/* ============================================
   АВК AI - Main Stylesheet
   ============================================ */

/* CSS Variables - Light Theme */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --accent: #f59e0b;
    --danger: #ef4444;
    --success: #22c55e;

    --bg-dark: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --bg-input: #ffffff;

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-lg: 20px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    --transition: all 0.3s ease;

    /* Module colors */
    --career-color: #f59e0b;
    --academic-color: #10b981;
    --lab-color: #8b5cf6;
    --medical-color: #ef4444;
    --business-color: #3b82f6;
    --coding-color: #06b6d4;
    --sales-color: #ec4899;

    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-bg: #1e293b;
    --sidebar-text: #94a3b8;
    --sidebar-text-hover: #ffffff;
    --sidebar-active-bg: var(--primary);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-logo i {
    color: var(--primary);
    font-size: 1.8rem;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 10px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.nav-link .fa-chevron-down {
    font-size: 0.7rem;
    transition: var(--transition);
}

.nav-item:hover .fa-chevron-down {
    transform: rotate(180deg);
}

/* Dropdown */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 250px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 8px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    box-shadow: var(--shadow-xl);
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
}

.dropdown-menu li a:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.dropdown-menu li a i {
    width: 20px;
    text-align: center;
    color: var(--primary);
}

/* Mobile Navigation */
@media (max-width: 900px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
        transform: translateX(-100%);
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: var(--bg-card-hover);
        margin-top: 8px;
        display: none;
    }

    .nav-item.active .dropdown-menu {
        display: block;
    }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 20px 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #f8fafc 100%);
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: 120px;
    fill: var(--bg-dark);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
}

.btn-success {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ============================================
   Modules Section
   ============================================ */
.modules {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 48px;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.module-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.module-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.module-card.career {
    border-top: 3px solid var(--career-color);
}

.module-card.career .module-icon {
    background: rgba(245, 158, 11, 0.1);
    color: var(--career-color);
}

.module-card.academic {
    border-top: 3px solid var(--academic-color);
}

.module-card.academic .module-icon {
    background: rgba(16, 185, 129, 0.1);
    color: var(--academic-color);
}

.module-card.laboratory {
    border-top: 3px solid var(--lab-color);
}

.module-card.laboratory .module-icon {
    background: rgba(139, 92, 246, 0.1);
    color: var(--lab-color);
}

.module-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.module-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.module-card>p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.module-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-card-hover);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
}

.feature-link:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateX(5px);
}

.feature-link i {
    font-size: 1.2rem;
    color: var(--primary);
    width: 24px;
    text-align: center;
}

.feature-link span {
    font-weight: 500;
}

.feature-link small {
    display: block;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 2px;
}

/* ============================================
   About Section
   ============================================ */
.about {
    padding: 80px 0;
    background: var(--bg-card);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
}

.about-content h2 {
    font-size: 2rem;
    margin-bottom: 32px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.about-feature {
    display: flex;
    gap: 16px;
}

.about-feature .feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(99, 102, 241, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.about-feature h4 {
    margin-bottom: 4px;
}

.about-feature p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.stats-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ============================================
   Specialties Section
   ============================================ */
.specialties {
    padding: 80px 0;
}

.specialties-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-top: 40px;
}

.specialty-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

.specialty-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
}

.specialty-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.specialty-card span {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
}

.specialty-card small {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 16px;
}

.footer-logo i {
    color: var(--primary);
}

.footer-brand p {
    color: var(--text-secondary);
    max-width: 300px;
}

.footer-links h4 {
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* ============================================
   Page Layout (for inner pages)
   ============================================ */
.page-header {
    padding: 120px 20px 60px;
    text-align: center;
    background: var(--bg-dark);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.page-header p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.page-content {
    padding: 60px 0;
    min-height: calc(100vh - 400px);
}

/* ============================================
   Forms & Inputs
   ============================================ */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 48px;
}

.form-select option {
    background: var(--bg-card);
    color: var(--text-primary);
}

/* File Upload */
.file-upload {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.file-upload:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.file-upload i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.file-upload p {
    color: var(--text-secondary);
}

.file-upload input {
    display: none;
}

/* ============================================
   Cards & Panels
   ============================================ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 24px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title i {
    color: var(--primary);
}

/* ============================================
   Chat Interface
   ============================================ */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 500px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-message {
    display: flex;
    gap: 12px;
    max-width: 80%;
}

.chat-message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.chat-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    flex-shrink: 0;
}

.chat-message.user .chat-avatar {
    background: var(--secondary);
}

.chat-bubble {
    background: var(--bg-card-hover);
    padding: 12px 16px;
    border-radius: 16px;
    border-top-left-radius: 4px;
}

.chat-message.user .chat-bubble {
    background: var(--primary);
    border-radius: 16px;
    border-top-right-radius: 4px;
}

.chat-input-area {
    display: flex;
    gap: 12px;
    padding: 16px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-card);
}

.chat-input {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    color: var(--text-primary);
    font-size: 1rem;
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary);
}

.chat-send {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.chat-send:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

/* ============================================
   Code Editor
   ============================================ */
.code-editor {
    background: #1e1e1e;
    border-radius: var(--border-radius);
    overflow: hidden;
    font-family: 'Fira Code', 'Monaco', monospace;
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: #2d2d2d;
    border-bottom: 1px solid #404040;
}

.code-dots {
    display: flex;
    gap: 8px;
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red {
    background: #ff5f56;
}

.code-dot.yellow {
    background: #ffbd2e;
}

.code-dot.green {
    background: #27ca40;
}

.code-language {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.code-textarea {
    width: 100%;
    min-height: 200px;
    padding: 16px;
    background: transparent;
    border: none;
    color: #d4d4d4;
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.6;
    resize: vertical;
}

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

/* ============================================
   Result Panels
   ============================================ */
.result-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-top: 24px;
}

.result-panel.success {
    border-color: var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.result-panel.error {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.result-panel.warning {
    border-color: var(--accent);
    background: rgba(245, 158, 11, 0.1);
}

.result-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.result-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.result-panel.success .result-icon {
    background: var(--success);
    color: white;
}

.result-panel.error .result-icon {
    background: var(--danger);
    color: white;
}

.result-panel.warning .result-icon {
    background: var(--accent);
    color: white;
}

/* ============================================
   Tabs
   ============================================ */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

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

.tab-content {
    display: none;
}

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

/* ============================================
   Tags & Badges
   ============================================ */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-card-hover);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-success {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--accent);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.badge-info {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary);
}

/* ============================================
   Loading & Animations
   ============================================ */
.loading {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-indicator span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {

    0%,
    80%,
    100% {
        transform: scale(0);
    }

    40% {
        transform: scale(1);
    }
}

/* Fade animations */
.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Score/Progress Display
   ============================================ */
.score-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: conic-gradient(var(--primary) var(--progress, 0%), var(--bg-card-hover) 0%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.score-circle::before {
    content: '';
    position: absolute;
    width: 100px;
    height: 100px;
    background: var(--bg-card);
    border-radius: 50%;
}

.score-value {
    position: relative;
    z-index: 1;
    font-size: 1.5rem;
    font-weight: 700;
}

.progress-bar {
    height: 8px;
    background: var(--bg-card-hover);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 4px;
    transition: width 0.5s ease;
}

/* ============================================
   Utilities
   ============================================ */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-1 {
    margin-top: 8px;
}

.mt-2 {
    margin-top: 16px;
}

.mt-3 {
    margin-top: 24px;
}

.mt-4 {
    margin-top: 32px;
}

.mb-1 {
    margin-bottom: 8px;
}

.mb-2 {
    margin-bottom: 16px;
}

.mb-3 {
    margin-bottom: 24px;
}

.mb-4 {
    margin-bottom: 32px;
}

.flex {
    display: flex;
}

.flex-center {
    align-items: center;
    justify-content: center;
}

.flex-between {
    justify-content: space-between;
}

.flex-wrap {
    flex-wrap: wrap;
}

.gap-1 {
    gap: 8px;
}

.gap-2 {
    gap: 16px;
}

.gap-3 {
    gap: 24px;
}

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

/* Grid layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.grid-1-2 {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 24px;
}

.grid-2-1 {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

@media (max-width: 900px) {

    .grid-2,
    .grid-3,
    .grid-1-2,
    .grid-2-1 {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .stats-card {
        grid-template-columns: 1fr;
    }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ============================================
   Sidebar Navigation
   ============================================ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #ffffff;
    font-weight: 700;
    font-size: 1.25rem;
}

.sidebar-logo i {
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: 10px;
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.95rem;
}

.sidebar-link:hover {
    color: var(--sidebar-text-hover);
    background: rgba(255, 255, 255, 0.1);
}

.sidebar-link.active {
    color: #ffffff;
    background: var(--sidebar-active-bg);
}

.sidebar-link i {
    width: 20px;
    text-align: center;
    font-size: 1rem;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-footer p {
    color: var(--sidebar-text);
    font-size: 0.8rem;
    text-align: center;
}

/* Main content with sidebar */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background: var(--bg-dark);
}

.main-content .page-header {
    padding: 40px 40px 30px;
    text-align: left;
    background: var(--bg-dark);
}

.main-content .page-header h1 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.main-content .page-content {
    padding: 0 40px 40px;
}

/* Hide old navbar when sidebar is used */
.app-layout .navbar {
    display: none;
}

/* Mobile sidebar */
@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
        transition: var(--transition);
    }

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

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

    .main-content .page-header,
    .main-content .page-content {
        padding-left: 20px;
        padding-right: 20px;
    }

    .mobile-toggle {
        display: flex !important;
    }
}

.mobile-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    width: 44px;
    height: 44px;
    background: var(--sidebar-bg);
    border: none;
    border-radius: 10px;
    color: #ffffff;
    font-size: 1.2rem;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

@media (max-width: 900px) {
    .sidebar.active+.sidebar-overlay {
        display: block;
    }
}