:root {
  --bg: #F4F6F7; --card: #FFF; --ink: #16221F; --ink-2: #4B5B57; --ink-3: #7E8F8A;
  --line: #DBE4E1; --key: #0E6B62; --key-ink: #FFF; --ok: #2C6E49; --ok-bg: #E4F1E9;
  --bad: #93362B; --bad-bg: #F8E6E2; --radius: 8px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0D1413; --card: #16201E; --ink: #E3EAE8; --ink-2: #A4B4B0; --ink-3: #74857F;
    --line: #26332F; --key: #5FC0B2; --key-ink: #0B1413; --ok: #6FBF92; --ok-bg: #12271B;
    --bad: #E29184; --bad-bg: #2E1815;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Pretendard", -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  font-size: 16px; line-height: 1.7;
}
.bar { background: var(--card); border-bottom: 1px solid var(--line); }
.bar .in { max-width: 40rem; margin: 0 auto; padding: .8rem 1rem; display: flex; justify-content: space-between; align-items: baseline; }
.muted { color: var(--ink-3); font-size: .8rem; font-family: ui-monospace, monospace; }
.wrap { max-width: 40rem; margin: 0 auto; padding: 1.25rem 1rem 3rem; display: flex; flex-direction: column; gap: 1rem; }
.banner { margin: 0; padding: .8rem 1rem; border-radius: var(--radius); background: #3B2E12; color: #F5E4B8; font-size: .9rem; }
.banner strong { color: #FFD873; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem; }
.card.ok { border-color: var(--ok); background: var(--ok-bg); }
h2 { margin: 0 0 .3rem; font-size: 1.08rem; }
.lead { margin: 0 0 .9rem; color: var(--ink-2); font-size: .92rem; }
.where { font-size: .82rem; color: var(--ink-3); margin: .3rem 0 0; }
.field { display: flex; flex-direction: column; gap: .3rem; margin-bottom: 1rem; }
.field:last-of-type { margin-bottom: 1rem; }
label { font-weight: 600; font-size: .93rem; }
input, textarea {
  font: inherit; width: 100%; padding: .6rem .7rem; min-height: 46px;
  border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink);
}
textarea { min-height: 5rem; resize: vertical; }
input:focus-visible, textarea:focus-visible, .btn:focus-visible, .slot:focus-visible { outline: 2px solid var(--key); outline-offset: 2px; }
.btn {
  font: inherit; font-weight: 600; border: 1px solid var(--line); background: var(--card); color: var(--ink);
  border-radius: 6px; padding: .55rem 1.1rem; min-height: 46px; cursor: pointer;
}
.btn.primary { background: var(--key); border-color: var(--key); color: var(--key-ink); }
.btn.small { min-height: 36px; padding: .2rem .7rem; font-size: .85rem; }
.btn:disabled { opacity: .45; cursor: default; }
.slots { display: grid; grid-template-columns: repeat(auto-fill, minmax(5.2rem, 1fr)); gap: .5rem; }
.slot {
  font: inherit; padding: .55rem .2rem; min-height: 46px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.slot.on { background: var(--key); border-color: var(--key); color: var(--key-ink); font-weight: 600; }
.slot:disabled { opacity: .38; cursor: default; text-decoration: line-through; }
.err { margin: .8rem 0 0; padding: .7rem .9rem; border-radius: 6px; background: var(--bad-bg); color: var(--bad); font-size: .9rem; }
.cmd { display: flex; gap: .5rem; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: .5rem .7rem; margin-bottom: .9rem; overflow-x: auto; }
.cmd code { font-family: ui-monospace, monospace; font-size: .8rem; white-space: nowrap; flex: 1; }
.foot { max-width: 40rem; margin: 0 auto; padding: 0 1rem 2rem; font-size: .82rem; color: var(--ink-3); }
.foot code { font-family: ui-monospace, monospace; }