:root {
  --bg: #f2f4f6; --card: #ffffff; --text: #191f28; --sub: #6b7684; --muted: #8b95a1;
  --line: #e5e8eb; --blue: #3182f6; --blue-weak: #e8f3ff; --orange: #e8590c; --orange-weak: #fff4e6;
  --green: #03b26c; --danger: #f04452;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #101013; --card: #1c1c21; --text: #e9ebee; --sub: #9ea5ad; --muted: #7e858d;
    --line: #2c2c34; --blue-weak: #1b2a40; --orange-weak: #3a2616; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif; -webkit-font-smoothing: antialiased; word-break: keep-all; overflow-wrap: anywhere; }
main { max-width: 480px; margin: 0 auto; padding: 20px 16px 48px; }
h1 { font-size: 26px; line-height: 1.35; margin: 24px 0 8px; letter-spacing: -0.02em; }
h2 { font-size: 18px; margin: 0 0 12px; }
p { margin: 0 0 8px; }
.sub { color: var(--sub); }
.muted { color: var(--muted); font-size: 13px; }
.card { background: var(--card); border-radius: 16px; padding: 20px; margin: 12px 0; }
label { display: block; font-size: 14px; color: var(--sub); margin: 16px 0 6px; }
input[type=text], input[type=email], input[type=tel] { width: 100%; font-size: 17px; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); color: var(--text); outline: none; }
input:focus { border-color: var(--blue); }
.addr-input { display: flex; align-items: center; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.addr-input input { border: 0; border-radius: 0; flex: 1; min-width: 0; }
.addr-input span { padding: 0 14px; color: var(--sub); white-space: nowrap; }
.hint { font-size: 13px; margin-top: 6px; min-height: 18px; }
.hint.ok { color: var(--green); } .hint.bad { color: var(--danger); }
button, .btn { display: block; width: 100%; font-size: 17px; font-weight: 600; padding: 15px; border: 0; border-radius: 14px; background: var(--blue); color: #fff; cursor: pointer; text-align: center; text-decoration: none; }
button:disabled { opacity: 0.4; cursor: default; }
button.ghost, .btn.ghost { background: var(--blue-weak); color: var(--blue); }
button.link { background: none; color: var(--sub); font-weight: 400; font-size: 14px; padding: 8px; width: auto; display: inline; text-decoration: underline; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--sub); margin: 16px 0; }
.check input { margin-top: 4px; width: 18px; height: 18px; }
.birth-row { display: flex; gap: 8px; margin-bottom: 8px; }
.birth-row input { flex: 1; }
.birth-row button { width: 56px; padding: 0; background: var(--line); color: var(--sub); font-size: 20px; }
.addr { font-size: 20px; font-weight: 700; word-break: break-all; margin: 4px 0 12px; }
.steps { padding-left: 20px; margin: 8px 0; }
.steps li { margin: 6px 0; }
.pill { display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 99px; background: var(--line); color: var(--sub); }
.pill.blue { background: var(--blue-weak); color: var(--blue); }
.pill.orange { background: var(--orange-weak); color: var(--orange); }
.amount { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; }
.row { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.row:first-child { border-top: 0; }
.tip { background: var(--orange-weak); color: var(--orange); border-radius: 10px; padding: 10px 12px; font-size: 14px; margin-top: 8px; }
.usage { font-size: 14px; color: var(--sub); }
.bar { height: 6px; background: var(--line); border-radius: 3px; margin: 4px 0 8px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--blue); }
details summary { cursor: pointer; font-weight: 600; }
.code { font-size: 28px; font-weight: 700; letter-spacing: 0.1em; color: var(--blue); }
.hidden { display: none !important; }
.toast { position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%); background: #333d4b; color: #fff; padding: 10px 18px; border-radius: 99px; font-size: 14px; }