:root {
  --bg: #f6f1e7;
  --ink: #26221e;
  --muted: #6b6359;
  --line: #e1d8c8;
  --card: #fbf8f2;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1a17;
    --ink: #ede6da;
    --muted: #a69d90;
    --line: #36322c;
    --card: #23201c;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", "Malgun Gothic", sans-serif;
  word-break: keep-all;
  overflow-wrap: break-word;
}
a { color: inherit; }
.top, main, footer { max-width: 640px; margin: 0 auto; padding: 0 20px; }
.top {
  display: flex; justify-content: space-between; align-items: center;
  height: 64px;
}
.top a { text-decoration: none; padding: 8px 0; }
.brand { font-weight: 700; font-size: 20px; letter-spacing: -0.02em; }
.intro { padding: 40px 0 0; }
h1 { font-size: 28px; line-height: 1.35; letter-spacing: -0.03em; margin: 0 0 12px; }
.intro p { margin: 0; color: var(--muted); }
h2 {
  font-size: 14px; font-weight: 600; color: var(--muted);
  margin: 0 0 12px; letter-spacing: 0.02em;
}
section + section { margin-top: 48px; }
.apps { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.apps li { border-bottom: 1px solid var(--line); padding: 18px 0 14px; }
.app { display: flex; gap: 14px; align-items: center; text-decoration: none; }
.app img {
  width: 60px; height: 60px; border-radius: 14px; flex: none;
  border: 1px solid var(--line); background: var(--card);
}
.app strong { display: block; font-size: 18px; }
.what { display: block; color: var(--muted); font-size: 15px; line-height: 1.5; }
.links { margin: 10px 0 0 74px; font-size: 14px; display: flex; flex-wrap: wrap; gap: 4px 0; }
.links a {
  color: var(--muted); text-underline-offset: 3px;
  padding: 6px 14px 6px 0;
}
.links a:first-child { color: var(--ink); font-weight: 600; }
#contact p { margin: 0 0 8px; }
.mail {
  display: inline-block; margin-top: 4px;
  font-size: 20px; font-weight: 600; text-underline-offset: 4px;
  padding: 6px 0;
}
footer {
  margin-top: 64px; padding-top: 20px; padding-bottom: 40px;
  background: linear-gradient(var(--line), var(--line)) 20px 0 / calc(100% - 40px) 1px no-repeat;
  font-size: 14px; color: var(--muted);
}
footer p { margin: 0 0 6px; }
footer a { text-underline-offset: 3px; display: inline-block; padding: 8px 0; }
.policy { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.policy li { border-bottom: 1px solid var(--line); }
.policy a { display: flex; justify-content: space-between; gap: 12px; padding: 16px 0; text-decoration: none; }
.policy .go { color: var(--muted); text-decoration: underline; text-underline-offset: 3px; }
.back { display: inline-block; margin-top: 32px; padding: 6px 0; color: var(--muted); }
/* 태블릿·데스크톱: 넓은 화면이 기본, 좁은 폰에서만 위의 한 열 */
@media (min-width: 720px) {
  .top, main, footer { max-width: 1120px; padding: 0 40px; }
  .top { height: 80px; }
  .intro { padding: 96px 0 0; max-width: 760px; }
  h1 { font-size: 48px; line-height: 1.25; margin-bottom: 18px; }
  .intro p { font-size: 20px; }
  section + section { margin-top: 88px; }
  h2 { font-size: 15px; margin-bottom: 20px; }
  .apps {
    border-top: 0;
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
  }
  .apps li {
    border: 1px solid var(--line); border-radius: 18px;
    background: var(--card);
    padding: 26px 26px 18px;
    display: flex; flex-direction: column;
  }
  .app { flex-direction: column; align-items: flex-start; gap: 16px; flex: 1; }
  .app img { width: 72px; height: 72px; border-radius: 17px; }
  .app strong { font-size: 20px; margin-bottom: 4px; }
  .what { font-size: 16px; }
  .links { margin: 16px 0 0; }
  #contact {
    display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 8px 40px;
    border-top: 1px solid var(--line); padding-top: 40px;
  }
  #contact h2 { grid-column: 1 / -1; margin: 0; }
  #contact p { margin: 0; font-size: 18px; }
  .mail { font-size: 28px; margin: 0; }
  footer { background-position: 40px 0; background-size: calc(100% - 80px) 1px; }
  footer { margin-top: 96px; display: flex; justify-content: space-between; align-items: center; }
  footer p { margin: 0; }
  .policy { max-width: 760px; }
}
@media (min-width: 1024px) {
  .apps { grid-template-columns: repeat(3, 1fr); gap: 24px; }
  h1 { font-size: 56px; }
}