```css
:root {
  color-scheme: dark;

  --bg: #171c19;
  --text: #f1f0e7;
  --muted: #a9b3a9;
  --line: #394139;
  --accent: #d1dfb5;
  --panel: #202720;
  --lyrics: 20px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Apple SD Gothic Neo",
    "Noto Sans KR",
    sans-serif;
  line-height: 1.7;
}

body.light {
  color-scheme: light;

  --bg: #f7f5ee;
  --text: #242d24;
  --muted: #636e62;
  --line: #d5d8cb;
  --accent: #455f31;
  --panel: #edeedf;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: transparent;

  padding: 8px 14px;
  min-height: 40px;

  cursor: pointer;
}

button:hover,
a.row:hover {
  background: var(--panel);
}

button:disabled {
  opacity: 0.35;
  cursor: default;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}


/* =========================
   상단 고정 영역
========================= */

.top {
  position: sticky;
  top: 0;
  z-index: 20;

  width: 100%;
  background: var(--bg);

  /* 상단 아래 구분선 */
  border-bottom: 1px solid var(--line);
}

.top-inner {
  max-width: 1000px;
  margin: auto;

  /* 첫 번째 값 = 위아래 높이
     두 번째 값 = 좌우 여백 */
  padding: 12px 32px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.home {
  font-size: 11px;
  letter-spacing: 2px;
}

/* PC에서도 밝은 화면 버튼 크기 통일 */
.top button {
  font-size: 12px;
}


/* =========================
   메인 영역
========================= */

main {
  max-width: 760px;
  min-height: 70vh;

  margin: auto;
  padding: 58px 28px 40px;
}

.eyebrow {
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
}

h1 {
  margin: 18px 0 20px;

  font-size: clamp(32px, 6vw, 54px);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -2px;

  word-break: keep-all;
}

h2 {
  font-size: 19px;
  font-weight: 500;
}

.meta,
.muted {
  color: var(--muted);
  font-size: 14px;
}

.meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.intro {
  padding-bottom: 40px;
}

.demo {
  display: inline-block;

  margin-top: 24px;
  padding: 8px 12px;

  border: 1px solid var(--line);

  color: var(--muted);
  font-size: 12px;
}


/* =========================
   공연 목록
========================= */

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 12px 0;

  border-bottom: 1px solid var(--line);
}

.section-head span {
  color: var(--muted);
  font-size: 12px;
}

.row {
  display: grid;
  grid-template-columns: 48px 1fr 24px;
  align-items: center;

  gap: 12px;
  padding: 25px 4px;

  border-bottom: 1px solid var(--line);
}

.number {
  font: italic 27px Georgia, serif;
  color: var(--accent);
}

.song-title {
  display: block;

  font-size: 21px;
  line-height: 1.5;
}

.artist {
  color: var(--muted);
  font-size: 13px;
}

.arrow {
  color: var(--accent);
  font-size: 22px;
}


/* =========================
   안내 / 정보
========================= */

.notice {
  margin-top: 36px;
  padding: 20px 24px;

  border-radius: 3px;

  background: var(--panel);

  color: var(--muted);
  font-size: 14px;
}

.info {
  margin-top: 32px;

  white-space: pre-wrap;

  color: var(--muted);
  font-size: 14px;
}


/* =========================
   푸터
========================= */

footer {
  padding: 32px;

  text-align: center;

  color: var(--muted);
  font-size: 11px;
  letter-spacing: 2px;
}


/* =========================
   상세 페이지
========================= */

.back {
  display: inline-block;

  margin-bottom: 32px;
  padding: 6px 0;

  color: var(--muted);
  font-size: 14px;
}

.detail h1 {
  margin-top: 10px;
}

.detail .artist {
  font-size: 16px;
}

.description {
  margin: 32px 0;
  padding: 18px 0;

  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);

  color: var(--muted);
  font-size: 14px;
}

summary {
  padding: 4px 0;

  color: var(--text);

  cursor: pointer;
}

.description p {
  margin-bottom: 0;
}


/* =========================
   가사 크기 조절 영역
========================= */

.reader {
  display: flex;
  align-items: center;
  justify-content: space-between;

  gap: 16px;
  margin: 32px 0 24px;
}

.reader span {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 2px;
}

.reader div {
  display: flex;
  gap: 8px;
}

.lyrics {
  margin: 0 0 56px;

  white-space: pre-wrap;
  overflow-wrap: anywhere;

  font-size: var(--lyrics);
  line-height: 2.05;
}


/* =========================
   이전 / 다음 곡
========================= */

.navigation {
  display: flex;
  justify-content: space-between;

  gap: 12px;
  padding-top: 24px;

  border-top: 1px solid var(--line);
}

.navigation a {
  max-width: 48%;
  padding: 12px 0;

  font-size: 14px;
}

.navigation a:last-child {
  text-align: right;
}


/* =========================
   접근성
========================= */

.skip {
  position: absolute;
  top: -100px;
}

.skip:focus {
  top: 4px;
  z-index: 2;

  padding: 12px;

  background: var(--bg);
}


/* =========================
   모바일
========================= */

@media (max-width: 480px) {
  .top-inner {
    padding: 12px 22px;
  }

  .top button {
    padding: 8px 12px;
    font-size: 12px;
  }

  main {
    padding: 36px 22px;
  }

  .row {
    grid-template-columns: 36px 1fr 20px;
  }

  .song-title {
    font-size: 19px;
  }

  h1 {
    letter-spacing: -1px;
  }

  .intro {
    padding-bottom: 24px;
  }
}
```