:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --fg: #1c1e21;
  --muted: #6b7280;
  --border: #d8dbe0;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --danger: #b91c1c;
  --ok: #047857;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181d;
    --card: #1f232b;
    --fg: #e6e8eb;
    --muted: #9aa1ad;
    --border: #333a44;
    --accent: #3b82f6;
    --danger: #f87171;
    --ok: #34d399;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  display: flex;
  min-height: 100vh;
  justify-content: center;
  align-items: flex-start;
  padding: 2.5rem 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  width: 100%;
  max-width: 480px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

h1 { font-size: 1.35rem; margin: 0 0 0.25rem; }
h2 { font-size: 1.05rem; margin: 1.25rem 0 0.5rem; }
p.sub { color: var(--muted); margin: 0 0 1.25rem; font-size: 0.9rem; }

label { display: block; font-size: 0.85rem; font-weight: 600; margin: 0.85rem 0 0.3rem; }

input[type="text"],
input[type="password"],
input[type="url"],
input[type="number"],
input[type="file"] {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
  font-size: 0.95rem;
}

input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

button {
  margin-top: 1.25rem;
  width: 100%;
  padding: 0.65rem 1rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--border); }
button:hover { filter: brightness(1.05); }
button:disabled { opacity: 0.6; cursor: not-allowed; }

.row { display: flex; gap: 0.75rem; }
.row > * { flex: 1; }

.seg { display: flex; gap: 0.5rem; margin-bottom: 0.5rem; }
.seg label {
  flex: 1; margin: 0; text-align: center; padding: 0.5rem;
  border: 1px solid var(--border); border-radius: 8px; cursor: pointer; font-weight: 600;
}
.seg input { position: absolute; opacity: 0; }
.seg input:checked + span { color: var(--accent-fg); }
.seg label:has(input:checked) { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }

.msg { padding: 0.65rem 0.8rem; border-radius: 8px; font-size: 0.9rem; margin: 0.75rem 0; }
.msg.error { background: color-mix(in srgb, var(--danger) 15%, transparent); color: var(--danger); }
.msg.ok { background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.hidden { display: none !important; }

.result-url {
  word-break: break-all; font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem; background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 0.6rem; margin-top: 0.5rem;
}

.field-list { list-style: none; padding: 0; margin: 0.5rem 0; }
.field-list li {
  display: flex; justify-content: space-between; align-items: center; gap: 0.75rem;
  border: 1px solid var(--border); border-radius: 8px; padding: 0.55rem 0.7rem; margin-bottom: 0.5rem;
}
.field-list .k { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
.field-list .v { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; word-break: break-all; }
.copy-btn { width: auto; margin: 0; padding: 0.3rem 0.6rem; font-size: 0.8rem; }

.file-item { display: flex; justify-content: space-between; align-items: center; gap: 0.75rem;
  border: 1px solid var(--border); border-radius: 8px; padding: 0.55rem 0.7rem; margin-bottom: 0.5rem; }
.file-item .size { color: var(--muted); font-size: 0.8rem; }
.file-item button { width: auto; margin: 0; padding: 0.35rem 0.7rem; font-size: 0.85rem; }

.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.topbar form { margin: 0; }
.topbar button { width: auto; margin: 0; padding: 0.35rem 0.7rem; font-size: 0.8rem; }
.muted { color: var(--muted); font-size: 0.85rem; }

/* QR-Code: heller Hintergrund für zuverlässige Scanbarkeit, unabhängig vom Theme. */
.qr {
  display: inline-block;
  background: #ffffff;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-top: 0.25rem;
}
.qr svg { display: block; width: 180px; height: 180px; }

/* Druckansicht: nur das geteilte Passwort, ohne Bedienelemente. */
@media print {
  body { display: block; padding: 0; background: #ffffff; color: #000000; }
  .card { max-width: none; border: none; box-shadow: none; padding: 0; }
  .topbar, .no-print, .copy-btn,
  #status-msg, #unlock-section, #decrypt-section, #files-section {
    display: none !important;
  }
  .qr { border: none; padding: 0; }
  .field-list li { border-color: #999999; }
}