/* Study Groups Premium Styles - ABA Mastery
   A product of Bradley Virtual Solutions, LLC */

/* ============================================
   MODAL STYLES
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: 20px;
    animation: fadeIn 0.3s;
}

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

.modal-content {
    background: var(--bg-primary, #ffffff);
    border-radius: 12px;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    position: relative;
}

.study-group-modal .modal-content {
    max-width: 600px;
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color, #e5e7eb);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 24px;
    color: var(--text-primary, #0f172a);
}

.close-btn {
    background: none;
    border: none;
    font-size: 32px;
    cursor: pointer;
    color: var(--text-secondary, #64748b);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s;
}

.close-btn:hover {
    background: var(--bg-secondary, #f1f5f9);
    color: var(--text-primary, #0f172a);
}

.modal-body {
    padding: 24px;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    display: block !important;
    visibility: visible !important;
}

.modal-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--border-color, #e5e7eb);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.study-group-modal .form-group {
    margin-bottom: 20px;
}

.study-group-modal .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.study-group-modal .form-group input,
.study-group-modal .form-group select,
.study-group-modal .form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
}

.study-group-modal .form-group textarea {
    resize: vertical;
}

.study-group-modal .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.study-group-modal .checkbox-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.study-group-modal .checkbox-list label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.study-group-modal .checkbox-list input[type="checkbox"] {
    width: auto;
}

.study-group-modal .checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.study-group-modal .checkbox-group input[type="checkbox"] {
    width: auto;
}

/* Invite Code Modal */
.invite-code-display {
    margin: 30px 0;
}

.invite-code {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 8px;
    color: var(--primary);
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 15px;
}

/* ============================================
   GROUP INTERFACE STYLES
   ============================================ */

.group-interface {
    padding: 20px;
}

.group-interface-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.group-interface-header h2 {
    margin: 0;
    font-size: 28px;
}

/* Group Tabs */
.group-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
    overflow-x: auto;
}

.group-tab {
    background: none;
    border: none;
    padding: 12px 20px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
    white-space: nowrap;
}

.group-tab:hover {
    color: var(--primary);
    background: var(--bg-secondary);
}

.group-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.group-tab-content {
    min-height: 500px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* ============================================
   CHAT STYLES
   ============================================ */

.chat-container {
    display: flex;
    flex-direction: column;
    height: 600px;
    background: #f5f5f5;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #e0e0e0;
}

.chat-messages {
    flex: 1;
    min-height: 400px;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
    background: #fafafa;
}

.chat-messages:empty::after {
    content: 'Loading messages...';
    text-align: center;
    color: #999;
    padding: 40px;
    display: block;
}

.chat-message {
    padding: 12px 16px;
    border-radius: 12px;
    background: white;
    max-width: 70%;
    border: 1px solid #e8e8e8;
}

.chat-message.own-message {
    background: #1a73e8;
    color: white;
    margin-left: auto;
    border-color: #1557b0;
}

.chat-message strong {
    display: block;
    margin-bottom: 5px;
    font-size: 13px;
    font-weight: 600;
    color: #1a73e8;
}

.chat-message.own-message strong {
    color: white;
    opacity: 0.9;
}

.chat-message p {
    margin: 0;
    color: #333;
    line-height: 1.5;
    word-wrap: break-word;
}

.chat-message.own-message p {
    color: white;
}

.chat-message .timestamp {
    display: block;
    margin-top: 5px;
    font-size: 11px;
    opacity: 0.6;
    color: #666;
    text-align: right;
}

.chat-message.own-message .timestamp {
    color: rgba(255,255,255,0.9);
}

.chat-input-container {
    display: flex;
    gap: 10px;
    padding: 20px;
    border-top: 1px solid var(--border-color);
    background: white;
}

.chat-input-container input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
}

/* ============================================
   VIDEO CALL STYLES
   ============================================ */

.video-call-container {
    text-align: center;
    padding: 40px 20px;
}

.jitsi-container {
    margin: 20px 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.btn-large {
    font-size: 18px;
    padding: 16px 32px;
}

.video-info {
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* ============================================
   FILE SHARING STYLES (FREE STORAGE)
   ============================================ */

.files-container {
    padding: 20px;
}

.file-upload-section.free-storage {
    padding: 30px 20px;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border-radius: 12px;
    margin-bottom: 30px;
    border: 2px solid #86efac;
}

.file-upload-section.free-storage h3 {
    margin: 0 0 20px 0;
    text-align: center;
    color: #166534;
}

.upload-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

.upload-option {
    background: white;
    padding: 20px;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    text-align: center;
}

.upload-option h4 {
    margin: 0 0 10px 0;
    font-size: 16px;
    color: var(--text-primary);
}

.upload-option p {
    margin: 0 0 15px 0;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.free-storage-info {
    background: white;
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid #22c55e;
}

.free-storage-info p {
    margin: 0 0 10px 0;
    font-weight: 600;
    color: #166534;
}

.free-storage-info ul {
    margin: 0;
    padding-left: 20px;
}

.free-storage-info li {
    margin: 6px 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.file-info {
    margin-top: 15px;
    color: var(--text-secondary);
    font-size: 14px;
}

.files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.file-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s;
}

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

.file-card.base64-card {
    border-left: 4px solid #22c55e;
}

.file-card.external-link-card {
    border-left: 4px solid #3b82f6;
}

.file-icon {
    font-size: 40px;
}

.file-info h4 {
    margin: 0 0 5px 0;
    font-size: 15px;
}

.file-info p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 13px;
}

.file-desc {
    margin-top: 8px !important;
    font-style: italic;
    color: var(--text-secondary) !important;
}

.free-badge {
    display: inline-block;
    background: #22c55e;
    color: white;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    margin-top: 5px;
}

.service-badge {
    display: inline-block;
    background: #3b82f6;
    color: white;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    margin-right: 5px;
}

.file-actions {
    margin-left: auto;
}

/* ============================================
   QUIZ STYLES
   ============================================ */

.quizzes-container {
    padding: 20px;
}

.quiz-actions {
    text-align: center;
    margin-bottom: 30px;
}

.quizzes-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.quiz-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.quiz-card h4 {
    margin: 0 0 10px 0;
    font-size: 18px;
}

.quiz-card p {
    margin: 8px 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.quiz-meta {
    font-size: 12px !important;
    opacity: 0.7;
}

/* ============================================
   LEADERBOARD STYLES
   ============================================ */

.leaderboard-container {
    padding: 20px;
}

.leaderboard-container h3 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 24px;
}

.leaderboard-filters {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.filter-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.leaderboard {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.leaderboard-entry {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    align-items: center;
    gap: 15px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.leaderboard-entry:last-child {
    border-bottom: none;
}

.leaderboard-entry.top-three {
    background: linear-gradient(to right, #fef3c7, transparent);
}

.leaderboard-entry .rank {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
}

.leaderboard-entry .name {
    font-weight: 600;
    font-size: 16px;
}

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

/* ============================================
   SCHEDULE STYLES
   ============================================ */

.schedule-container {
    padding: 20px;
}

.schedule-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.schedule-header h3 {
    margin: 0;
}

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

.session-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.session-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.session-card.past-session {
    opacity: 0.6;
    background: #f5f5f5;
}

.session-card h4 {
    margin: 0 0 15px 0;
    font-size: 18px;
    color: var(--primary-color);
}

.session-card p {
    margin: 8px 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.session-card .btn {
    margin-top: 10px;
}

/* ============================================
   MEMBERS STYLES
   ============================================ */

.members-container {
    padding: 20px;
}

.members-container h3 {
    margin-bottom: 20px;
}

.members-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

.member-card {
    display: flex;
    align-items: center;
    gap: 15px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
}

.member-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
}

.member-info h4 {
    margin: 0 0 5px 0;
    font-size: 15px;
}

.member-info p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 13px;
}

/* ============================================
   EMPTY STATES
   ============================================ */

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    font-size: 16px;
}

/* ============================================
   SHARE LINK MODAL STYLES
   ============================================ */

.share-link-modal .modal-content {
    max-width: 700px;
}

.external-services {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0 30px 0;
}

.service-card {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    border: 2px solid var(--border-color);
}

.service-card h4 {
    margin: 0 0 15px 0;
    font-size: 16px;
}

.service-card ol {
    margin: 0 0 15px 0;
    padding-left: 20px;
    font-size: 13px;
    color: var(--text-secondary);
}

.service-card li {
    margin: 5px 0;
}

.service-card .btn {
    width: 100%;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    .upload-options {
        grid-template-columns: 1fr;
    }
    
    .external-services {
        grid-template-columns: 1fr;
    }
    .group-interface-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .group-tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .group-tab {
        flex-shrink: 0;
    }
    
    .study-group-modal .form-row {
        grid-template-columns: 1fr;
    }
    
    .files-grid,
    .quizzes-list,
    .schedule-list,
    .members-list {
        grid-template-columns: 1fr;
    }
    
    .chat-container {
        height: 500px;
    }
    
    .chat-message {
        max-width: 85%;
    }
}

/* ============================================
   DARK MODE
   ============================================ */

body.dark-mode .chat-container {
    background: #2a2a2a;
    border-color: #444;
}

body.dark-mode .chat-messages {
    background: #1e1e1e;
}

body.dark-mode .chat-message {
    background: #2d2d2d;
    border-color: #444;
    color: #e0e0e0;
}

body.dark-mode .chat-message p {
    color: #e0e0e0;
}

body.dark-mode .chat-message strong {
    color: #64b5f6;
}

body.dark-mode .file-upload-section {
    background: var(--bg-primary);
}

body.dark-mode .file-card,
body.dark-mode .quiz-card,
body.dark-mode .leaderboard,
body.dark-mode .session-card,
body.dark-mode .member-card {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

body.dark-mode .chat-message {
    background: var(--bg-secondary);
}

body.dark-mode .chat-message.own-message {
    background: var(--primary);
}

body.dark-mode .chat-input-container {
    background: var(--bg-primary);
}