:root {
  --bg: #f7f7f8;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #6b7280;
  --accent: #ff5a5f;
  --accent-dark: #e0484d;
  --border: #e2e4e8;
  --danger: #c62828;
  --ok: #1b7f4b;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121316;
    --card: #1c1e23;
    --text: #eceef1;
    --muted: #9aa0a9;
    --border: #2c2f36;
    --danger: #ff6b6b;
    --ok: #4cc38a;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.hidden { display: none !important; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(12px + env(safe-area-inset-top)) 16px 12px;
  background: var(--accent); color: #fff;
}
.topbar h1 { margin: 0; font-size: 1.1rem; }
.topbar .link { color: #fff; }

main { max-width: 560px; margin: 0 auto; padding: 16px 16px calc(32px + env(safe-area-inset-bottom)); }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; margin-bottom: 14px; }
.card h2 { margin: 0 0 8px; font-size: 1.05rem; }

label { display: block; margin: 12px 0 4px; font-size: .85rem; color: var(--muted); }
input, select {
  width: 100%; padding: 12px; font-size: 1rem; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
}
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.row { display: flex; gap: 10px; }
.row > * { flex: 1; min-width: 0; }
.code-row { align-items: stretch; }
.code-row input { font-size: 1.3rem; letter-spacing: .15em; font-variant-numeric: tabular-nums; }
.code-row button { flex: 0 0 auto; }

button { font: inherit; cursor: pointer; border-radius: 10px; border: 0; padding: 12px 16px; }
button.primary { width: 100%; margin-top: 16px; background: var(--accent); color: #fff; font-weight: 600; }
button.primary:active { background: var(--accent-dark); }
button.primary:disabled { opacity: .6; }
button.secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
button.link { background: none; color: var(--accent); padding: 8px 0; text-decoration: underline; }

.tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.tab { flex: 1; background: var(--card); color: var(--muted); border: 1px solid var(--border); }
.tab.active { color: var(--text); border-color: var(--accent); font-weight: 600; }

.chips { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.chips button { flex: 1; min-width: 56px; padding: 8px 10px; font-size: .9rem; background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.chips button:active { border-color: var(--accent); }

.summary { display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; margin: 8px 0 12px; }
.summary dt { color: var(--muted); font-size: .9rem; }
.summary dd { margin: 0; text-align: right; font-weight: 600; overflow-wrap: anywhere; }
.summary dd.code { font-size: 1.5rem; letter-spacing: .12em; font-variant-numeric: tabular-nums; }

.hint { margin: 0 0 10px; color: var(--muted); font-size: .9rem; }
.note { background: rgba(255, 170, 0, .15); border-radius: 10px; padding: 10px 12px; font-size: .9rem; white-space: pre-line; }
.status { min-height: 1.4em; margin: 10px 0 0; font-size: .92rem; color: var(--muted); }
.status.error { color: var(--danger); }
.status.ok { color: var(--ok); }

.preview { display: block; width: 100%; max-height: 260px; object-fit: contain; margin-top: 12px; border-radius: 10px; border: 1px solid var(--border); }

.big-code { font-size: 2.6rem; font-weight: 700; letter-spacing: .12em; text-align: center; padding: 10px 0; font-variant-numeric: tabular-nums; }
.result .row { margin-top: 8px; }

.codes { list-style: none; margin: 12px 0 0; padding: 0; }
.codes li { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 0; border-top: 1px solid var(--border); }
.codes .info { min-width: 0; }
.codes .pwd { font-weight: 700; letter-spacing: .1em; font-variant-numeric: tabular-nums; }
.codes .meta { color: var(--muted); font-size: .85rem; overflow-wrap: anywhere; }
.codes button { background: none; color: var(--danger); border: 1px solid var(--border); padding: 8px 12px; }