:root {
    --sans: 'Geist', system-ui, -apple-system, sans-serif;
    --mono: 'Geist Mono', ui-monospace, 'SFMono-Regular', monospace;

    --bg:      #ffffff;
    --fg:      #0a0a0a;
    --fg2:     #333333;
    --fg3:     #666666;
    --border:  #d0d0d0;
    --code-bg: #f0f0f0;
    --green:   #15803d;
    --max-w:   52rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg:      #0f0f0f;
        --fg:      #f0f0f0;
        --fg2:     #c0c0c0;
        --fg3:     #787878;
        --border:  #303030;
        --code-bg: #1c1c1c;
        --green:   #4ade80;
    }
}

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

html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
    font-family: var(--sans);
    font-size: 1rem;
    color: var(--fg);
    background: var(--bg);
    line-height: 1.55;
}

.container { max-width: var(--max-w); margin: 0 auto; padding-inline: 1.25rem; }

/* ---- Typography ---- */

h2 { font-size: 1.125rem; font-weight: 600; margin-bottom: 1rem; color: var(--fg); }
h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.25rem; }

p { color: var(--fg2); margin-bottom: 0.5rem; }

a { color: var(--fg2); text-decoration: none; }
a:hover { color: var(--fg); text-decoration: underline; }

code { font-family: var(--mono); font-size: 0.875rem; }

/* ---- Header ---- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0.6rem 0;
}

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

.logo {
    font-family: var(--mono);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--fg);
}

nav { display: flex; gap: 1.25rem; }
nav a { font-size: 0.9rem; color: var(--fg3); }
nav a:hover { color: var(--fg); text-decoration: none; }

/* ---- Hero ---- */

.hero {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
}

.hero-name {
    font-family: var(--mono);
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--fg);
    margin-bottom: 0.4rem;
}

.hero-tagline {
    font-size: 1.0625rem;
    color: var(--fg2);
    margin-bottom: 0.25rem;
}

.hero-desc {
    font-size: 0.9375rem;
    color: var(--fg3);
    max-width: 38rem;
    margin: 0;
}

/* ---- Terminal ---- */

.terminal {
    background: var(--code-bg);
    border: 1px solid var(--border);
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.terminal code {
    font-size: 0.875rem;
    line-height: 1.65;
    display: block;
    white-space: pre;
    color: var(--fg);
}

.prompt { color: var(--fg3); }
.ok     { color: var(--green); }

/* ---- Demo ---- */

.demo { padding: 1.5rem 0; border-bottom: 1px solid var(--border); }

/* ---- Sections ---- */

.section { padding: 1.5rem 0; border-bottom: 1px solid var(--border); }

/* ---- Install ---- */

.install-grid { display: flex; flex-direction: column; gap: 0.875rem; }
.install-method h3 { font-size: 0.9375rem; margin-bottom: 0.35rem; }

.code {
    background: var(--code-bg);
    border: 1px solid var(--border);
    padding: 0.5rem 0.875rem;
    overflow-x: auto;
}

.code code { font-size: 0.875rem; white-space: pre; color: var(--fg); }

/* ---- Usage ---- */

.usage-grid { display: flex; flex-direction: column; margin-bottom: 1.5rem; }

.usage-row {
    display: grid;
    grid-template-columns: 17rem 1fr;
    gap: 1rem;
    align-items: baseline;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
}

.usage-row:first-child { border-top: 1px solid var(--border); }
.usage-row code  { color: var(--fg); white-space: nowrap; }
.usage-row span  { font-size: 0.9375rem; color: var(--fg2); }

/* ---- Flags ---- */

.flags { display: flex; flex-direction: column; }

.flag {
    display: grid;
    grid-template-columns: 11rem 1fr;
    gap: 1rem;
    align-items: baseline;
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--border);
}

.flag:first-child { border-top: 1px solid var(--border); }
.flag code { color: var(--fg); white-space: nowrap; }
.flag span { font-size: 0.9375rem; color: var(--fg2); }

/* ---- Features ---- */

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem 2rem;
}

.feature h3 { font-size: 1rem; }
.feature p  { font-size: 0.9375rem; line-height: 1.5; margin-bottom: 0; color: var(--fg2); }

/* ---- Examples ---- */

.example { margin-bottom: 1.5rem; }
.example:last-child { margin-bottom: 0; }
.example h3 { font-size: 1rem; margin-bottom: 0.5rem; }

/* ---- Footer ---- */

footer { padding: 1.25rem 0; border-top: 1px solid var(--border); text-align: center; }
footer p { font-size: 0.9rem; color: var(--fg3); margin: 0; }

/* ---- Responsive ---- */

@media (max-width: 640px) {
    .header-content { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
    nav { gap: 0.75rem; }
    .usage-row { grid-template-columns: 1fr; gap: 0.1rem; }
    .flag  { grid-template-columns: 1fr; gap: 0.1rem; }
    .features-grid { grid-template-columns: 1fr; gap: 1rem; }
}