:root {
  --bg: #f4f5f7; --card: #ffffff; --ink: #14161a; --muted: #5d6470; --line: #d9dde3;
  --accent: #0b6e4f; --accent-ink: #ffffff; --danger: #b3261e; --code: #eef1f4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101214; --card: #1a1d21; --ink: #eceef1; --muted: #9aa3ae; --line: #2c3138;
    --accent: #37b98a; --accent-ink: #06231a; --danger: #ff8a80; --code: #23272d;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.top { max-width: 680px; margin: 0 auto; padding: 20px 16px 4px; }
.top h1 { margin: 0; font-size: 1.5rem; letter-spacing: -0.02em; }
.tag { margin: 2px 0 0; color: var(--muted); font-size: 0.9rem; }
main { max-width: 680px; margin: 0 auto; padding: 12px 16px 48px; display: grid; gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.card h2 { margin: 0 0 10px; font-size: 1.05rem; }
.muted { color: var(--muted); font-size: 0.9rem; }
.error { color: var(--danger); }
p { margin: 0 0 10px; }
label { display: block; font-size: 0.85rem; color: var(--muted); margin: 8px 0 4px; }
input[type=text], input[type=password], textarea {
  width: 100%; padding: 11px 12px; font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px;
}
textarea { min-height: 96px; resize: vertical; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 0.9rem; }
input:focus-visible, textarea:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button {
  font: inherit; font-weight: 600; padding: 10px 14px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--ink); min-height: 44px;
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.big { width: 100%; padding: 16px; font-size: 1.1rem; }
button.danger { color: var(--danger); }
button.small { min-height: 36px; padding: 6px 10px; font-size: 0.85rem; }
button:disabled { opacity: 0.55; cursor: default; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.grow { flex: 1 1 auto; min-width: 0; }
.mt { margin-top: 12px; }
.cred { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; margin-bottom: 8px; }
.cred code, .mono {
  font-family: ui-monospace, Menlo, Consolas, monospace; background: var(--code); padding: 9px 10px;
  border-radius: 8px; overflow-wrap: anywhere; font-size: 0.95rem;
}
.countdown { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 1.25rem; }
.dropzone {
  border: 2px dashed var(--line); border-radius: 12px; padding: 22px 12px; text-align: center; color: var(--muted);
}
.dropzone.over { border-color: var(--accent); color: var(--ink); }
.dropzone input { display: none; }
ul.items { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
ul.items li { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.name { font-weight: 600; overflow-wrap: anywhere; }
pre.text {
  margin: 8px 0; padding: 10px; background: var(--code); border-radius: 8px; white-space: pre-wrap;
  overflow-wrap: anywhere; max-height: 260px; overflow: auto; font-size: 0.88rem;
}
progress { width: 100%; height: 8px; margin-top: 8px; accent-color: var(--accent); }
#toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); max-width: calc(100vw - 32px);
  background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 999px; font-size: 0.9rem; z-index: 10;
}
details summary { cursor: pointer; color: var(--muted); font-size: 0.9rem; }