/* ---------- Concert chrome ---------- */
body.is-concert .concert { pointer-events: auto; }
.concert__close {
  position: absolute;
  top: max(18px, env(safe-area-inset-top));
  right: var(--gutter);
  z-index: 3;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg-2);
  background: rgba(10, 9, 14, .7);
  transition: color .3s, border-color .3s;
}
.concert__close:hover { color: var(--red); border-color: rgba(var(--red-rgb), .6); }

.concert__lyrics-cta {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 12px;
  max-width: 440px;
  margin: 28px auto 0;
  padding: 0 16px;
  text-align: center;
}
.concert__lyrics-cta .mono { color: var(--red); font-size: 10px; }
.concert__lyrics-note { color: var(--muted); font-size: 13px; line-height: 1.55; }
.concert__lyrics-note b { color: var(--fg-2); font-weight: 600; }

/* ---------- Karaoke ---------- */
.karaoke {
  position: absolute;
  inset: 0;
  display: none;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, transparent 12%, #000 34%, #000 74%, transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0, transparent 12%, #000 34%, #000 74%, transparent 100%);
}
.concert.has-lyrics .karaoke { display: block; }
.concert.has-lyrics .concert__lyrics-cta,
.concert.has-lyrics .concert__hint { display: none; }
.concert.has-lyrics .concert__scope { opacity: .32; }
.concert.has-lyrics .concert__title {
  position: absolute;
  top: max(22px, env(safe-area-inset-top));
  left: var(--gutter);
  font-size: 30px;
  color: var(--red);
  -webkit-text-stroke: 0;
  text-shadow: none;
  transform: none;
}
.concert.has-lyrics .concert__meta {
  position: absolute;
  top: max(64px, calc(env(safe-area-inset-top) + 44px));
  left: var(--gutter);
  font-size: 10px;
}

.karaoke__lines {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  width: min(100% - var(--gutter) * 2, 1100px);
  margin: 0 auto;
  text-align: left;
  transform: translate3d(0, 40vh, 0);
  transition: transform .75s cubic-bezier(.22, .9, .25, 1);
  will-change: transform;
}

.kl {
  margin: 0 0 .42em;
  font-family: var(--f-body);
  font-weight: 800;
  font-size: clamp(30px, 4.6vw, 66px);
  line-height: 1.16;
  letter-spacing: -.025em;
  color: rgba(242, 238, 233, .9);
  opacity: .22;
  transform-origin: 0 50%;
  transform: scale(.94);
  transition: opacity .5s ease, transform .6s cubic-bezier(.22, .9, .25, 1);
  cursor: pointer;
}
.kl:hover { opacity: .6; }
.kl.is-past { opacity: .4; transform: scale(.94); }
.kl.is-next { opacity: .5; }
.kl.is-active { opacity: 1; transform: scale(calc(1 + var(--beat) * .018)); }

/* word fill: a two-tone gradient slid under clipped text */
.kw {
  --f: 0;
  background: linear-gradient(90deg, #fff 0 47%, rgba(242, 238, 233, .34) 53% 100%);
  background-size: 200% 100%;
  background-position: calc((1 - var(--f)) * 100%) 0;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.kl.is-past .kw { --f: 1; }
.kl.is-active .kw { text-shadow: none; }
.kl.is-active {
  filter: drop-shadow(0 0 18px rgba(var(--red-rgb), calc(.15 + var(--beat) * .45)));
}

/* instrumental breaks */
.kl--gap { display: flex; gap: .32em; height: 1.16em; align-items: center; }
.kl--gap i {
  width: .3em;
  height: .3em;
  border-radius: 50%;
  background: #fff;
  opacity: .3;
  transform: scale(.7);
  transition: opacity .3s, transform .3s;
}
.kl--gap.is-active i:nth-child(1) { opacity: calc(.3 + min(1, var(--f, 0) * 3) * .7); transform: scale(calc(.7 + min(1, var(--f, 0) * 3) * .3 + var(--beat) * .25)); }
.kl--gap.is-active i:nth-child(2) { opacity: calc(.3 + max(0, min(1, var(--f, 0) * 3 - 1)) * .7); transform: scale(calc(.7 + max(0, min(1, var(--f, 0) * 3 - 1)) * .3 + var(--beat) * .25)); }
.kl--gap.is-active i:nth-child(3) { opacity: calc(.3 + max(0, min(1, var(--f, 0) * 3 - 2)) * .7); transform: scale(calc(.7 + max(0, min(1, var(--f, 0) * 3 - 2)) * .3 + var(--beat) * .25)); }

/* marker mode (.txt -> .lrc) */
.concert.is-recording .kl { cursor: default; }
.concert.is-recording .kl.is-next { opacity: 1; transform: scale(1); }
.concert.is-recording .kl.is-next::before { content: "пробел ▸ "; color: var(--red); font-size: .4em; vertical-align: middle; letter-spacing: .1em; }
.concert.is-recording .kl.is-past .kw,
.concert.is-recording .kl.is-active .kw { --f: 1; }

/* scratch feedback on the name */
body.is-scratching .hero__name { color: var(--amber); transition: color .2s; }

@media (max-width: 720px) {
  .kl { font-size: clamp(26px, 7.4vw, 40px); }
  .concert.has-lyrics .concert__title { font-size: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .karaoke__lines, .kl { transition: none; }
}