:root {
    --primary-color: #005ce6;
    --primary-hover: #004ecc;
    --bg-color: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --sidebar-bg: #f8f9fa;
    --sidebar-border: #e9ecef;
    --code-bg: #f1f3f5;
    --code-text: #e83e8c;
    --nav-bg: #ffffff;
    --nav-border: #e9ecef;
    --header-text: #111111;
    --item-hover: #e9ecef;
    --active-item: #e6f0ff;
    --active-item-text: #005ce6;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'Fira Code', source-code-pro, Menlo, Monaco, Consolas, "Courier New", monospace;
}

[data-theme='dark'] {
    --primary-color: #4da6ff;
    --primary-hover: #80bfff;
    --bg-color: #1a1b1e;
    --text-color: #c9d1d9;
    --text-muted: #8b949e;
    --sidebar-bg: #141517;
    --sidebar-border: #2c2f33;
    --code-bg: #2c2f33;
    --code-text: #ff7b72;
    --nav-bg: #1a1b1e;
    --nav-border: #2c2f33;
    --header-text: #ffffff;
    --item-hover: #2c2f33;
    --active-item: #1f3a5e;
    --active-item-text: #4da6ff;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--nav-border);
    display: flex;
    align-items: center;
    padding: 0 2rem;
    z-index: 100;
    transition: background-color 0.3s, border-color 0.3s;
    box-shadow: var(--shadow-sm);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--header-text);
    text-decoration: none;
    margin-right: auto;
}

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

.nav-links {
    display: flex;
    gap: 1.5rem;
    margin-right: 1.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.author-name {
    font-weight: 600;
    margin-right: 1.5rem;
    color: var(--text-color);
    font-size: 0.95rem;
    white-space: nowrap;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.theme-toggle:hover {
    background-color: var(--item-hover);
}

.lang-select {
    padding: 0.3rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--sidebar-border);
    background-color: var(--nav-bg);
    color: var(--text-color);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    cursor: pointer;
    margin-right: 0.5rem;
    outline: none;
    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

.lang-select:hover {
    border-color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    margin-left: 1rem;
}

/* Layout */
.layout {
    display: flex;
    margin-top: 60px;
    min-height: calc(100vh - 60px);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    position: fixed;
    top: 60px;
    bottom: 0;
    left: 0;
    overflow-y: auto;
    padding: 2rem 1.5rem;
    transition: background-color 0.3s, border-color 0.3s, transform 0.3s;
    z-index: 90;
}

.sidebar-group {
    margin-bottom: 2rem;
}

.sidebar-group h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.sidebar-group ul {
    list-style: none;
}

.sidebar-group li {
    margin-bottom: 0.25rem;
}

.sidebar-group a {
    display: block;
    padding: 0.4rem 0.75rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.sidebar-group a:hover {
    background-color: var(--item-hover);
    color: var(--primary-color);
}

.sidebar-group a.active {
    background-color: var(--active-item);
    color: var(--active-item-text);
    font-weight: 500;
}

/* Main Content */
.content-area {
    margin-left: 280px;
    flex: 1;
    padding: 3rem 4rem;
    max-width: 1000px;
}

.content {
    animation: fadeIn 0.4s ease-out;
}

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

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

/* Markdown Styling Simulation */
.content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--header-text);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--sidebar-border);
}

.content h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--header-text);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--header-text);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.content p {
    margin-bottom: 1.2rem;
    color: var(--text-color);
}

.content ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.content li {
    margin-bottom: 0.4rem;
}

.content code {
    font-family: var(--font-mono);
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

.content pre {
    background-color: var(--code-bg);
    padding: 1.25rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.content pre code {
    background-color: transparent;
    color: var(--text-color);
    padding: 0;
    font-size: 0.9em;
}

/* Tables for Parameters */
.params-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    display: block;
    overflow-x: auto;
    white-space: nowrap;
}

.params-table th,
.params-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--sidebar-border);
    text-align: left;
}

.params-table th {
    font-weight: 600;
    color: var(--header-text);
    background-color: var(--item-hover);
}

.params-table td:first-child {
    font-family: var(--font-mono);
    color: var(--primary-color);
    font-weight: 500;
    width: 20%;
}

.params-table td:nth-child(2) {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: 0.9em;
    width: 20%;
}

.method-block {
    background-color: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.method-block h4 {
    font-family: var(--font-mono);
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

/* Callouts */
.callout {
    padding: 1rem 1.25rem;
    border-left: 4px solid var(--primary-color);
    background-color: var(--active-item);
    border-radius: 4px;
    margin-bottom: 1.5rem;
}

.callout p {
    margin-bottom: 0;
}

/* Responsive */
@media (max-width: 900px) {
    .content-area {
        padding: 2rem;
    }

    .author-name {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .sidebar {
        transform: translateX(-100%);
        width: 260px;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-md);
    }

    .content-area {
        margin-left: 0;
        padding: 1.5rem;
        max-width: 100vw;
        overflow-x: hidden;
    }

    .mobile-menu-btn {
        display: block;
        padding: 0.5rem;
    }

    .layout {
        flex-direction: column;
    }
}

/* Mouse Particles */
.mouse-particle {
    position: absolute;
    pointer-events: none;
    border-radius: 50%;
    z-index: 9999;
    animation: particle-anim 1s ease-out forwards;
}

@keyframes particle-anim {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(var(--tx), var(--ty)) scale(0);
        opacity: 0;
    }
}