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

body {
    background: #0a0a0a;
    color: #ffffff;
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
    min-height: 100vh;
    padding: 4rem 2rem;
    line-height: 1.6;
}

.container {
    max-width: 680px;
    width: 100%;
    margin: 0 auto;
}

a {
    color: #666;
    text-decoration: none;
    transition: all 0.2s;
}

a:hover {
    color: #999;
}

/* Typography */
h1 {
    font-size: 32px;
    margin-bottom: 1rem;
    font-weight: 400;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 20px;
    font-weight: 500;
    margin: 3rem 0 1.5rem;
    padding-top: 2rem;
    border-top: 1px solid #222;
    letter-spacing: -0.01em;
}

h2:first-of-type {
    border-top: none;
    margin-top: 2rem;
}

h3 {
    font-size: 16px;
    font-weight: 500;
    margin: 2rem 0 1rem;
    color: #999;
    letter-spacing: 0.02em;
}

p {
    color: #999;
    margin-bottom: 1rem;
    font-size: 14px;
}

ul {
    list-style: none;
    margin: 1rem 0;
    padding-left: 0;
}

li {
    color: #888;
    margin: 0.5rem 0;
    padding-left: 1rem;
    position: relative;
    font-size: 14px;
}

li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: #444;
}

/* Intro */
.intro {
    margin: 1rem 0 3rem;
}

.intro p {
    font-size: 14px;
    color: #888;
    line-height: 1.5;
}

/* Navigation */
nav {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #222;
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

nav a {
    color: #666;
    text-decoration: none;
    font-size: 12px;
    transition: all 0.2s;
    padding: 0.5rem 1rem;
    border: 1px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
}

nav a:hover {
    color: #999;
    border-color: #222;
}

nav a.active {
    color: #fff;
    border-color: #444;
    background: #0f0f0f;
}

/* Code blocks */
pre {
    background: #0f0f0f;
    border: 1px solid #222;
    padding: 1rem;
    overflow-x: auto;
    margin: 1rem 0;
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
    font-size: 12px;
    line-height: 1.6;
    -webkit-overflow-scrolling: touch;
}

code {
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
    font-size: 12px;
    color: #ccc;
}

/* Example container */
.example {
    margin: 2rem 0;
}

.try-label {
    font-size: 12px;
    color: #666;
    margin-bottom: 0.75rem;
}

.example-header {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.copy-lang-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid #222;
    color: #666;
    cursor: pointer;
    font-size: 12px;
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
    transition: all 0.2s;
}

.copy-lang-btn:hover {
    border-color: #444;
    color: #999;
}

.copy-lang-btn:active {
    transform: translateY(1px);
}

.copy-lang-btn.copied {
    color: #fff;
    border-color: #fff;
}

.execute-btn {
    padding: 0.5rem 1rem;
    background: #fff;
    border: 1px solid #fff;
    color: #0a0a0a;
    cursor: pointer;
    font-size: 12px;
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
    transition: all 0.2s;
    font-weight: 500;
}

.execute-btn:hover {
    background: #ccc;
    border-color: #ccc;
}

.execute-btn:active {
    transform: translateY(1px);
}

/* Output */
.output {
    margin-top: 1rem;
    padding: 1rem;
    background: #1e1e1e;
    color: #ffffff;
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
    font-size: 12px;
    border: 1px solid #222;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-x: auto;
    display: block;
    min-height: 100px;
    -webkit-overflow-scrolling: touch;
}

.output:empty::before {
    content: '';
    display: block;
}

/* Visual demo blocks */
.demo-box {
    background: #0f0f0f;
    border: 1px solid #222;
    padding: 1rem;
    margin: 1rem 0;
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
    font-size: 12px;
    white-space: pre;
    color: #ccc;
}

/* Copy button */
.copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.25rem 0.75rem;
    background: #0a0a0a;
    border: 1px solid #222;
    font-size: 11px;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s;
    color: #666;
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
}

.code-block:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    border-color: #444;
    color: #fff;
}

/* Sections as tabs */
section {
    display: none;
}

section.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

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

/* Footer */
footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid #222;
    text-align: center;
    color: #444;
    font-size: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 2rem 1.5rem;
    }

    h1 {
        font-size: 24px;
    }

    h2 {
        font-size: 18px;
        margin: 2rem 0 1rem;
        padding-top: 1.5rem;
    }

    .intro {
        margin: 1rem 0 2rem;
    }

    .example-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .copy-lang-btn,
    .execute-btn {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .container {
        max-width: 100%;
    }

    .demo-box {
        font-size: 11px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .output {
        font-size: 11px;
    }

    .example {
        margin: 1.5rem 0;
    }
}

@media (max-width: 480px) {
    body {
        padding: 1.5rem 1rem;
    }

    h1 {
        font-size: 20px;
        margin-bottom: 0.75rem;
    }

    h2 {
        font-size: 16px;
        margin: 1.5rem 0 1rem;
        padding-top: 1rem;
    }

    h3 {
        font-size: 14px;
        margin: 1.5rem 0 0.75rem;
    }

    p, li {
        font-size: 13px;
    }

    nav {
        margin-bottom: 1.5rem;
        padding-bottom: 0.75rem;
        gap: 0.25rem;
    }

    nav a {
        font-size: 11px;
        padding: 0.4rem 0.75rem;
    }

    .demo-box {
        padding: 0.75rem;
        font-size: 10px;
    }

    .output {
        padding: 0.75rem;
        font-size: 10px;
        min-height: 80px;
    }

    .try-label {
        font-size: 11px;
        margin-bottom: 0.5rem;
    }

    .copy-lang-btn,
    .execute-btn {
        font-size: 11px;
        padding: 0.5rem 0.75rem;
    }

    ul {
        margin: 0.75rem 0;
    }

    li {
        margin: 0.4rem 0;
        padding-left: 0.75rem;
    }

    footer {
        margin-top: 3rem;
        padding-top: 1.5rem;
        font-size: 11px;
    }
}

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

::-webkit-scrollbar-track {
    background: #0a0a0a;
}

::-webkit-scrollbar-thumb {
    background: #222;
}

::-webkit-scrollbar-thumb:hover {
    background: #333;
}