: block;
    margin-bottom: 0.25rem;
}

.teacher-favorite-info small {
    color: #666;
}

.teacher-favorite-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

/* Recommend Book Preview */
.recommend-book-preview {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f9f9f9;
    border-radius: 8px;
    margin-bottom: 1rem;
}

/* Recommended Badge on Wishlist */
.book-cover {
    position: relative;
}

.recommended-badge {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    background: #C41E3A;
    color: white;
    font-size: 0.65rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    white-space: nowrap;
    z-index: 1;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}