/* 어두운 음악 앱 바탕 + 공부 노트. 강조색은 주황. 모서리는 각지게, 구분은 선과 밑줄로 한다. */
:root {
  color-scheme: dark;
  --bg: #0f0f0f;
  --surface: #191919;
  --surface-2: #262626;
  --ink: #ffffff;
  --ink-2: #d0d0d0;
  --ink-3: #9a9a9a;
  --line: #333333;
  --accent: #ff7a1a;
  --accent-ink: #000000;
  --r: 3px;        /* 버튼·태그 */
  --r-card: 6px;   /* 카드·영상 */
  --font-ko: "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  --font-jp: "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  /* 급수 색: 쉬움(초록) → 어려움(빨강) */
  --n5: #4fd08a; --n4: #7fd0c0; --n3: #7fb2ff; --n2: #c89bff; --n1: #ff7a8a; --n0: #8a8a8a;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font-family: var(--font-ko); font-size: 15px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  display: grid; grid-template-columns: 200px minmax(0, 1fr); min-height: 100vh;
}
a { color: inherit; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
[lang="ja"] { font-family: var(--font-jp); }
h1 { margin: 0; font-size: 28px; letter-spacing: -.01em; }
h1 small { font-size: 16px; font-weight: 500; color: var(--ink-3); margin-left: 6px; }
h2 { margin: 32px 0 12px; font-size: 18px; }
.sub { margin: 4px 0 20px; color: var(--ink-3); }
.muted { color: var(--ink-3); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- 옆 메뉴 ---------- */
.side {
  position: sticky; top: 0; align-self: start; height: 100vh;
  display: flex; flex-direction: column; padding: 20px 0;
  background: #000; border-right: 1px solid var(--line);
}
.side a { text-decoration: none; padding: 10px 20px; color: var(--ink-3); font-weight: 700; border-left: 3px solid transparent; }
.side a:hover { color: var(--ink); }
.side a.on { color: var(--ink); border-left-color: var(--accent); }
.side .brand { font-size: 22px; color: var(--ink); margin-bottom: 16px; border-left-color: transparent; }
.side .brand::before {
  content: ""; display: inline-block; width: 18px; height: 18px; margin-right: 9px; vertical-align: -2px; border-radius: 50%;
  background: radial-gradient(circle, #000 0 15%, var(--accent) 16% 38%, #000 39% 46%, var(--accent) 47% 100%);
}
.count { color: var(--accent); font-size: 13px; }
main { padding: 28px 32px 80px; max-width: 1200px; width: 100%; }

/* ---------- 급수 표시: 색 글자 + 테두리 ---------- */
.lv, .ty { display: inline-block; padding: 0 6px; border: 1px solid; border-radius: var(--r); font-size: 11px; font-weight: 700; line-height: 18px; white-space: nowrap; letter-spacing: .02em; }
.lv { color: var(--n0); }
.lv5 { color: var(--n5); } .lv4 { color: var(--n4); } .lv3 { color: var(--n3); }
.lv2 { color: var(--n2); } .lv1 { color: var(--n1); }
.ty { color: var(--ink-3); }
.dist { display: flex; height: 20px; max-width: 520px; border-radius: var(--r); overflow: hidden; margin-bottom: 20px; gap: 1px; }
.dist span { color: #000; font-size: 11px; font-weight: 700; text-align: center; line-height: 20px; min-width: 4px; }
.dist .lv5 { background: var(--n5); } .dist .lv4 { background: var(--n4); } .dist .lv3 { background: var(--n3); }
.dist .lv2 { background: var(--n2); } .dist .lv1 { background: var(--n1); }

/* ---------- 홈 ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 24px 20px; }
.card { display: flex; flex-direction: column; gap: 2px; text-decoration: none; }
.card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--r-card); margin-bottom: 8px; background: #000; transition: opacity .15s; }
.card:hover img { opacity: .8; }
.card-title { font-weight: 700; font-size: 16px; }
.card-title small { font-weight: 500; color: var(--ink-3); }
.card-artist { color: var(--ink-3); font-size: 13px; }
.card-meta { margin-top: 6px; font-size: 13px; color: var(--ink-2); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ---------- 곡 ---------- */
.back { display: inline-block; margin-bottom: 12px; color: var(--ink-3); text-decoration: none; font-size: 14px; }
.back:hover { color: var(--ink); }
.song-head .sub { margin-bottom: 12px; }
.stage { display: grid; grid-template-columns: minmax(0, 3fr) minmax(280px, 2fr); gap: 20px; align-items: start; }
.video { aspect-ratio: 16 / 9; background: #000; border-radius: var(--r-card); overflow: hidden; }
.video iframe { width: 100%; height: 100%; display: block; border: 0; }
.ctrl { display: flex; align-items: center; gap: 6px; margin-top: 10px; }
/* 재생 조작: 상자 없이 아이콘과 글자만 */
.ctrl button { min-width: 40px; height: 40px; border: 0; background: none; color: var(--ink-3); font-weight: 700; font-size: 13px; display: grid; place-items: center; }
.ctrl button:hover { color: var(--ink); }
.ctrl #play { color: var(--ink); }
.ctrl #play:hover { color: var(--accent); }
.ctrl #play svg { width: 30px; height: 30px; }
.ctrl input[type=range] { flex: 1; accent-color: var(--accent); min-width: 0; margin: 0 6px; }
.time { font-size: 13px; color: var(--ink-3); font-variant-numeric: tabular-nums; white-space: nowrap; }
.now { border: 1px solid var(--line); border-top: 2px solid var(--accent); border-radius: var(--r-card); padding: 14px 16px 16px; max-height: 70vh; overflow: auto; }
.now h2 { margin: 0 0 12px; font-size: 13px; color: var(--accent); letter-spacing: .04em; }
.now .items { grid-template-columns: 1fr; }

/* ---------- 급수 필터: 밑줄 탭 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 0 4px; margin-bottom: 16px; border-bottom: 1px solid var(--line); }
.chip { border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; padding: 8px 10px; background: none; color: var(--ink-3); font-size: 14px; font-weight: 700; }
.chip:hover { color: var(--ink); }
.chip b { font-weight: 500; font-size: 12px; margin-left: 2px; opacity: .7; }
.chip.on { color: var(--ink); border-bottom-color: var(--accent); }

/* ---------- 표현 카드 ---------- */
/* 한 줄에 최대 3칸. 칸이 넓어야 긴 표현도 같은 모양을 유지한다 */
.items { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 8px; }
.grp + .grp { margin-top: 32px; }
/* 묶음 제목: 급수 글자는 카드에 있으니 여기서는 급수 색 선과 개수만 둔다 */
.grp h3 { margin: 0 0 10px; display: flex; align-items: center; gap: 10px; }
.grp h3::before { content: ""; flex: 1; height: 2px; background: currentColor; opacity: .55; }
.lv0 { color: var(--n0); }
.grp h3 small { color: var(--ink-3); font-weight: 500; font-size: 13px; }
.hint { margin: -6px 0 12px; font-size: 13px; color: var(--ink-3); }
.item { background: var(--surface); border-radius: var(--r-card); padding: 12px 14px; display: flex; flex-direction: column; gap: 2px; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.item.saved { box-shadow: inset 3px 0 0 var(--accent); } /* 단어장에 담긴 표현 */
.play { border: 0; background: none; padding: 4px; margin-top: 4px; color: var(--ink-3); display: grid; }
.play:hover { color: var(--accent); }
.play svg { width: 16px; height: 16px; }
/* 첫 줄: 표기·읽기 | 태그 | ▶ . 태그와 ▶ 는 늘 오른쪽 위에 고정되고, 긴 표기는 왼쪽 칸 안에서만 줄을 바꾼다 */
.item-top { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: start; gap: 8px; }
.head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 8px; min-width: 0; }
.tags { display: flex; gap: 4px; padding-top: 7px; }
.tags:empty { display: none; }
.w { font-size: 20px; font-weight: 700; }
.r, .alt { color: var(--ink-3); font-size: 13px; }
.m { color: var(--ink-2); }
/* 한글 발음: 읽기 글자에 커서를 올리거나 누르면 말풍선으로 뜬다 */
.pron { position: relative; border: 0; background: none; padding: 0; cursor: help; font-family: var(--font-jp); }
.pron::after {
  content: attr(data-pron); display: none; position: absolute; left: 0; bottom: calc(100% + 4px); z-index: 5;
  padding: 2px 8px; border-radius: var(--r); background: var(--ink); color: #000;
  font: 700 13px var(--font-ko); white-space: nowrap; pointer-events: none;
}
.pron.show::after, .pron:focus-visible::after { display: block; }
@media (hover: hover) { .pron:hover::after { display: block; } }
.also { font-size: 12px; color: var(--ink-3); }
.also a { color: var(--ink-2); }
.also a:hover, .more:hover { color: var(--accent); }
.more { border: 0; background: none; padding: 4px 0; margin: -4px 0; font-size: 12px; color: var(--ink-2); text-decoration: underline; }

/* ---------- 표현이 나오는 노래 목록 창 ---------- */
dialog { width: min(480px, 92vw); max-height: 80vh; padding: 0; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--surface); color: var(--ink); }
dialog[open] { display: flex; flex-direction: column; }
dialog::backdrop { background: rgba(0, 0, 0, .6); }
dialog header { display: flex; align-items: center; justify-content: space-between; padding: 12px 8px 12px 16px; border-bottom: 1px solid var(--line); }
dialog h2 { margin: 0; font-size: 16px; }
dialog header button { border: 0; background: none; width: 36px; height: 36px; color: var(--ink-3); }
dialog header button:hover { color: var(--ink); }
.rows { overflow: auto; }
.row { display: flex; align-items: center; gap: 12px; padding: 8px 16px; text-decoration: none; }
.row + .row { border-top: 1px solid var(--line); }
.row:hover { background: var(--surface-2); }
.row img { width: 64px; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--r); background: #000; flex: none; }
.row-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.35; }
.row-text b, .row-text small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row-text small { color: var(--ink-3); }
.row-time { margin-left: auto; color: var(--ink-3); font-size: 13px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.row:hover .row-time { color: var(--accent); }

.toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%); background: var(--ink); color: #000; padding: 8px 16px; border-radius: var(--r); font-weight: 700; z-index: 50; }

/* ---------- 좁은 화면 ---------- */
@media (max-width: 860px) {
  body { display: block; }
  .side { height: auto; flex-direction: row; align-items: center; padding: 0 8px; z-index: 20; border-right: 0; border-bottom: 1px solid var(--line); }
  .side a { padding: 14px 12px; border-left: 0; border-bottom: 3px solid transparent; }
  .side a.on { border-bottom-color: var(--accent); }
  .side .brand { margin: 0 auto 0 4px; }
  main { padding: 20px 16px 60px; }
  .stage { grid-template-columns: 1fr; }
  .now { max-height: none; }
}