/* Mechanical Key Gen — base: reset, html/body, typography, utilities */

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

html, body {
    height: 100%;
}

body {
    background: var(--color-bg);
    color: var(--color-on-surface);
    font-family: var(--font-mono);
    font-size: clamp(14px, 1.5vw, 16px);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

h1 { font-size: clamp(1.25rem, 3.5vw, 2rem); }
h2 { font-size: clamp(1rem, 2.5vw, 1.4rem); }

::selection {
    background: var(--color-primary);
    color: #fff;
}

/* ─── Visually hidden (sr-only) ──────────────────────────── */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}