* { box-sizing: border-box; }
html { color-scheme: light; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
button, input, select, textarea { font: inherit; }
a { color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(1.9rem, 4vw, 3rem); line-height: 1.08; letter-spacing: -.035em; }
h2 { font-size: 1.15rem; line-height: 1.3; }
:focus-visible { outline: none; box-shadow: var(--focus-ring); }
[hidden] { display: none !important; }
.error-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.error-card { width: min(520px, 100%); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 32px; }