/* 순백 바탕 + 은은한 빛 + 가는 원. 외부 폰트·이미지 없음(시스템 글꼴). */
:root {
  color-scheme: light;
  --ink: #14161c;
  --muted: #5b6070;
  --line: rgba(20, 30, 60, 0.1);
  --glow: rgba(140, 170, 255, 0.16);
}

* { box-sizing: border-box; }

html { background: #fff; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 0 16px;
  background: #fff;
  color: var(--ink);
  font: 16px/1.7 system-ui, -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  word-break: keep-all;
  overflow-wrap: anywhere;
  isolation: isolate;
}

/* 장식: 빛을 품은 큰 원 + 작은 원. 화면에 고정, 클릭을 받지 않는다. */
body::before,
body::after {
  content: "";
  position: fixed;
  left: 50%;
  top: 42%;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: -1;
}
body::before {
  width: min(620px, 130vw);
  background: radial-gradient(circle, var(--glow), transparent 65%);
}
body::after { width: min(380px, 80vw); }

main {
  flex: 1;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.badge {
  display: inline-block;
  margin: 0 0 20px;
  padding: 4px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--muted);
  font-size: 13px;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 9vw, 64px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.tentative {
  font-size: 0.4em;
  font-weight: 400;
  color: var(--muted);
  vertical-align: middle;
}

.lead {
  margin: 20px 0 0;
  max-width: 28em;
  color: var(--muted);
  font-size: clamp(16px, 4.2vw, 19px);
}

.doc { padding: 56px 0 32px; }
.doc h1 { font-size: clamp(28px, 7vw, 36px); }
.doc h2 { margin: 32px 0 8px; font-size: 18px; font-weight: 600; }
.doc p { margin: 0 0 8px; }
.meta { color: var(--muted); font-size: 14px; }

.foot {
  padding: 24px 0 32px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.foot p { margin: 4px 0; }
.foot time { white-space: nowrap; }

a { color: inherit; text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid #4a6cf7; outline-offset: 2px; border-radius: 2px; }