:root {
  --bg: #f5f7f6; --fg: #17201e; --muted: #64706d; --card: #ffffff; --line: #dde3e1;
  --accent: #0f766e; --accent-fg: #ffffff; --danger: #b42318;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1514; --fg: #e6ecea; --muted: #94a3a0; --card: #18211f; --line: #2a3533; --accent: #2dd4bf; --accent-fg: #062a26; --danger: #f97066; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); }
.top { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; padding-top: max(12px, env(safe-area-inset-top)); border-bottom: 1px solid var(--line); background: var(--card); }
.brand { font-weight: 700; font-size: 1.15rem; text-decoration: none; color: var(--fg); }
main { max-width: 900px; margin: 0 auto; padding: 16px; }
footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 24px 16px; }
h1 { font-size: 1.5rem; margin: 8px 0 16px; }
.tiles { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.tile { display: flex; flex-direction: column; gap: 4px; padding: 16px; min-height: 120px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: var(--fg); }
.tile:hover, .tile:focus-visible { border-color: var(--accent); }
.tile .icon { font-size: 1.8rem; }
.tile .name { font-weight: 600; }
.tile .ext, .tile .desc, .muted, .meta { color: var(--muted); font-size: .85rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.narrow { max-width: 380px; margin: 32px auto; }
.stack { display: flex; flex-direction: column; gap: 12px; margin-bottom: 16px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: .9rem; }
input, textarea { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--fg); width: 100%; }
button { font: inherit; padding: 10px 16px; border: 0; border-radius: 10px; background: var(--accent); color: var(--accent-fg); font-weight: 600; cursor: pointer; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.link { background: none; color: var(--accent); padding: 4px 8px; font-weight: 500; }
button.danger { color: var(--danger); }
.error { color: var(--danger); }
pre { background: var(--bg); padding: 8px; border-radius: 8px; overflow-x: auto; font-size: .85rem; }
.list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.note { white-space: pre-wrap; }
.meta { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; }
.meta form { margin: 0; }