@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --bg-color: #0d1117;
    --sidebar-bg: rgba(22, 27, 34, 0.85);
    --card-bg: #161b22;
    --card-hover-bg: #1f262e;

    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;

    --accent-color: #58a6ff;
    --accent-secondary: #238636;
    --accent-glow: rgba(88, 166, 255, 0.15);

    --border-color: #30363d;
    --border-color-light: #3d444d;

    --code-bg: #0d1117;
    --code-header: #1f2428;

    --scrollbar-track: #0d1117;
    --scrollbar-thumb: #30363d;

    --nav-height: 60px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(at 0% 0%, rgba(88, 166, 255, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(35, 134, 54, 0.05) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 320px;
    background: var(--sidebar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px;
    height: 100vh;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.02em;
}

.logo img {
    height: 32px;
    filter: drop-shadow(0 0 8px rgba(88, 166, 255, 0.3));
}

.search-container {
    margin-bottom: 24px;
    position: relative;
}

#search-input {
    width: 100%;
    padding: 12px 16px;
    padding-left: 40px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    outline: none;
    transition: all 0.2s ease;
}

#search-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: var(--bg-color);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    font-size: 0.9rem;
}

.nav-links {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-right: 4px;
}

.nav-group {
    margin-bottom: 2px;
}

.nav-category {
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    border: 1px solid transparent;
}

.nav-category:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.nav-category.expanded {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.subcategory-list {
    display: none;
    flex-direction: column;
    margin-top: 4px;
    margin-bottom: 8px;
    padding-left: 14px;
    border-left: 1px solid var(--border-color);
    margin-left: 12px;
    animation: slideDown 0.2s ease-out;
}

.subcategory-item {
    padding: 8px 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s;
    position: relative;
}

.subcategory-item:hover {
    color: var(--accent-color);
    background: rgba(88, 166, 255, 0.05);
}

.subcategory-item.active {
    color: var(--accent-color);
    background: rgba(88, 166, 255, 0.1);
    font-weight: 500;
}

.subcategory-item.active::before {
    content: '';
    position: absolute;
    left: -15px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 70%;
    background: var(--accent-color);
    border-radius: 0 4px 4px 0;
}

.nav-category.expanded+.subcategory-list {
    display: flex;
}

.chevron {
    transition: transform 0.2s ease;
    font-size: 1.8rem;
    opacity: 0.8;
}

.nav-category.expanded .chevron {
    transform: rotate(90deg);
}

.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 40px 60px;
    position: relative;
    scroll-behavior: smooth;
    max-width: 1200px;
    margin: 0 auto;
}

header {
    margin-bottom: 48px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #fff 0%, #aaa 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
}

.section-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title::before {
    content: '#';
    color: var(--accent-color);
    opacity: 0.6;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    margin-bottom: 32px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--border-color-light);
    transform: translateY(-1px);
    box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.3);
}

.card h3,
.card h4,
.card h5 {
    margin-bottom: 16px;
    color: var(--text-primary);
    font-weight: 600;
    margin-top: 8px;
}

.card h3 {
    font-size: 1.25rem;
    color: var(--accent-color);
}

.card h4 {
    font-size: 1.1rem;
}

.markdown-content p {
    margin-bottom: 16px;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

.markdown-content ul,
.markdown-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
    color: var(--text-secondary);
}

.markdown-content li {
    margin-bottom: 8px;
}

.markdown-content a {
    color: var(--accent-color);
    text-decoration: none;
    border-bottom: 1px solid rgba(88, 166, 255, 0.3);
    transition: border-color 0.2s;
}

.markdown-content a:hover {
    border-bottom-color: var(--accent-color);
}

pre {
    background: var(--code-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    position: relative;
    margin: 20px 0;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.2);
}

pre code {
    display: block;
    padding: 20px;
    padding-top: 40px;
    overflow-x: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: #e6edf3;
    line-height: 1.5;
}

.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.75rem;
    font-family: 'Outfit', sans-serif;
    transition: all 0.2s;
    opacity: 0;
    transform: translateY(2px);
}

pre:hover .copy-btn {
    opacity: 1;
    transform: translateY(0);
}

.copy-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

.table-container {
    overflow-x: auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin: 20px 0;
    background: var(--card-bg);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

th {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-primary);
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #48525d;
}

#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 16px rgba(88, 166, 255, 0.3);
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: center;
}

#back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

#back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 20px rgba(88, 166, 255, 0.4);
}

.menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.card,
.section-title {
    animation: fadeIn 0.4s ease-out backwards;
}

.card:nth-child(2) {
    animation-delay: 0.1s;
}

.card:nth-child(3) {
    animation-delay: 0.15s;
}

.card:nth-child(4) {
    animation-delay: 0.2s;
}

.card:nth-child(5) {
    animation-delay: 0.25s;
}

@media (max-width: 900px) {
    .main-content {
        padding: 30px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        transform: translateX(-100%);
        width: 85%;
        box-shadow: 20px 0 50px rgba(0, 0, 0, 0.5);
    }

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

    .menu-toggle {
        display: block;
    }

    .main-content {
        padding: 24px 20px;
    }

    header h1 {
        font-size: 2rem;
    }
}