/* Base layout, typography, resets. Theme colors live in themes.css. */

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

html, body { height: 100%; }

html { color-scheme: light dark; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell,
        "Noto Sans", Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

/* Accessible skip link — visible only on focus. */
.skip-link {
    position: absolute;
    top: -100px;
    left: 8px;
    background: var(--accent);
    color: var(--accent-text);
    padding: 8px 12px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    z-index: 1000;
}
.skip-link:focus { top: 8px; }

header[role="banner"] {
    padding: 16px;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, var(--bg-soft), var(--bg) 70%);
}

.header-inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.header-text { flex: 1 1 auto; min-width: 0; }

h1 {
    margin: 0 0 6px;
    font-size: clamp(20px, 3.2vw, 28px);
    font-weight: 800;
    color: var(--accent);
}

.sub { color: var(--muted); font-size: 14px; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 16px; }

.grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(12, 1fr);
    align-items: start;
}

main { display: block; }

.footer {
    padding: 14px;
    text-align: center;
    color: var(--muted);
    font-size: 12px;
}

a { color: var(--link); }
a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

.hidden { display: none !important; }

.mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
        "Liberation Mono", "Courier New", monospace;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
    }
}