/* Classroom Features Styles */

/* Hide main header when classroom mode is active, but only if no specific conversation is loaded */
main-content[data-classroom-mode="active"]:not(.has-chat) ~ .main-header,
main-content[data-classroom-mode="active"]:not(.has-chat) .main-header {
    display: none !important;
}

/* Also hide header on initial page load for classroom URL, but not if there's a conversation */
body[data-special-mode="classroom"][data-has-conversation="false"] .main-header {
    display: none !important;
}

/* Map Classroom variables to Global Theme Variables */
.classroom-content {
    /* Core colors */
    --classroom-primary: var(--accent);
    --classroom-primary-dark: var(--accent-hover);
    --classroom-accent: rgba(255, 196, 0, 0.1);

    /* Surfaces */
    --classroom-surface: var(--surface-card);
    --classroom-surface-elevated: var(--tool-bg);
    --classroom-card-bg: var(--input-bg);

    /* Text */
    --classroom-text-primary: var(--text-primary);
    --classroom-text-secondary: var(--text-secondary);
    --classroom-text-faded: var(--text-faded);

    /* Borders */
    --classroom-border: var(--border-color);

    /* Shadows */
    --classroom-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    --classroom-shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.1);

    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    overflow-y: auto;
    background: var(--main-bg);
    padding: 2rem;
    color: var(--classroom-text-primary);
}

/* Header Section */
.classroom-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.classroom-header h1 {
    font-size: 2rem;
    color: var(--classroom-text-primary);
    margin: 0;
}

.user-profile-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: var(--classroom-surface-elevated);
    border-radius: 12px;
    border: 1px solid var(--classroom-border);
    box-shadow: var(--classroom-shadow-sm);
}

.user-avatar-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--classroom-primary), var(--classroom-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000;
    font-weight: bold;
}

/* Welcome Section */
.welcome-banner {
    background: var(--classroom-accent);
    color: white;
    padding: 2rem;
    border-radius: 20px;
    margin-bottom: 2rem;
    border: 1px solid rgba(245, 158, 11, 0.12);
}

.welcome-banner h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: white;
}

.welcome-banner p {
    color: var(--classroom-text-secondary);
}

/* Action Cards */
.action-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.action-card-item {
    background: var(--classroom-surface);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--classroom-border);
}

.action-card-item:hover {
    transform: translateY(-4px);
    border-color: var(--classroom-primary);
    box-shadow: var(--classroom-shadow);
}

.action-card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--classroom-primary);
}

.action-card-item h3 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.action-card-item p {
    font-size: 0.9rem;
    color: var(--classroom-text-secondary);
}

/* Section Header */
.section-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

/* Course Grid */
.course-grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.course-card-modern {
    background: var(--classroom-card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--classroom-border);
    transition: all 0.22s ease;
    cursor: pointer;
}

.course-card-modern:hover {
    transform: translateY(-4px);
    border-color: var(--classroom-primary);
    box-shadow: var(--classroom-shadow);
}

.course-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.course-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(245, 158, 11, 0.12);
    color: var(--classroom-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.course-card-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--classroom-text-primary);
}

.course-card-desc {
    color: var(--classroom-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--classroom-text-secondary);
    margin-bottom: 1rem;
}

.course-code-badge {
    background: var(--classroom-surface);
    padding: 4px 12px;
    border-radius: 20px;
    font-family: monospace;
    font-weight: 600;
    color: var(--classroom-text-secondary);
    display: inline-block;
}

/* Modal Overrides for Classroom */
.classroom-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.classroom-modal-overlay.show {
    display: flex;
}

.classroom-modal {
    background: var(--classroom-surface-elevated);
    border-radius: 20px;
    width: 90%;
    max-width: 520px;
    border: 1px solid var(--classroom-border);
    box-shadow: var(--classroom-shadow);
    padding: 0;
    color: var(--classroom-text-primary);
}

.classroom-modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--classroom-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.classroom-modal-form {
    padding: 1.5rem;
}

/* FAB */
.classroom-fab-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--classroom-primary);
    color: #000;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--classroom-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
    z-index: 100;
}

.classroom-fab-btn:hover {
    transform: scale(1.1);
}

/* Responsive */
@media (max-width: 768px) {
    .classroom-content {
        padding: 1rem;
    }

    .course-grid-container {
        grid-template-columns: 1fr;
    }
}

/* --- Stream View / Course Detail Styles --- */

.course-header-detail {
    background: var(--classroom-surface-elevated);
    border: 1px solid var(--classroom-border);
    border-radius: 16px;
    padding: 2.5rem;
    margin-bottom: 2.5rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--classroom-shadow-sm);
}

.course-header-glow {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--classroom-accent) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.5;
}

.course-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
    position: relative;
    z-index: 2;
}

.course-title-detail {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 0.8rem;
    color: var(--classroom-text-primary);
    letter-spacing: -0.5px;
}

.course-description-detail {
    font-size: 1.1rem;
    opacity: 0.9;
    color: var(--classroom-text-secondary);
    max-width: 600px;
    line-height: 1.6;
}

.course-meta-row {
    margin-top: 1.5rem;
    display: flex;
    gap: 10px;
}

.course-code-badge {
    background: var(--classroom-surface);
    padding: 0.6rem 1.2rem;
    border-radius: 999px;
    font-family: monospace;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--classroom-primary);
    border: 1px solid var(--classroom-border);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.course-code-badge:hover {
    background: var(--classroom-surface-elevated);
    border-color: var(--classroom-primary);
    transform: translateY(-1px);
    box-shadow: var(--classroom-shadow-sm);
}

.course-header-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-header-primary {
    padding: 10px 20px;
    background: var(--classroom-primary);
    border: none;
    color: #000;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 700;
    box-shadow: var(--classroom-shadow-sm);
    transition: transform 0.2s;
    min-height: 44px;
    white-space: nowrap;
}

.btn-header-primary:hover {
    transform: translateY(-2px);
    background: var(--classroom-primary-dark);
}

.btn-header-secondary {
    padding: 10px 20px;
    background: var(--classroom-surface);
    border: 1px solid var(--classroom-border);
    color: var(--classroom-text-primary);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    transition: all 0.2s;
    min-height: 44px;
    white-space: nowrap;
}

.btn-header-secondary:hover {
    background: var(--classroom-surface-elevated);
    border-color: var(--classroom-text-secondary);
}

/* Tabs */
.classroom-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--classroom-border);
    padding-bottom: 0px;
}

.classroom-tab {
    padding: 12px 24px;
    background: transparent;
    color: var(--classroom-text-secondary);
    border: none;
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    font-weight: 500;
    position: relative;
    bottom: -1px;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.classroom-tab:hover {
    color: var(--classroom-text-primary);
    background: var(--classroom-surface);
}

.classroom-tab.active {
    color: var(--classroom-primary);
    border-bottom: 3px solid var(--classroom-primary);
    font-weight: 600;
}

.tab-badge {
    background: var(--classroom-surface);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    margin-left: 0;
    border: 1px solid var(--classroom-border);
}

/* Teacher vs Student View Distinctions */
.teacher-view {
    border-left: 4px solid var(--classroom-primary);
}

.student-view {
    border-left: 4px solid #10b981; /* Green for student view */
}

.student-view .course-header-actions {
    gap: 0.5rem; /* Smaller gap when only share button */
}

.student-view .btn-header-secondary {
    background: var(--classroom-surface-elevated);
    color: var(--classroom-text-primary);
}

.student-view .btn-header-secondary:hover {
    background: var(--classroom-primary);
    color: var(--text-primary);
}

/* Student-specific quick action buttons */
.quick-action-btn:hover {
    background: var(--classroom-surface);
    transform: translateY(-2px);
}

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

/* Current user highlight in student People tab */
.student-view .student-avatar-container {
    position: relative;
}

.student-view .current-user-indicator {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #10b981;
    color: white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: bold;
    border: 2px solid white;
}