/* ===== CSS Variables ===== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --accent: #f59e0b;
    --danger: #ef4444;

    --bg-body: #0d1117;
    --bg-sidebar: #161b22;
    --bg-content: #0d1117;
    --bg-card: #21262d;
    --bg-card-hover: #30363d;
    --bg-code: #161b22;

    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;

    --border: #30363d;
    --border-light: #484f58;

    --header-height: 60px;
    --sidebar-width: 280px;

    --radius: 8px;
    --radius-lg: 12px;

    --transition: all 0.2s ease;
}

/* Light Mode Overrides */
[data-theme="light"] {
    --bg-body: #ffffff;
    --bg-sidebar: #f6f8fa;
    --bg-content: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f3f4f6;
    --bg-code: #f6f8fa;

    --text-primary: #24292f;
    --text-secondary: #57606a;
    --text-muted: #6e7781;

    --border: #d0d7de;
    --border-light: #d8dee4;
}

/* UI Elements */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, #6366f1, #a855f7);
    z-index: 1002;
    transition: width 0.1s ease;
}

.nav-btn-icon {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

.search-container {
    position: relative;
    margin-bottom: 20px;
}

.search-input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-body);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

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

#searchResults {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-top: 5px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.search-result-item {
    display: block;
    padding: 10px;
    text-decoration: none;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}

.search-result-item:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.badgee {
    display: inline-block;
    padding: 2px 6px;
    font-size: 10px;
    border-radius: 4px;
    margin-right: 8px;
    background: var(--bg-code);
    border: 1px solid var(--border);
}

/* Completed Icon */
.check-icon {
    font-size: 14px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 15px;
}

a {
    text-decoration: none;
    color: var(--primary-light);
    transition: var(--transition);
}

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

code,
pre {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 8px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.logo i {
    font-size: 1.5rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 8px 16px;
    border-radius: var(--radius);
    background: var(--bg-card);
    border: 1px solid var(--border);
}

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

/* ===== Layout ===== */
.main-wrapper {
    display: flex;
    padding-top: var(--header-height);
    min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 16px 0;
    z-index: 900;
}

.sidebar-nav {
    padding: 0 12px;
}

.nav-section {
    margin-bottom: 8px;
}

.nav-section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 16px;
}

.nav-section-title i {
    font-size: 0.9rem;
    color: var(--primary-light);
    width: 20px;
    text-align: center;
}

.nav-item {
    display: block;
    padding: 8px 12px 8px 42px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-radius: var(--radius);
    transition: var(--transition);
}

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

.nav-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
}

.nav-section:first-child .nav-item {
    padding-left: 12px;
}

.nav-section:first-child .nav-item i {
    margin-right: 10px;
}

/* ===== Content ===== */
.content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-width: 0;
}

.article {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.breadcrumb a {
    color: var(--text-muted);
}

.breadcrumb a:hover {
    color: var(--primary-light);
}

/* Typography */
h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.3;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 48px 0 20px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

h2:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 32px;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 32px 0 16px;
}

h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 24px 0 12px;
}

p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.lead {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* Stats Bar */
.stats-bar {
    display: flex;
    gap: 24px;
    padding: 16px 20px;
    background: var(--bg-card);
    border-radius: var(--radius);
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.stat i {
    color: var(--primary-light);
}

/* Feature List */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 20px 0;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--text-secondary);
}

.feature-item i {
    color: var(--secondary);
    margin-top: 4px;
}

/* Module Cards */
.module-cards {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 20px 0;
}

.module-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.module-card:hover {
    border-color: var(--primary);
    background: var(--bg-card-hover);
    transform: translateX(4px);
}

.module-icon {
    width: 44px;
    height: 44px;
    background: rgba(99, 102, 241, 0.15);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--primary-light);
    flex-shrink: 0;
}

.module-info {
    flex: 1;
    min-width: 0;
}

.module-info h3 {
    font-size: 1rem;
    margin: 0 0 4px;
    color: var(--text-primary);
}

.module-info p {
    font-size: 0.875rem;
    margin: 0 0 6px;
    color: var(--text-muted);
}

.module-time {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.module-time i {
    margin-right: 4px;
}

.module-card>.fa-chevron-right {
    color: var(--text-muted);
    transition: var(--transition);
}

.module-card:hover>.fa-chevron-right {
    color: var(--primary-light);
    transform: translateX(4px);
}

/* Callout */
.callout {
    display: flex;
    gap: 12px;
    padding: 16px;
    border-radius: var(--radius);
    margin: 20px 0;
}

.callout i {
    font-size: 1.1rem;
    margin-top: 2px;
}

.callout-info {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.callout-info i {
    color: var(--primary-light);
}

.callout-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.callout-warning i {
    color: var(--accent);
}

.callout-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.callout-danger i {
    color: var(--danger);
}

.callout-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.callout-success i {
    color: var(--secondary);
}

/* Steps */
.steps {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 20px 0;
}

.step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.step-number {
    width: 32px;
    height: 32px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
}

.step-content {
    padding-top: 4px;
}

.step-content strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.step-content span {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Code Block */
.code-block {
    margin: 20px 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.copy-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}

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

.copy-btn.copied {
    color: var(--secondary);
}

.code-block pre {
    margin: 0;
    padding: 16px;
    background: var(--bg-code);
    overflow-x: auto;
}

.code-block code {
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Inline code */
p code,
li code {
    background: var(--bg-card);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--primary-light);
}

/* Links Grid */
.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.link-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
}

.link-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.link-card i {
    font-size: 1.5rem;
    color: var(--primary-light);
}

.link-card span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.9rem;
}

th,
td {
    padding: 12px 16px;
    border: 1px solid var(--border);
    text-align: left;
}

th {
    background: var(--bg-card);
    font-weight: 600;
    color: var(--text-primary);
}

td {
    color: var(--text-secondary);
}

tr:hover td {
    background: var(--bg-card);
}

/* Page Navigation */
.page-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.nav-prev,
.nav-next {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-prev:hover,
.nav-next:hover {
    border-color: var(--primary);
    color: var(--primary-light);
}

/* Footer */
.footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid var(--border);
    margin-top: 60px;
}

.footer p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

/* Enhanced Wiki Footer */
.wiki-footer {
    text-align: left;
    padding: 32px 24px 24px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.footer-section h4 {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.footer-links-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
}

.footer-links-inline a {
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.footer-social-icons {
    display: flex;
    gap: 12px;
}

.footer-social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1rem;
    transition: var(--transition);
}

.footer-social-icons a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.footer-bottom-wiki {
    text-align: center;
}

.footer-bottom-wiki p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.footer-bottom-wiki a {
    color: var(--text-secondary);
}

.footer-bottom-wiki a:hover {
    color: var(--primary-light);
}


/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

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

    .sidebar-toggle {
        display: block;
    }

    .content {
        margin-left: 0;
    }

    .article {
        padding: 24px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.25rem;
        margin: 32px 0 16px;
    }

    h3 {
        font-size: 1.1rem;
    }

    .article {
        padding: 20px 16px;
    }

    .lead {
        font-size: 1rem;
    }

    .stats-bar {
        gap: 12px;
        padding: 12px 16px;
        flex-wrap: wrap;
    }

    .stat {
        font-size: 0.85rem;
    }

    .module-card {
        flex-wrap: wrap;
        padding: 14px 16px;
    }

    .module-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .module-card>.fa-chevron-right {
        display: none;
    }

    .page-nav {
        flex-direction: column;
        gap: 12px;
    }

    .nav-prev,
    .nav-next {
        width: 100%;
        justify-content: center;
    }

    /* Tables responsive */
    table {
        font-size: 0.8rem;
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    th,
    td {
        padding: 10px 12px;
    }

    /* Code blocks */
    .code-block pre {
        padding: 12px;
    }

    .code-block code {
        font-size: 0.8rem;
    }

    /* Steps */
    .step {
        gap: 12px;
    }

    .step-number {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }

    /* Callouts */
    .callout {
        padding: 12px;
        gap: 10px;
    }

    .callout i {
        font-size: 1rem;
    }

    /* Links grid */
    .links-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .link-card {
        padding: 16px;
    }

    .link-card i {
        font-size: 1.25rem;
    }

    .link-card span {
        font-size: 0.8rem;
    }

    /* Header mobile */
    .header-right {
        gap: 8px;
    }

    .header-link {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .header-link span {
        display: none;
    }

    .header-link i {
        font-size: 1.1rem;
    }

    /* Footer */
    .footer {
        padding: 24px 16px;
        margin-top: 40px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.15rem;
    }

    .article {
        padding: 16px 12px;
    }

    .breadcrumb {
        font-size: 0.8rem;
        margin-bottom: 16px;
    }

    .stats-bar {
        gap: 8px;
        padding: 10px 12px;
    }

    .stat {
        font-size: 0.8rem;
    }

    .module-card {
        padding: 12px;
    }

    .module-icon {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .module-info h3 {
        font-size: 0.95rem;
    }

    .module-info p {
        font-size: 0.8rem;
    }

    .feature-item {
        font-size: 0.9rem;
    }

    .step-content strong {
        font-size: 0.9rem;
    }

    .step-content span {
        font-size: 0.8rem;
    }

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

    .link-card {
        padding: 12px;
        gap: 6px;
    }

    .link-card i {
        font-size: 1.1rem;
    }

    .link-card span {
        font-size: 0.75rem;
    }

    /* Sidebar overlay */
    .sidebar {
        width: 85%;
        max-width: 300px;
    }

    .sidebar.open::after {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: -1;
    }

    .nav-item {
        padding: 10px 12px 10px 36px;
        font-size: 0.85rem;
    }

    .nav-section-title {
        font-size: 0.8rem;
        padding: 8px 10px;
    }
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}