:root {
  --bg: #f6f7f9; --card: #fff; --ink: #1c2026; --sub: #5b6470; --line: #dde1e6;
  --pri: #1f6feb; --pri-ink: #fff; --danger: #c93c37; --ok-bg: #e7f5ec; --ok-ink: #1d6b3a;
  --err-bg: #fdecea; --err-ink: #9b2c26; --warn-bg: #fff6e0; --warn-ink: #7a5600;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418; --card: #1a1f25; --ink: #e8ebef; --sub: #9aa4b0; --line: #2c333b;
    --pri: #4c8dff; --ok-bg: #173323; --ok-ink: #8fd6a8; --err-bg: #3a1c1a; --err-ink: #f2a19b;
    --warn-bg: #3a2f12; --warn-ink: #f0cf7a;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.55 -apple-system, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", sans-serif; }
.top { display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--card); }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
.wrap { max-width: 480px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.5rem; margin: 8px 0 4px; }
h2 { font-size: 1.1rem; margin: 0 0 8px; }
.sub { color: var(--sub); margin: 4px 0 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 12px 0; }
fieldset { border: 0; padding: 0; margin: 0 0 16px; }
legend { font-weight: 700; margin-bottom: 8px; }
label, .field { display: block; margin: 0 0 12px; }
.lbl { display: block; }
input[type=email], input[type=password], input:not([type]), input[type=date] {
  display: block; width: 100%; margin-top: 4px; padding: 11px 12px; font-size: 16px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); }
small { display: block; color: var(--sub); font-size: .85rem; margin-top: 4px; }
.seg { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.seg label { margin: 0; padding: 8px 12px; border: 1px solid var(--line); border-radius: 8px; }
.check { display: flex; gap: 8px; align-items: center; }
.note { color: var(--sub); font-size: .92rem; }
button, .btnlike { display: inline-block; padding: 11px 16px; font-size: 16px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink); cursor: pointer; text-decoration: none; }
button.primary { width: 100%; background: var(--pri); color: var(--pri-ink); border-color: var(--pri); }
button.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
button.link { border: 0; background: none; color: var(--sub); padding: 4px; font-size: .95rem; }
.danger-link { color: var(--danger); }
.row { display: flex; gap: 8px; margin: 8px 0; }
.alert { padding: 10px 12px; border-radius: 8px; margin: 8px 0; }
.alert.ok { background: var(--ok-bg); color: var(--ok-ink); }
.alert.err { background: var(--err-bg); color: var(--err-ink); }
.alert.warn { background: var(--warn-bg); color: var(--warn-ink); }
.keybox { display: flex; gap: 8px; align-items: center; margin-top: 8px; }
.keybox code { flex: 1; min-width: 0; overflow-wrap: anywhere; padding: 10px; border-radius: 8px;
  background: var(--bg); border: 1px solid var(--line); font-size: .9rem; }