/* ==========================================================================
   COMPONENTS
   ========================================================================== */

/* ---------- Glass surface ---------- */
.glass {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-brd);
  border-radius: var(--r-lg);
  box-shadow: var(--glass-shadow);
  -webkit-backdrop-filter: blur(18px) saturate(1.15);
  backdrop-filter: blur(18px) saturate(1.15);
  overflow: hidden;
}

/* Glass reflection sweep */
.glass::before {
  content: "";
  position: absolute;
  top: 0; left: -30%;
  width: 45%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,0.55), transparent);
  transform: skewX(-14deg);
  opacity: 0;
  transition: opacity 0.8s var(--ease-silk), left 1.1s var(--ease-silk);
  pointer-events: none;
}
.glass:hover::before { opacity: 1; left: 110%; }

/* ---------- Detail card ---------- */
.card {
  --card-pad: clamp(1.6rem, 1.2rem + 2vw, 3rem);
  position: relative;
  padding: var(--card-pad);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(251,249,245,0.86), rgba(245,241,234,0.7));
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px -46px rgba(46,46,46,0.55);
  transition:
    transform 0.75s var(--ease-lift),
    box-shadow 0.75s var(--ease-lift),
    border-color 0.75s var(--ease-lift);
  overflow: hidden;
  isolation: isolate;
}

/* Animated hairline border that traces on hover */
/* An <svg> is a replaced element, so `inset` alone will not stretch it — it
   falls back to its intrinsic 150px height. Size and geometry are set from
   reveal.js instead, which also keeps the trace length honest. */
.card__frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  z-index: 2;
}
.card__frame rect {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1;
  stroke-dasharray: var(--len, 1600);
  stroke-dashoffset: var(--len, 1600);
  opacity: 0.75;
  transition: stroke-dashoffset 1.6s var(--ease-silk);
}
.card:hover .card__frame rect,
.card:focus-within .card__frame rect { stroke-dashoffset: 0; }

.card::after { /* soft glow pooled at the base */
  content: "";
  position: absolute;
  inset: auto -20% -60% -20%;
  height: 70%;
  background: radial-gradient(60% 100% at 50% 100%, rgba(168,184,165,0.42), transparent 70%);
  opacity: 0;
  transition: opacity 0.8s var(--ease-silk);
  z-index: -1;
}
.card:hover { transform: translateY(-10px); border-color: var(--line-gold); }
.card:hover::after { opacity: 1; }

.card__photo {
  margin: calc(-1 * var(--card-pad)) calc(-1 * var(--card-pad)) 1.8rem;
  aspect-ratio: 16 / 10;
  border-radius: 0;
}

.card__icon {
  width: 34px; height: 34px;
  color: var(--olive);
  margin-bottom: 1.6rem;
}
.card__label {
  font-size: var(--fs-mono);
  text-transform: uppercase;
  letter-spacing: var(--track-wide);
  color: var(--ink-faint);
  display: block;
  margin-bottom: 0.9rem;
}
.card__title {
  font-size: var(--fs-h3);
  margin-bottom: 0.7rem;
}
.card__meta {
  color: var(--ink-soft);
  font-size: 0.94rem;
  line-height: 1.75;
}
.card__time {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-style: italic;
  color: var(--neptune);
  margin: 1.4rem 0 1.8rem;
}
.card__rule {
  height: 1px;
  background: linear-gradient(90deg, var(--line-gold), transparent);
  margin: 1.6rem 0;
}

/* ---------- Music: typographic, no icon ----------
   The whole card is the button, and the state is carried by the label rather
   than by a glyph. A hairline under the title fills with the track. */
.player {
  position: fixed;
  left: clamp(1rem, 2.5vw, 2.4rem);
  bottom: clamp(1rem, 2.5vw, 2.4rem);
  z-index: 500;

  display: grid;
  justify-items: start;
  gap: 0.28rem;
  min-width: min(58vw, 188px);
  max-width: min(74vw, 250px);
  padding: 0.85rem 1.4rem 0.95rem;

  border: 1px solid var(--glass-brd);
  border-radius: var(--r-md);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
          backdrop-filter: blur(16px) saturate(1.2);
  box-shadow: 0 20px 50px -34px rgba(46, 46, 46, 0.7);

  font: inherit;
  text-align: left;
  cursor: pointer;
  -webkit-appearance: none;
          appearance: none;

  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 1s var(--ease-silk),
    transform 1s var(--ease-silk),
    border-color 0.5s var(--ease-silk);
}
.player.is-ready { opacity: 1; transform: none; }
.player:hover { border-color: var(--line-gold); }

.player__state {
  font-family: var(--font-body);
  font-size: 0.52rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.26em;
  text-indent: 0.26em;
  color: var(--olive);
  transition: color 0.4s var(--ease-silk);
}
.player:not(.is-playing) .player__state { color: var(--ink-faint); }

.player__song {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 1.2rem;
  line-height: 1.15;
  color: var(--charcoal);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.player__artist {
  font-family: var(--font-body);
  font-size: 0.52rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  text-indent: 0.22em;
  color: var(--ink-faint);
}

.player__line {
  justify-self: stretch;
  height: 1px;
  margin-top: 0.7rem;
  background: var(--line);
  overflow: hidden;
}
.player__line i {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--gold);
  /* short, so it tracks the audio rather than lagging behind it */
  transition: width 0.28s linear;
}

@media (max-width: 640px) {
  .player {
    padding: 0.7rem 1.1rem 0.8rem;
    min-width: 0;
    max-width: 62vw;
  }
  .player__song { font-size: 1.05rem; }
  .player__artist { display: none; }
}