/* Room Quiz Styles - Tính năng Tạo Phòng Thi */

/* Room Creation Section */
.room-creation-section {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.room-creation-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.room-creation-header i {
    font-size: 32px;
    color: var(--primary-color);
}

.room-creation-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.room-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.room-form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.room-form-group label {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.room-form-group label i {
    color: var(--primary-color);
}

.room-form-group input,
.room-form-group select,
.room-form-group textarea {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.room-form-group input:focus,
.room-form-group select:focus,
.room-form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.room-form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.room-code-generator {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.room-code-generator input {
    flex: 1;
}

.btn-generate-code {
    padding: 12px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-generate-code:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.room-code-note {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 5px;
}

.room-quiz-selector {
    grid-column: 1 / -1;
}

.room-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

.btn-create-room {
    padding: 14px 32px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-create-room:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-create-room:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Room List Section */
.my-rooms-section {
    margin-top: 40px;
}

.my-rooms-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.my-rooms-header h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.rooms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.room-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.room-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.room-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.room-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px 0;
}

.room-code-badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1px;
}

.room-card-description {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 15px;
    line-height: 1.5;
}

.room-card-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.room-meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.room-meta-item i {
    color: var(--primary-color);
    width: 16px;
}

.room-card-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 15px;
}

.room-stat-item {
    text-align: center;
    padding: 10px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.room-stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.room-stat-label {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
    display: block;
}

.room-card-actions {
    display: flex;
    gap: 8px;
}

.btn-view-room,
.btn-share-room,
.btn-delete-room {
    flex: 1;
    padding: 10px;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn-view-room {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-view-room:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-share-room {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.btn-share-room:hover {
    background: var(--primary-color);
    color: white;
}

.btn-delete-room {
    background: #fee;
    color: #e53e3e;
}

.btn-delete-room:hover {
    background: #e53e3e;
    color: white;
}

/* Room Join Section */
.room-join-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 30px;
    color: white;
    text-align: center;
}

.room-join-header {
    margin-bottom: 30px;
}

.room-join-header h2 {
    font-size: 32px;
    font-weight: 800;
    margin: 0 0 10px 0;
}

.room-join-header p {
    font-size: 16px;
    opacity: 0.9;
}

.room-join-form {
    max-width: 500px;
    margin: 0 auto;
}

.room-join-input-group {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.room-join-input-group input {
    flex: 1;
    padding: 16px 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    text-align: center;
    letter-spacing: 3px;
    background: rgba(255, 255, 255, 0.95);
    color: #333;
}

.room-join-input-group input::placeholder {
    letter-spacing: normal;
    font-weight: 500;
}

.room-join-input-group input:focus {
    outline: none;
    border-color: white;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.2);
}

.btn-join-room {
    padding: 16px 40px;
    background: white;
    color: #667eea;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn-join-room:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-join-room:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Room Details Modal */
.room-details-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.room-details-modal.active {
    display: flex;
}

.room-details-content {
    background: var(--card-bg);
    border-radius: 20px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.room-details-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 20px 20px 0 0;
    position: relative;
}

.room-details-title-section h2 {
    font-size: 28px;
    font-weight: 800;
    margin: 0 0 10px 0;
}

.room-details-code {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.room-details-description {
    font-size: 15px;
    opacity: 0.95;
    line-height: 1.6;
}

.btn-close-room-modal {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-close-room-modal:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

.room-details-body {
    padding: 30px;
}

.room-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.room-info-item {
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.room-info-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.room-info-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

/* Leaderboard Section */
.room-leaderboard-section {
    margin-top: 30px;
}

.leaderboard-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.leaderboard-header h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.leaderboard-header i {
    font-size: 24px;
    color: #f59e0b;
}

.leaderboard-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 8px;
}

.leaderboard-table thead th {
    text-align: left;
    padding: 12px 15px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.leaderboard-table tbody tr {
    background: var(--bg-secondary);
    transition: all 0.3s ease;
}

.leaderboard-table tbody tr:hover {
    background: var(--bg-primary);
    transform: translateX(5px);
}

.leaderboard-table tbody td {
    padding: 15px;
}

.leaderboard-table tbody tr td:first-child {
    border-radius: 8px 0 0 8px;
}

.leaderboard-table tbody tr td:last-child {
    border-radius: 0 8px 8px 0;
}

.leaderboard-rank {
    font-size: 18px;
    font-weight: 700;
    width: 50px;
    text-align: center;
}

.leaderboard-rank.rank-1 {
    color: #f59e0b;
}

.leaderboard-rank.rank-2 {
    color: #94a3b8;
}

.leaderboard-rank.rank-3 {
    color: #cd7f32;
}

.leaderboard-player {
    display: flex;
    align-items: center;
    gap: 12px;
}

.leaderboard-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 16px;
}

.leaderboard-name {
    font-weight: 600;
    color: var(--text-primary);
}

.leaderboard-score {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.leaderboard-time {
    font-size: 14px;
    color: var(--text-secondary);
}

.leaderboard-empty {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.leaderboard-empty i {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.5;
}

/* User Name Input Modal */
.user-name-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 10001;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.user-name-modal.active {
    display: flex;
}

.user-name-content {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 40px;
    max-width: 500px;
    width: 100%;
    text-align: center;
}

.user-name-content h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 10px 0;
}

.user-name-content p {
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.user-name-input {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 16px;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 600;
}

.user-name-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.btn-submit-name {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit-name:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* Responsive Design */
@media (max-width: 768px) {
    .room-form-grid {
        grid-template-columns: 1fr;
    }

    .room-code-generator {
        flex-direction: column;
        align-items: stretch;
    }

    .rooms-grid {
        grid-template-columns: 1fr;
    }

    .room-info-grid {
        grid-template-columns: 1fr;
    }

    .room-card-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .room-join-section {
        padding: 30px 20px;
    }

    .room-join-header h2 {
        font-size: 24px;
    }

    .room-join-input-group {
        flex-direction: column;
    }

    .leaderboard-table {
        font-size: 14px;
    }

    .leaderboard-table thead {
        display: none;
    }

    .leaderboard-table tbody tr {
        display: flex;
        flex-direction: column;
        gap: 10px;
        padding: 15px;
        margin-bottom: 10px;
    }

    .leaderboard-table tbody td {
        padding: 5px 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .leaderboard-table tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-secondary);
    }
}

/* Empty State */
.rooms-empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.rooms-empty-state i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.rooms-empty-state h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.rooms-empty-state p {
    font-size: 15px;
    margin-bottom: 25px;
}

/* Loading State */
.room-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    gap: 20px;
}

.room-loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.room-loading-text {
    color: var(--text-secondary);
    font-size: 16px;
}