/* AI Tutor App Styles */
.ai-tutor-container {
    font-family: 'Red Hat Display', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--ai-tutor-text);
    background: var(--ai-tutor-bg);
    min-height: 100vh;
    position: relative;
}

.ai-tutor-container * {
    box-sizing: border-box;
}

/* CSS Variables */
.ai-tutor-container {
    --ai-tutor-primary: #6366f1;
    --ai-tutor-primary-hover: #4f46e5;
    --ai-tutor-secondary: #8b5cf6;
    --ai-tutor-success: #10b981;
    --ai-tutor-warning: #f59e0b;
    --ai-tutor-error: #ef4444;
    --ai-tutor-bg: #ffffff;
    --ai-tutor-bg-secondary: #f8fafc;
    --ai-tutor-bg-tertiary: #f1f5f9;
    --ai-tutor-text: #1e293b;
    --ai-tutor-text-secondary: #64748b;
    --ai-tutor-border: #e2e8f0;
    --ai-tutor-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --ai-tutor-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --ai-tutor-radius: 12px;
    --ai-tutor-radius-sm: 8px;
    --ai-tutor-sidebar-width: 280px;
}

.ai-tutor-container.dark-mode {
    --ai-tutor-bg: #0f172a;
    --ai-tutor-bg-secondary: #1e293b;
    --ai-tutor-bg-tertiary: #334155;
    --ai-tutor-text: #f1f5f9;
    --ai-tutor-text-secondary: #94a3b8;
    --ai-tutor-border: #334155;
}

/* Header */
.ai-tutor-header {
    background: var(--ai-tutor-bg);
    border-bottom: 1px solid var(--ai-tutor-border);
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.ai-tutor-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--ai-tutor-primary);
}

.ai-tutor-logo svg {
    width: 32px;
    height: 32px;
}

.ai-tutor-header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Buttons */
.ai-tutor-btn {
    font-family: 'Red Hat Display', sans-serif;
    font-size: 15px;
    font-weight: 500;
    padding: 10px 20px;
    border: none;
    border-radius: var(--ai-tutor-radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.ai-tutor-btn-primary {
    background: var(--ai-tutor-primary);
    color: white;
}

.ai-tutor-btn-primary:hover {
    background: var(--ai-tutor-primary-hover);
    transform: translateY(-1px);
}

.ai-tutor-btn-secondary {
    background: var(--ai-tutor-bg-tertiary);
    color: var(--ai-tutor-text);
}

.ai-tutor-btn-secondary:hover {
    background: var(--ai-tutor-border);
}

.ai-tutor-btn-icon {
    padding: 8px;
    background: transparent;
    color: var(--ai-tutor-text-secondary);
}

.ai-tutor-btn-icon:hover {
    background: var(--ai-tutor-bg-tertiary);
    color: var(--ai-tutor-text);
}

.ai-tutor-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Main Layout */
.ai-tutor-main {
    display: flex;
    min-height: calc(100vh - 70px);
}

/* Sidebar */
.ai-tutor-sidebar {
    width: var(--ai-tutor-sidebar-width);
    background: var(--ai-tutor-bg-secondary);
    border-right: 1px solid var(--ai-tutor-border);
    padding: 20px;
    overflow-y: auto;
    transition: transform 0.3s ease;
}

.ai-tutor-sidebar-section {
    margin-bottom: 25px;
}

.ai-tutor-sidebar-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--ai-tutor-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

/* Form Elements */
.ai-tutor-form-group {
    margin-bottom: 15px;
}

.ai-tutor-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--ai-tutor-text);
}

.ai-tutor-select,
.ai-tutor-textarea,
.ai-tutor-input {
    font-family: 'Red Hat Display', sans-serif;
    font-size: 15px;
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--ai-tutor-border);
    border-radius: var(--ai-tutor-radius-sm);
    background: var(--ai-tutor-bg);
    color: var(--ai-tutor-text);
    transition: border-color 0.2s ease;
}

.ai-tutor-select {
    height: 45px;
    cursor: pointer;
}

.ai-tutor-textarea {
    min-height: 120px;
    resize: vertical;
}

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

/* Content Area */
.ai-tutor-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

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

.ai-tutor-content-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--ai-tutor-text);
}

/* Content Cards */
.ai-tutor-card {
    background: var(--ai-tutor-bg);
    border: 1px solid var(--ai-tutor-border);
    border-radius: var(--ai-tutor-radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--ai-tutor-shadow);
}

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

.ai-tutor-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--ai-tutor-text);
}

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

/* Generated Content Display */
.ai-tutor-generated-content {
    background: var(--ai-tutor-bg-secondary);
    border-radius: var(--ai-tutor-radius);
    padding: 25px;
    margin-bottom: 20px;
    min-height: 200px;
}

.ai-tutor-generated-content h1,
.ai-tutor-generated-content h2,
.ai-tutor-generated-content h3 {
    color: var(--ai-tutor-text);
    margin-top: 0;
    margin-bottom: 15px;
}

.ai-tutor-generated-content p {
    margin-bottom: 12px;
    line-height: 1.7;
}

.ai-tutor-generated-content ul,
.ai-tutor-generated-content ol {
    margin-bottom: 15px;
    padding-left: 20px;
}

.ai-tutor-generated-content li {
    margin-bottom: 8px;
}

/* Image Display */
.ai-tutor-image-container {
    position: relative;
    border-radius: var(--ai-tutor-radius);
    overflow: hidden;
    margin-bottom: 20px;
}

.ai-tutor-image-container img {
    width: 100%;
    height: auto;
    display: block;
}

.ai-tutor-image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    padding: 20px;
    display: flex;
    gap: 10px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.ai-tutor-image-container:hover .ai-tutor-image-overlay {
    opacity: 1;
}

/* Video Container */
.ai-tutor-video-container {
    position: relative;
    border-radius: var(--ai-tutor-radius);
    overflow: hidden;
    background: #000;
    margin-bottom: 20px;
}

.ai-tutor-video-container video {
    width: 100%;
    display: block;
}

/* Audio Player */
.ai-tutor-audio-container {
    background: var(--ai-tutor-bg-secondary);
    border-radius: var(--ai-tutor-radius);
    padding: 20px;
    margin-bottom: 20px;
}

.ai-tutor-audio-container audio {
    width: 100%;
}

/* Loading Spinner */
.ai-tutor-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    gap: 15px;
}

.ai-tutor-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--ai-tutor-border);
    border-top-color: var(--ai-tutor-primary);
    border-radius: 50%;
    animation: ai-tutor-spin 1s linear infinite;
}

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

.ai-tutor-loading-text {
    color: var(--ai-tutor-text-secondary);
    font-size: 15px;
}

/* Toast Notifications */
.ai-tutor-toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ai-tutor-toast {
    background: var(--ai-tutor-bg);
    border: 1px solid var(--ai-tutor-border);
    border-radius: var(--ai-tutor-radius-sm);
    padding: 15px 20px;
    box-shadow: var(--ai-tutor-shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    max-width: 400px;
    animation: ai-tutor-slide-in 0.3s ease;
}

@keyframes ai-tutor-slide-in {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.ai-tutor-toast-success {
    border-left: 4px solid var(--ai-tutor-success);
}

.ai-tutor-toast-error {
    border-left: 4px solid var(--ai-tutor-error);
}

.ai-tutor-toast-warning {
    border-left: 4px solid var(--ai-tutor-warning);
}

.ai-tutor-toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.ai-tutor-toast-content {
    flex: 1;
}

.ai-tutor-toast-title {
    font-weight: 600;
    margin-bottom: 2px;
}

.ai-tutor-toast-message {
    font-size: 14px;
    color: var(--ai-tutor-text-secondary);
}

.ai-tutor-toast-close {
    background: none;
    border: none;
    color: var(--ai-tutor-text-secondary);
    cursor: pointer;
    padding: 4px;
}

/* Modal */
.ai-tutor-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.ai-tutor-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.ai-tutor-modal {
    background: var(--ai-tutor-bg);
    border-radius: var(--ai-tutor-radius);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.ai-tutor-modal-overlay.active .ai-tutor-modal {
    transform: scale(1);
}

.ai-tutor-modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--ai-tutor-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ai-tutor-modal-title {
    font-size: 20px;
    font-weight: 600;
}

.ai-tutor-modal-close {
    background: none;
    border: none;
    color: var(--ai-tutor-text-secondary);
    cursor: pointer;
    padding: 8px;
}

.ai-tutor-modal-body {
    padding: 20px;
    overflow-y: auto;
    max-height: 60vh;
}

.ai-tutor-modal-body h3 {
    margin-top: 20px;
    margin-bottom: 10px;
    color: var(--ai-tutor-primary);
}

.ai-tutor-modal-body h3:first-child {
    margin-top: 0;
}

.ai-tutor-modal-body p {
    margin-bottom: 10px;
    line-height: 1.6;
}

.ai-tutor-modal-body ul {
    padding-left: 20px;
    margin-bottom: 15px;
}

.ai-tutor-modal-body li {
    margin-bottom: 8px;
}

/* Saved Items */
.ai-tutor-saved-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ai-tutor-saved-item {
    background: var(--ai-tutor-bg);
    border: 1px solid var(--ai-tutor-border);
    border-radius: var(--ai-tutor-radius-sm);
    padding: 12px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.ai-tutor-saved-item:hover {
    border-color: var(--ai-tutor-primary);
    box-shadow: var(--ai-tutor-shadow);
}

.ai-tutor-saved-item-info {
    flex: 1;
    min-width: 0;
}

.ai-tutor-saved-item-title {
    font-weight: 500;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ai-tutor-saved-item-meta {
    font-size: 13px;
    color: var(--ai-tutor-text-secondary);
}

.ai-tutor-saved-item-actions {
    display: flex;
    gap: 5px;
    margin-left: 10px;
}

/* Tabs */
.ai-tutor-tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--ai-tutor-border);
    padding-bottom: 10px;
}

.ai-tutor-tab {
    padding: 10px 20px;
    background: transparent;
    border: none;
    border-radius: var(--ai-tutor-radius-sm);
    cursor: pointer;
    font-family: 'Red Hat Display', sans-serif;
    font-size: 15px;
    font-weight: 500;
    color: var(--ai-tutor-text-secondary);
    transition: all 0.2s ease;
}

.ai-tutor-tab:hover {
    background: var(--ai-tutor-bg-tertiary);
    color: var(--ai-tutor-text);
}

.ai-tutor-tab.active {
    background: var(--ai-tutor-primary);
    color: white;
}

/* Mobile Sidebar Toggle */
.ai-tutor-sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--ai-tutor-primary);
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: var(--ai-tutor-shadow-lg);
    z-index: 99;
    align-items: center;
    justify-content: center;
}

/* Mobile Overlay */
.ai-tutor-sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 98;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.ai-tutor-sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .ai-tutor-sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 99;
        transform: translateX(-100%);
        box-shadow: var(--ai-tutor-shadow-lg);
    }

    .ai-tutor-sidebar.open {
        transform: translateX(0);
    }

    .ai-tutor-sidebar-toggle {
        display: flex;
    }

    .ai-tutor-content {
        padding: 15px;
    }

    .ai-tutor-header {
        padding: 12px 15px;
    }

    .ai-tutor-logo {
        font-size: 18px;
    }

    .ai-tutor-toast-container {
        left: 10px;
        right: 10px;
    }

    .ai-tutor-toast {
        min-width: auto;
        max-width: none;
    }

    .ai-tutor-modal {
        width: 95%;
        margin: 10px;
    }

    .ai-tutor-tabs {
        flex-wrap: wrap;
    }
}

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

.ai-tutor-empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.ai-tutor-empty-state h3 {
    margin-bottom: 10px;
    color: var(--ai-tutor-text);
}

/* Progress Bar */
.ai-tutor-progress {
    width: 100%;
    height: 4px;
    background: var(--ai-tutor-bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 10px;
}

.ai-tutor-progress-bar {
    height: 100%;
    background: var(--ai-tutor-primary);
    transition: width 0.3s ease;
}

/* Badge */
.ai-tutor-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    background: var(--ai-tutor-bg-tertiary);
    color: var(--ai-tutor-text-secondary);
}

.ai-tutor-badge-primary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--ai-tutor-primary);
}

/* Modification History */
.ai-tutor-mod-history {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
}

.ai-tutor-mod-item {
    padding: 8px 12px;
    background: var(--ai-tutor-bg);
    border-radius: var(--ai-tutor-radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.ai-tutor-mod-item:hover {
    background: var(--ai-tutor-bg-tertiary);
}

/* Download Button */
.ai-tutor-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--ai-tutor-success);
    color: white;
    border: none;
    border-radius: var(--ai-tutor-radius-sm);
    cursor: pointer;
    font-family: 'Red Hat Display', sans-serif;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.ai-tutor-download-btn:hover {
    background: #059669;
    transform: translateY(-1px);
}