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

:root {
    --color-bg: #f8f9fb;
    --color-surface: #ffffff;
    --color-surface-alt: #f1f3f5;
    --color-border: #e1e4e8;
    --color-text: #24292f;
    --color-text-secondary: #57606a;
    --color-text-muted: #8b949e;
    --color-primary: #0969da;
    --color-primary-hover: #0550ae;
    --color-accent: #8250df;
    --color-header-bg: #24292f;
    --color-header-text: #f0f3f6;
    --color-code-bg: #0d1117;
    --color-code-text: #e6edf3;
    --color-tag-bg: #ddf4ff;
    --color-tag-text: #0969da;
    --color-lib-bg: #fbefff;
    --color-lib-text: #8250df;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 3px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    text-decoration: underline;
}

/* ===== Layout ===== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
.main-header {
    background-color: var(--color-header-bg);
    color: var(--color-header-text);
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.main-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.main-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.main-header h1 a {
    color: var(--color-header-text);
    text-decoration: none;
}

.main-header nav {
    display: flex;
    gap: 4px;
}

.main-header nav a {
    color: rgba(240, 243, 246, 0.8);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.15s, background-color 0.15s;
}

.main-header nav a:hover {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
    text-decoration: none;
}

/* ===== Main Content ===== */
main {
    background-color: var(--color-surface);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    margin: 32px auto;
    max-width: 1100px;
}

/* ===== Footer ===== */
footer {
    text-align: center;
    padding: 24px;
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

/* ===== Search ===== */
.search-box {
    margin: 24px 0;
}

.search-box input {
    width: 100%;
    padding: 10px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    background-color: var(--color-surface-alt);
    color: var(--color-text);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.15);
    background-color: var(--color-surface);
}

.search-box input::placeholder {
    color: var(--color-text-muted);
}

#search-results {
    margin-top: 16px;
}

/* ===== Tags & Badges ===== */
.tag {
    display: inline-block;
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    margin: 2px;
    text-decoration: none;
    transition: background-color 0.15s;
    border: 1px solid transparent;
}

.tag:hover {
    background-color: #b6e3ff;
    text-decoration: none;
}

.library-badge {
    display: inline-block;
    background-color: var(--color-lib-bg);
    color: var(--color-lib-text);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    margin: 2px;
}

/* ===== Code Blocks ===== */
pre {
    background-color: var(--color-code-bg);
    color: var(--color-code-text);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    overflow-x: auto;
    margin: 20px 0;
    font-size: 0.875rem;
    line-height: 1.7;
    position: relative;
}

code {
    font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Consolas', monospace;
    font-size: 0.875em;
}

:not(pre) > code {
    background-color: rgba(175, 184, 193, 0.2);
    color: var(--color-text);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
}

pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

/* Copy button */
.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
    opacity: 0;
}

pre:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
}

.copy-btn.copied {
    color: #3fb950;
    border-color: #3fb950;
    opacity: 1;
}

/* ===== Rouge Syntax Highlighting (GitHub-dark inspired) ===== */
.highlight .c,
.highlight .c1,
.highlight .cm,
.highlight .cs { color: #8b949e; font-style: italic; }  /* comments */
.highlight .k,
.highlight .kd,
.highlight .kn,
.highlight .kp,
.highlight .kr,
.highlight .kt { color: #ff7b72; }                       /* keywords */
.highlight .s,
.highlight .s1,
.highlight .s2,
.highlight .sb,
.highlight .sc,
.highlight .sd,
.highlight .se,
.highlight .sh,
.highlight .sx { color: #a5d6ff; }                       /* strings */
.highlight .na { color: #79c0ff; }                        /* attribute names */
.highlight .nb { color: #ffa657; }                        /* builtins */
.highlight .nc { color: #ffa657; }                        /* class names */
.highlight .nf,
.highlight .fm { color: #d2a8ff; }                        /* function names */
.highlight .nn { color: #ffa657; }                        /* module names */
.highlight .ni { color: #c9d1d9; }                        /* entity */
.highlight .no { color: #79c0ff; }                        /* constants */
.highlight .mi,
.highlight .mf,
.highlight .mh,
.highlight .mo { color: #79c0ff; }                        /* numbers */
.highlight .o,
.highlight .ow { color: #ff7b72; }                        /* operators */
.highlight .p { color: #c9d1d9; }                         /* punctuation */
.highlight .bp { color: #79c0ff; }                        /* pseudo builtins */
.highlight .si { color: #a5d6ff; }                        /* string interpolation */
.highlight .sr { color: #7ee787; }                        /* regex */
.highlight .ss { color: #a5d6ff; }                        /* symbols */
.highlight .err { color: #ffa198; }                       /* errors */
.highlight .gd { color: #ffa198; background: rgba(248,81,73,0.15); } /* diff deleted */
.highlight .gi { color: #7ee787; background: rgba(63,185,80,0.15); } /* diff inserted */

/* ===== Homepage ===== */
.homepage h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 8px;
}

.intro {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin: 8px 0 32px 0;
    text-align: center;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.category-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: var(--color-surface);
}

.category-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.category-card h3 {
    margin-bottom: 8px;
    font-size: 1.25rem;
}

.category-card h3 a {
    color: var(--color-text);
    text-decoration: none;
}

.category-card h3 a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.category-card p {
    color: var(--color-text-secondary);
    margin-bottom: 12px;
    font-size: 0.9rem;
    line-height: 1.5;
}

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

.view-category {
    display: inline-block;
    margin-top: 12px;
    padding: 6px 14px;
    background-color: var(--color-surface-alt);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.15s;
    text-decoration: none;
}

.view-category:hover {
    background-color: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    text-decoration: none;
}

/* ===== Category Page ===== */
.category-description {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin: 16px 0 24px 0;
    padding: 16px;
    background-color: var(--color-surface-alt);
    border-left: 3px solid var(--color-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.snippets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.snippet-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: var(--color-surface);
}

.snippet-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.snippet-card h3 {
    margin-bottom: 8px;
}

.snippet-card h3 a {
    color: var(--color-text);
    text-decoration: none;
}

.snippet-card h3 a:hover {
    color: var(--color-primary);
}

.snippet-card p {
    color: var(--color-text-secondary);
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.tags {
    margin: 10px 0;
}

.libraries {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 8px;
}

/* ===== Snippet Page ===== */
.snippet-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.snippet-header h1 {
    color: var(--color-text);
    margin-bottom: 12px;
    font-size: 1.75rem;
    letter-spacing: -0.02em;
}

.snippet-description {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.snippet-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.meta-item {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
}

.meta-item strong {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    margin-right: 4px;
}

.snippet-content {
    margin: 32px 0;
}

.snippet-content h2 {
    color: var(--color-text);
    margin-top: 32px;
    margin-bottom: 16px;
    font-size: 1.35rem;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
}

.snippet-content h3 {
    color: var(--color-text);
    margin-top: 24px;
    margin-bottom: 12px;
    font-size: 1.15rem;
}

.snippet-content p {
    margin-bottom: 16px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.snippet-content ul,
.snippet-content ol {
    margin: 16px 0 16px 24px;
    color: var(--color-text-secondary);
}

.snippet-content li {
    margin-bottom: 6px;
    line-height: 1.7;
}

.snippet-footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}

.back-button {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--color-surface-alt);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s;
    text-decoration: none;
}

.back-button:hover {
    background-color: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    text-decoration: none;
}

/* ===== Tags Page ===== */
.tags-page > p {
    margin: 12px 0 24px 0;
    color: var(--color-text-secondary);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 24px 0;
    padding: 20px;
    background-color: var(--color-surface-alt);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.tag-link {
    display: inline-block;
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    padding: 6px 14px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s;
    border: 1px solid transparent;
}

.tag-link:hover {
    background-color: var(--color-primary);
    color: #fff;
    text-decoration: none;
}

.tag-section {
    margin: 32px 0;
    padding: 24px 0 0 0;
    border-top: 1px solid var(--color-border);
}

.tag-section h2 {
    color: var(--color-text);
    margin-bottom: 16px;
    font-size: 1.35rem;
}

.snippets-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}

.snippet-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    background-color: var(--color-surface);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.snippet-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.snippet-item h3 {
    margin-bottom: 8px;
    font-size: 1.05rem;
}

.snippet-item h3 a {
    color: var(--color-text);
    text-decoration: none;
}

.snippet-item h3 a:hover {
    color: var(--color-primary);
}

.snippet-item p {
    color: var(--color-text-secondary);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

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

.meta-label {
    font-weight: 600;
    color: var(--color-text-secondary);
}

/* ===== Search Results ===== */
.search-results-list {
    margin-top: 12px;
}

.search-result-item {
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    background-color: var(--color-surface);
    transition: border-color 0.15s;
}

.search-result-item:hover {
    border-color: var(--color-primary);
}

.search-result-item h4 {
    margin: 0 0 4px 0;
}

.search-result-item h4 a {
    color: var(--color-text);
    text-decoration: none;
}

.search-result-item h4 a:hover {
    color: var(--color-primary);
}

.search-result-item p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    main {
        padding: 24px 20px;
        margin: 16px 12px;
        border-radius: var(--radius-md);
    }

    .main-header .container {
        flex-direction: column;
        gap: 8px;
    }

    .categories-grid,
    .snippets-grid,
    .snippets-list {
        grid-template-columns: 1fr;
    }

    .homepage h1 {
        font-size: 1.5rem;
    }
}