:root {
  color-scheme: light;
  --text: #333;
  --muted: #999;
  --line: #f0f0f0;
  /* 1% of the screen width, capped so a landscape pad does not inflate type. */
  --u: min(1vw, 6.5px);
  --bar: calc(var(--u) * 14.933);
  --search: calc(var(--u) * 14.4);
  --safe-bottom: env(safe-area-inset-bottom);
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: #fff; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--text);
  font-size: calc(var(--u) * 3.4);
}
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: transparent; }
ul { margin: 0; padding: 0; list-style: none; }
.hidden { display: none !important; }

.phone {
  height: 100%;
  height: 100dvh;
  width: 100%;
  margin: 0 auto;
  background: #fff;
  position: relative;
  display: flex;
  flex-direction: column;
  padding-bottom: calc(var(--bar) + var(--safe-bottom));
}
.phone.compact .search-tab { display: none; }
.phone.compact .page { height: auto; flex: 1; }

.legal {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  background: #fff;
  color: var(--muted);
  font-size: calc(var(--u) * 3);
  line-height: 1.55;
}
.legal.placed {
  position: static;
  width: auto;
  height: auto;
  overflow: visible;
  clip: auto;
  margin-top: calc(var(--u) * 4);
  padding: calc(var(--u) * 3) 0 calc(var(--u) * 4);
  border-top: 1px solid #f0f0f0;
}
.legal p { margin: 0; }
.legal-links { margin-top: calc(var(--u) * 1) !important; }
.legal a,
.doc a { color: #333; }
.legal-links a { margin-right: calc(var(--u) * 3.2); }

.doc {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 20px 64px;
  color: #333;
  font-size: 16px;
  line-height: 1.7;
}
.doc h1 { margin: 12px 0 8px; font-size: 28px; }
.doc h2 { margin: 28px 0 8px; font-size: 18px; }
.doc p { margin: 0 0 12px; }
.doc .back { color: #666; font-size: 14px; }

.search-tab {
  flex: 0 0 auto;
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: calc(var(--u) * 2.4);
  height: var(--search);
  padding: calc(var(--u) * 2.4) calc(var(--u) * 4);
  background: #fff;
}
.room-chip {
  flex: 0 0 auto;
  border: 0;
  color: #666;
  font-size: calc(var(--u) * 3.4);
  font-weight: 600;
}
.search { flex: 1; }
.search input {
  width: 100%;
  height: calc(var(--u) * 9.2);
  border: 0;
  border-radius: 999px;
  background: #f4f4f4;
  padding: 0 calc(var(--u) * 4);
  outline: none;
  font-size: calc(var(--u) * 3.6);
}

.page {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  background: #fff;
}
#result {
  padding: calc(var(--u) * 2.4) calc(var(--u) * 4) calc(var(--u) * 14);
}
.sheet-page {
  display: flex;
  overflow: hidden;
  min-height: 0;
  background: #f6f6f6;
}

.left-wrap {
  width: calc(var(--u) * 21.5);
  flex: 0 0 calc(var(--u) * 21.5);
  height: 100%;
  min-height: 0;
  overflow-y: auto;
  background: #f6f6f6;
}
.left-wrap li {
  min-height: calc(var(--u) * 13);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--u) * 2.6) calc(var(--u) * 1.6);
  text-align: center;
  color: #666;
  font-size: calc(var(--u) * 3.4);
}
.left-wrap li.active {
  background: #fff;
  color: #111;
  font-weight: 700;
}
.right-wrap {
  flex: 1;
  height: 100%;
  min-width: 0;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  background: #fff;
  padding: 0 calc(var(--u) * 3.2) calc(var(--u) * 6);
}
.right-wrap:not(:has(.category-wrapper)) {
  padding-top: calc(var(--u) * 2.4);
}
.category-wrapper { margin-bottom: calc(var(--u) * 5); }
.category-wrapper .category-title {
  position: sticky;
  top: 0;
  z-index: 2;
  margin: 0 0 calc(var(--u) * 2.2);
  padding: calc(var(--u) * 2.2) 0 calc(var(--u) * 1.4);
  background: #fff;
}
.category-title, .section-title {
  margin: calc(var(--u) * 1) 0 calc(var(--u) * 2.6);
  font-size: calc(var(--u) * 4);
  font-weight: 700;
}
.sheet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(46%, 168px), 1fr));
  gap: calc(var(--u) * 2.4);
  min-width: 0;
}
.sheet-card {
  text-align: left;
  border: 0;
  border-radius: calc(var(--u) * 2.6);
  min-width: 0;
  min-height: calc(var(--u) * 28);
  padding: calc(var(--u) * 3) calc(var(--u) * 2.6);
  overflow: hidden;
  color: #fff;
  background: linear-gradient(145deg, #8b76f6, #5b4bd6);
}
.sheet-card strong { display: block; font-size: calc(var(--u) * 3.8); margin-bottom: calc(var(--u) * 1.6); }
.sheet-card span {
  display: block;
  font-size: calc(var(--u) * 2.8);
  line-height: 1.45;
  opacity: 0.9;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sheet-back {
  border: 0;
  color: #666;
  padding: 0 0 calc(var(--u) * 2);
  font-size: calc(var(--u) * 3.4);
}

.song {
  display: flex;
  align-items: center;
  gap: calc(var(--u) * 2.4);
  padding: calc(var(--u) * 3) 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
}
.song .cover {
  width: calc(var(--u) * 10.6);
  height: calc(var(--u) * 10.6);
  border-radius: calc(var(--u) * 1.6);
  object-fit: cover;
  background: #eee;
  flex: 0 0 auto;
}
.song .meta { flex: 1; min-width: 0; }
.song .name {
  font-size: calc(var(--u) * 4);
  font-weight: 650;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.song .singer { margin-top: calc(var(--u) * 0.6); color: var(--muted); font-size: calc(var(--u) * 3.1); }
.actions { display: flex; gap: calc(var(--u) * 1.6); flex-shrink: 0; }
.order, .tiny, .primary, .ghost {
  border-radius: 999px;
  border: 1px solid #ffd5dc;
  background: #fff;
  color: #ff4d6a;
  padding: calc(var(--u) * 1.2) calc(var(--u) * 2.8);
  font-size: calc(var(--u) * 3.2);
  font-weight: 650;
}
.order.top, .tiny { color: #666; border-color: #e6e6e6; }
.tiny.danger { color: #ff4d6a; }
.badge {
  margin-left: calc(var(--u) * 1.2);
  font-size: calc(var(--u) * 2.6);
  color: #8b76f6;
  border: 1px solid #ddd6ff;
  border-radius: 999px;
  padding: 0 calc(var(--u) * 1.2);
}
.playing { color: #2f9e62; font-size: calc(var(--u) * 2.8); }
.empty {
  margin: 0;
  padding: calc(var(--u) * 14) calc(var(--u) * 4);
  text-align: center;
  color: var(--muted);
  line-height: 1.6;
  overflow-wrap: anywhere;
}
.empty strong {
  display: block;
  margin-bottom: calc(var(--u) * 1.2);
  color: #666;
  font-size: calc(var(--u) * 4);
  font-weight: 650;
}
.scroll-sentinel { height: 1px; }
.singer-row {
  display: flex;
  gap: calc(var(--u) * 2);
  overflow-x: auto;
  margin: calc(var(--u) * 0.4) 0 calc(var(--u) * 2);
  padding-bottom: calc(var(--u) * 0.6);
}
.chip {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  width: fit-content;
  max-width: 100%;
  gap: calc(var(--u) * 2);
  margin: 0;
  border: 0;
  background: #f6f6f6;
  border-radius: 999px;
  padding: calc(var(--u) * 1.2) calc(var(--u) * 3.2) calc(var(--u) * 1.2) calc(var(--u) * 1.2);
}
.chip img { width: calc(var(--u) * 8); height: calc(var(--u) * 8); border-radius: 50%; object-fit: cover; }

#remote {
  padding: calc(var(--u) * 5.5) calc(var(--u) * 5.5) calc(var(--u) * 8);
  background: #f5f6f8;
}
#remote h1,
#remote .room-line,
#remote .pad {
  width: min(100%, 680px);
  margin-left: auto;
  margin-right: auto;
}
#remote h1 {
  margin-top: calc(var(--u) * 0.6);
  font-size: calc(var(--u) * 5.4);
  font-weight: 700;
  line-height: 1.2;
}
#remote .room-line {
  margin-top: calc(var(--u) * 1.8);
  margin-bottom: calc(var(--u) * 5.5);
  color: var(--muted);
  font-size: calc(var(--u) * 3.3);
}
#remote .pad {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: calc(var(--u) * 3.4);
  padding: 0;
}
#remote .pad-btn {
  aspect-ratio: 1;
  border: 0;
  border-radius: calc(var(--u) * 4.6);
  padding: calc(var(--u) * 4) calc(var(--u) * 2);
  background: #fff;
  box-shadow: 0 calc(var(--u) * 0.8) calc(var(--u) * 2.4) rgba(0, 0, 0, 0.04);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: calc(var(--u) * 2.4);
  color: #222;
  font-size: calc(var(--u) * 3.5);
  font-weight: 650;
}
#remote .pad-btn img { width: calc(var(--u) * 13); height: calc(var(--u) * 13); object-fit: contain; }

.foot-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: calc(var(--bar) + var(--safe-bottom));
  padding: 0 calc(var(--u) * 6) var(--safe-bottom);
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  background: #fff;
  box-shadow: 0 calc(var(--u) * -0.533) calc(var(--u) * 1.6) rgba(0, 0, 0, 0.04);
  z-index: 10;
}
.foot-bar li {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.foot-text {
  margin: 0;
  width: 100%;
  text-align: center;
  font-weight: 650;
  font-size: calc(var(--u) * 4.267);
  color: #999;
  white-space: nowrap;
}
.foot-bar li.active .foot-text { color: #000; }
.center-tab { flex-direction: column; }
.center-tab .icon {
  width: calc(var(--u) * 12.5);
  height: calc(var(--u) * 12.5);
  margin-top: calc(var(--u) * -4.2);
  object-fit: contain;
}

.row { display: flex; gap: calc(var(--u) * 2); margin-top: calc(var(--u) * 2.4); }
.primary { background: #111; color: #fff; border-color: #111; }

.scan-layer {
  position: fixed; inset: 0; z-index: 20; background: #000;
  display: flex; flex-direction: column; justify-content: flex-end;
}
.scan-layer video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.scan-close {
  position: absolute;
  z-index: 2;
  top: max(calc(var(--u) * 3.6), env(safe-area-inset-top));
  right: calc(var(--u) * 3.6);
  width: calc(var(--u) * 9.6);
  height: calc(var(--u) * 9.6);
  border: 0;
  border-radius: 50%;
  padding: 0;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}
.scan-close svg { width: calc(var(--u) * 5); height: calc(var(--u) * 5); }
.scan-frame {
  position: absolute; left: 50%; top: 42%; width: min(68vw, 360px); aspect-ratio: 1;
  transform: translate(-50%, -50%); border: 2px solid #fff; border-radius: calc(var(--u) * 4);
  box-shadow: 0 0 0 2000px rgba(0, 0, 0, 0.35);
}
.scan-bar { position: relative; z-index: 1; padding: calc(var(--u) * 4) calc(var(--u) * 4) calc(var(--u) * 8); color: #fff; }
.scan-bar .primary { color: #fff; }

.toast {
  position: fixed; left: 50%; bottom: calc(var(--bar) + var(--safe-bottom) + calc(var(--u) * 3)); transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.78); color: #fff; padding: calc(var(--u) * 2.4) calc(var(--u) * 4); border-radius: 999px;
  max-width: calc(100% - calc(var(--u) * 8)); z-index: 30; font-size: calc(var(--u) * 3.4);
}