/* Base styles for AI Learning Platform */

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --sidebar-width: 280px;
    --navbar-height: 56px;
}

/* Layout */
body {
    padding-top: var(--navbar-height);
}

.main-wrapper {
    display: flex;
    min-height: calc(100vh - var(--navbar-height));
}

.main-content {
    flex: 1;
    padding: 2rem;
    max-width: 100%;
}

.main-content.with-sidebar {
    margin-left: var(--sidebar-width);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--navbar-height));
    background: var(--bs-body-bg);
    border-right: 1px solid var(--bs-border-color);
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--bs-border-color);
}

.sidebar-nav {
    padding: 1rem 0;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--bs-body-color);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
}

.sidebar-nav .nav-link:hover {
    background: var(--bs-tertiary-bg);
    border-left-color: var(--bs-primary);
}

.sidebar-nav .nav-link.active {
    background: var(--bs-primary-bg-subtle);
    border-left-color: var(--bs-primary);
    font-weight: 600;
}

.sidebar-nav .nav-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    margin-right: 0.75rem;
    border-radius: 50%;
    background: var(--bs-tertiary-bg);
    font-size: 0.75rem;
    font-weight: 600;
}

.sidebar-nav .nav-link.active .nav-number {
    background: var(--bs-primary);
    color: white;
}

/* Code Editor */
.code-editor-container {
    border: 1px solid var(--bs-border-color);
    border-radius: 0.5rem;
    overflow: hidden;
    margin: 1rem 0;
}

.code-editor-header {
    padding: 0.5rem 1rem;
    background: var(--bs-tertiary-bg);
    border-bottom: 1px solid var(--bs-border-color);
}

.code-editor-body {
    background: #1e1e1e;
}

.code-textarea {
    width: 100%;
    padding: 1rem;
    border: none;
    background: #1e1e1e;
    color: #d4d4d4;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.5;
    resize: vertical;
}

.code-textarea:focus {
    outline: none;
}

.code-output-container {
    border-top: 1px solid var(--bs-border-color);
}

.code-output-header {
    padding: 0.5rem 1rem;
    background: var(--bs-tertiary-bg);
    font-size: 0.875rem;
    font-weight: 600;
}

.code-output {
    margin: 0;
    padding: 1rem;
    background: #1a1a1a;
    color: #d4d4d4;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    max-height: 300px;
    overflow-y: auto;
}

.code-output.success {
    border-left: 3px solid #28a745;
}

.code-output.error {
    border-left: 3px solid #dc3545;
    color: #ff6b6b;
}

/* Code Block */
.code-block {
    position: relative;
    margin: 1rem 0;
    border-radius: 0.5rem;
    overflow: hidden;
}

.code-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background: #2d2d2d;
}

.language-badge {
    font-size: 0.75rem;
    color: #888;
    text-transform: uppercase;
}

.code-block pre {
    margin: 0;
    padding: 1rem;
    background: #1e1e1e;
}

.code-block code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
}

/* Quiz */
.quiz-option {
    padding: 0.75rem 1rem;
    margin: 0.25rem 0;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.quiz-option:hover {
    background: var(--bs-tertiary-bg);
}

.quiz-option.correct {
    background: rgba(40, 167, 69, 0.15);
    border: 1px solid #28a745;
}

.quiz-option.incorrect {
    background: rgba(220, 53, 69, 0.15);
    border: 1px solid #dc3545;
}

/* Cards */
.module-card {
    display: block;
    padding: 1.5rem;
    border-radius: 1rem;
    background: var(--bs-body-bg);
    border: 2px solid var(--bs-border-color);
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.module-card:hover {
    border-color: var(--bs-primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-5px);
    text-decoration: none;
    color: inherit;
}

.metric-card {
    border: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* Badges */
.difficulty-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.difficulty-badge.beginner {
    background: #d4edda;
    color: #155724;
}

.difficulty-badge.intermediate {
    background: #fff3cd;
    color: #856404;
}

.difficulty-badge.advanced {
    background: #f8d7da;
    color: #721c24;
}

/* Loading Overlay */
#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* Progress indicator */
.progress-ring {
    width: 120px;
    height: 120px;
}

.progress-ring__circle {
    transition: stroke-dashoffset 0.35s;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
}

/* Responsive */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .main-content.with-sidebar {
        margin-left: 0;
    }
}

/* Dark mode adjustments */
[data-bs-theme="dark"] {
    --bs-body-bg: #1a1a1a;
    --bs-tertiary-bg: #2d2d2d;
}

[data-bs-theme="dark"] .code-textarea,
[data-bs-theme="dark"] .code-output {
    background: #0d0d0d;
}

[data-bs-theme="dark"] .module-card {
    background: #2d2d2d;
    border-color: #404040;
}

[data-bs-theme="dark"] .difficulty-badge.beginner {
    background: rgba(40, 167, 69, 0.2);
    color: #75d69c;
}

[data-bs-theme="dark"] .difficulty-badge.intermediate {
    background: rgba(255, 193, 7, 0.2);
    color: #ffd54f;
}

[data-bs-theme="dark"] .difficulty-badge.advanced {
    background: rgba(220, 53, 69, 0.2);
    color: #ff8a80;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

/* Learning content styling */
.learning-content h2 {
    margin-top: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--bs-primary);
}

.learning-content h3 {
    margin-top: 1.5rem;
    color: var(--bs-primary);
}

.learning-content .tip {
    padding: 1rem;
    margin: 1rem 0;
    background: var(--bs-info-bg-subtle);
    border-left: 4px solid var(--bs-info);
    border-radius: 0.25rem;
}

.learning-content .warning {
    padding: 1rem;
    margin: 1rem 0;
    background: var(--bs-warning-bg-subtle);
    border-left: 4px solid var(--bs-warning);
    border-radius: 0.25rem;
}

.learning-content .example {
    padding: 1rem;
    margin: 1rem 0;
    background: var(--bs-success-bg-subtle);
    border-left: 4px solid var(--bs-success);
    border-radius: 0.25rem;
}

/* Confusion Matrix */
.confusion-matrix table {
    font-size: 0.875rem;
}

.confusion-matrix th {
    background: var(--bs-tertiary-bg);
}

/* Page Navigation */
.page-navigation .btn {
    min-width: 150px;
}

@media (max-width: 575.98px) {
    .page-navigation .btn {
        min-width: auto;
        padding: 0.5rem;
    }

    .page-navigation .btn span {
        display: none;
    }
}