:root {
    --bg: #0d1117;
    --bg-surface: #161b22;
    --bg-code: #1c2128;
    --border: #30363d;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --green: #3fb950;
    --yellow: #d29922;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', 'JetBrains Mono', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

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

html {
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent);
    text-decoration: none;
}
a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Header */
header {
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
}
header nav {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    align-items: baseline;
    gap: 1.5rem;
    flex-wrap: wrap;
}
.logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}
.logo:hover {
    color: var(--accent);
    text-decoration: none;
}
.tagline {
    flex: 1;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Nav Dropdown */
.nav-dropdown {
    position: relative;
}
.nav-dropdown summary {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-family: var(--font-mono);
    list-style: none;
    user-select: none;
}
.nav-dropdown summary::-webkit-details-marker {
    display: none;
}
.nav-dropdown summary::after {
    content: " \25BE";
    font-size: 0.75rem;
}
.nav-dropdown details[open] summary::after {
    content: " \25B4";
}
.nav-dropdown summary:hover {
    color: var(--accent);
}
.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem 0;
    min-width: 200px;
    z-index: 100;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
.dropdown-menu a {
    display: block;
    padding: 0.35rem 1rem;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    color: var(--text);
}
.dropdown-menu a:hover {
    color: var(--accent);
    background: var(--bg-code);
    text-decoration: none;
}

/* Main */
main {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
    flex: 1;
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Hero */
.hero {
    text-align: center;
    padding: 3rem 0 2rem;
}
.hero h1 {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}
.hero-sub {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}
.philosophy {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    max-width: 800px;
    margin: 0 auto;
}
.phil-item {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem;
    text-align: left;
}
.phil-item strong {
    display: block;
    color: var(--accent);
    margin-bottom: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
}
.phil-item span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Tools Grid */
.tools-grid {
    padding-top: 2rem;
}
.category {
    margin-bottom: 2rem;
}
.category h2 {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    font-family: var(--font-mono);
    font-weight: 500;
}
.tool-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 0.75rem;
}
.tool-card {
    display: block;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.25rem;
    color: var(--text);
    transition: border-color 0.15s;
}
.tool-card:hover {
    border-color: var(--accent);
    text-decoration: none;
}
.tool-card h3 {
    font-family: var(--font-mono);
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--accent);
}
.tool-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

/* Tool Detail Page */
.tool-detail {
    max-width: 800px;
}
.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}
.tool-header h1 {
    font-family: var(--font-mono);
    font-size: 2rem;
}
.tool-tagline {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-top: 0.25rem;
}
.tool-meta {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.badge {
    display: inline-block;
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.2rem 0.6rem;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}
.badge-link {
    color: var(--accent);
}
.badge-link:hover {
    background: var(--accent);
    color: var(--bg);
    text-decoration: none;
}
.tool-desc {
    font-size: 1rem;
    margin-bottom: 2rem;
    line-height: 1.7;
}

/* Sections */
.tool-detail section {
    margin-bottom: 2.5rem;
}
.tool-detail h2 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text);
}
.tool-detail h3 {
    font-size: 1rem;
    margin: 1rem 0 0.5rem;
    color: var(--green);
    font-family: var(--font-mono);
}

/* Features list */
.features ul {
    list-style: none;
    padding: 0;
}
.features li {
    padding: 0.35rem 0;
    padding-left: 1.25rem;
    position: relative;
    color: var(--text-muted);
}
.features li::before {
    content: "\2022";
    color: var(--accent);
    position: absolute;
    left: 0;
}

/* Code blocks */
pre {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.25rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.5;
    margin: 0.5rem 0;
    white-space: pre-wrap;
    word-break: break-word;
}
pre code {
    font-family: inherit;
    font-size: inherit;
    background: none;
    border: none;
    padding: 0;
}
pre.command {
    background: var(--bg);
    border: 1px solid var(--green);
    border-left: 3px solid var(--green);
    overflow: visible;
}
pre.command code {
    color: var(--green);
}

/* Install */
.install pre {
    background: var(--bg);
    border: 1px solid var(--accent);
    border-left: 3px solid var(--accent);
    overflow: visible;
}

/* Comparison table */
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
thead {
    background: var(--bg-code);
}
th, td {
    padding: 0.6rem 1rem;
    text-align: left;
    border: 1px solid var(--border);
}
th {
    font-family: var(--font-mono);
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
td strong {
    color: var(--green);
}

/* Tool nav */
.tool-nav {
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 640px) {
    main { padding: 1rem; }
    .hero h1 { font-size: 1.75rem; }
    .tool-header { flex-direction: column; }
    .tool-header h1 { font-size: 1.5rem; }
    .philosophy { grid-template-columns: 1fr; }
    .tool-cards { grid-template-columns: 1fr; }
    pre { font-size: 0.75rem; padding: 0.75rem; }
}