:root {
  --bg: #f7f7f4;
  --text: #1c1d1f;
  --muted: #62656b;
  --accent: #2f5fd0;
  --accent-text: #ffffff;
  --line: #dfe0da;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141517;
    --text: #eeeeea;
    --muted: #a3a6ac;
    --accent: #8fb0ff;
    --accent-text: #10131a;
    --line: #2c2e32;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  padding: 24px 16px;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  line-height: 1.6;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
}

.mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin: 0 0 28px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2.25rem, 9vw, 3.25rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 8px;
  font-size: clamp(1.125rem, 4.5vw, 1.375rem);
}

.note {
  margin: 0;
  color: var(--muted);
  word-break: keep-all;
}

footer {
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}