:root {
  --bg: #f6f5f2;
  --card: #ffffff;
  --ink: #1d1d1f;
  --muted: #6b6b70;
  --line: #dddbd5;
  --accent: #2f6fde;
  --accent-ink: #ffffff;
  --ok: #1f8a4c;
  --bad: #c0392b;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171a;
    --card: #222226;
    --ink: #ececef;
    --muted: #9a9aa2;
    --line: #38383e;
    --accent: #5b8ef0;
    --ok: #4cc27f;
    --bad: #ef6a5b;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  padding: 0 16px;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

header, main, footer { max-width: 760px; margin: 0 auto; }

header { padding: 32px 0 16px; }
.logo { font-size: 1.6rem; font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: -0.02em; }
.tagline { margin: 4px 0 0; color: var(--muted); }

footer { padding: 32px 0; color: var(--muted); font-size: 0.85rem; }

#home { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { #home { grid-template-columns: 1fr; } }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
}
.card h2 { margin: 0 0 12px; font-size: 1.1rem; }

#drop {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 4px; min-height: 120px; padding: 16px; text-align: center;
  border: 2px dashed var(--line); border-radius: 10px; cursor: pointer;
}
#drop span { color: var(--muted); font-size: 0.9rem; }
#drop:hover, #drop:focus, body.dragging #drop { border-color: var(--accent); outline: none; }

.or { text-align: center; color: var(--muted); margin: 10px 0; font-size: 0.9rem; }

textarea, input {
  width: 100%; padding: 10px; font: inherit; color: inherit;
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
}
textarea { resize: vertical; }
#code { font-family: ui-monospace, Menlo, Consolas, monospace; text-transform: uppercase; letter-spacing: 0.05em; }

button, .button {
  display: inline-block; margin-top: 10px; padding: 10px 18px;
  font: inherit; font-weight: 600; text-decoration: none;
  color: var(--accent-ink); background: var(--accent);
  border: 0; border-radius: 8px; cursor: pointer;
}
button:disabled { opacity: 0.45; cursor: default; }
button.secondary { background: transparent; color: var(--ink); border: 1px solid var(--line); }
button.link { background: none; color: var(--accent); padding: 4px 0; font-weight: 500; }

.hint { color: var(--muted); font-size: 0.9rem; margin: 10px 0 0; }
.buttons { display: flex; gap: 10px; }

.item { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.item .name { font-weight: 600; overflow-wrap: anywhere; }
.item .size { color: var(--muted); white-space: nowrap; }

.label { margin: 20px 0 4px; color: var(--muted); }
.code {
  font: 700 clamp(1.4rem, 6vw, 2.2rem)/1.2 ui-monospace, Menlo, Consolas, monospace;
  letter-spacing: 0.04em; overflow-wrap: anywhere;
}
#qr { width: 180px; max-width: 100%; margin: 12px 0 0; background: #fff; padding: 6px; border-radius: 6px; }
#qr svg { display: block; width: 100%; height: auto; }

.status { margin: 16px 0 0; font-weight: 500; }
.status.ok { color: var(--ok); }
.status small { display: block; font-weight: 400; color: var(--muted); }
.path { margin: 2px 0 0; color: var(--muted); font-size: 0.9rem; }
.path:empty { display: none; }

.transfer { margin-top: 12px; }
progress { width: 100%; height: 12px; accent-color: var(--accent); }
.meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; }

.keep { color: var(--muted); font-size: 0.9rem; margin: 16px 0 0; }

#r-text, #r-save { margin-top: 16px; }

.error h2 { color: var(--bad); }
.error ul { padding-left: 1.2em; }