:root {
  --accent: #e8b04a;
  --bg: #0f1115;
  --surface: #171a21;
  --line: #2a2f3a;
  --text: #e9ebf0;
  --muted: #9aa2b1;
  --error: #ff6b6b;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); line-height: 1.5; }
.top { padding: 24px max(16px, 5vw); border-bottom: 1px solid var(--line); }
.wordmark { font-size: 1.125rem; font-weight: 600; letter-spacing: .02em; }
.wordmark b { color: var(--accent); font-weight: 600; }
main { max-width: 640px; margin: 0 auto; padding: 64px 16px 80px; }
h1 { font-size: clamp(1.75rem, 5vw, 2.25rem); line-height: 1.15; margin: 0 0 12px; letter-spacing: -.01em; }
.lede { color: var(--muted); margin: 0 0 40px; }
.drop { border: 1.5px dashed var(--line); border-radius: 14px; background: var(--surface);
  padding: 48px 24px; text-align: center; transition: border-color .15s, background .15s; }
.drop.over { border-color: var(--accent); background: #1d1f26; }
.drop.busy { opacity: .6; pointer-events: none; }
.drop-title { margin: 0; font-size: 1.125rem; font-weight: 500; }
.drop-sub { margin: 8px 0 16px; color: var(--muted); font-size: .875rem; }
.btn { display: inline-block; padding: 10px 22px; border-radius: 8px; background: var(--accent);
  color: #15120a; font-weight: 600; cursor: pointer; }
.btn:hover { filter: brightness(1.08); }
.sr { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; }
.sr:focus-visible + .btn, .btn:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; }
.status { min-height: 1.5em; margin: 24px 0 0; color: var(--muted); }
.status.ok { color: var(--accent); }
.status.err { color: var(--error); }
@media (max-width: 480px) { main { padding-top: 40px; } .drop { padding: 36px 16px; } }