:root {
  color-scheme: light;
  font-family: Pretendard, "Noto Sans KR", system-ui, sans-serif;
  color: #171719;
  background: #f7fcff;
}

* { box-sizing: border-box; }
body { margin: 0; line-height: 1.65; }
a { color: #0369a1; }
.shell { width: min(860px, calc(100% - 32px)); margin: 0 auto; padding: 40px 0 72px; }
.brand { color: #0369a1; font-weight: 900; letter-spacing: -.02em; }
.card { background: #fff; border: 2px solid #bae6fd; border-radius: 6px; padding: 24px; margin-top: 16px; }
h1 { font-size: clamp(26px, 6vw, 40px); line-height: 1.25; margin: 8px 0; }
h2 { font-size: 20px; margin: 0 0 10px; }
p, li { color: #2e2f33; }
.muted { color: #6b7280; font-size: 14px; }
.warning { background: #fff7ed; border-color: #fdba74; }
label { display: block; font-weight: 800; margin: 14px 0 6px; }
input, select, textarea { width: 100%; border: 1px solid #bae6fd; border-radius: 4px; padding: 12px; font: inherit; background: #fff; }
textarea { min-height: 110px; resize: vertical; }
.check { display: flex; gap: 9px; align-items: flex-start; font-weight: 600; }
.check input { width: auto; margin-top: 7px; }
button { width: 100%; border: 0; border-radius: 4px; padding: 14px; background: #0284c7; color: #fff; font: inherit; font-weight: 900; cursor: pointer; margin-top: 18px; }
button:disabled { opacity: .55; cursor: wait; }
.result { display: none; white-space: pre-wrap; }
nav { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 14px; }