/* CSS */
.fb-audio-card{
  --bg:#fff;
  --ink:#152033;
  --muted:#6a7488;
  --line:rgba(20,30,50,.10);
  --shadow:0 18px 60px rgba(20,30,50,.12);
  --radius:18px;
  --accent:#d81f26;

  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:
    radial-gradient(900px 300px at 85% 15%, rgba(216,31,38,.10), transparent 65%),
    radial-gradient(700px 260px at 10% 45%, rgba(50,110,255,.08), transparent 60%),
    var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  max-width: 820px;
}

.fb-audio-header{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 14px;
  margin-bottom: 10px;
}

.fb-audio-h1{
  font-weight: 900;
  letter-spacing: .02em;
  font-size: 34px;
  line-height: 1.05;
  color: var(--ink);
}

.fb-audio-h2{
  margin-top: 6px;
  font-size: 18px;
  color: var(--muted);
  font-weight: 700;
}

.fb-audio-icon{
  width: 48px;
  height: 48px;
  border-radius: 999px;
  background: rgba(255,255,255,.75);
  border: 1px solid var(--line);
  box-shadow: 0 10px 26px rgba(20,30,50,.10);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size: 22px;
}

.fb-wave-wrap{
  background: rgba(255,255,255,.65);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  box-shadow: 0 10px 26px rgba(20,30,50,.08);
}

.fb-wave{
  width:100%;
  display:block;
}

.fb-time-row{
  display:flex;
  align-items:center;
  gap: 12px;
  margin-top: 12px;
}

.fb-time{
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  font-weight: 800;
  font-size: 14px;
  min-width: 44px;
}

.fb-seek{
  width:100%;
  -webkit-appearance:none;
  appearance:none;
  height: 8px;
  border-radius: 999px;
  background: rgba(20,30,50,.10);
  outline: none;
  cursor: pointer;
}
.fb-seek::-webkit-slider-thumb{
  -webkit-appearance:none;
  appearance:none;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 10px 22px rgba(216,31,38,.25);
  border: 3px solid #fff;
}
.fb-seek::-moz-range-thumb{
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--accent);
  border: 3px solid #fff;
}

.fb-controls{
  display:flex;
  align-items:center;
  gap: 12px;
  margin-top: 14px;
}

.fb-spacer{ flex: 1 1 auto; }

.fb-btn{
  border: 1px solid var(--line);
  background: rgba(255,255,255,.75);
  color: var(--ink);
  border-radius: 14px;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 900;
  box-shadow: 0 10px 26px rgba(20,30,50,.10);
  transition: transform .08s ease, box-shadow .12s ease, background .12s ease;
  user-select:none;
}
.fb-btn:active{ transform: translateY(1px); }
.fb-btn:hover{ background:#fff; box-shadow: 0 14px 34px rgba(20,30,50,.14); }

.fb-btn-play{
  border: 0;
  background: linear-gradient(180deg, #ff3a3f, var(--accent));
  color:#fff;
  padding: 14px 18px;
  border-radius: 16px;
  box-shadow: 0 16px 40px rgba(216,31,38,.25);
  min-width: 78px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
}
.fb-btn-play:hover{ box-shadow: 0 18px 48px rgba(216,31,38,.32); }

.fb-btn-soft{
  width: 52px;
  height: 52px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding: 0;
}

.fb-download{
  text-decoration:none;
}

.fb-play{ display:inline; }
.fb-pause{ display:none; }

.fb-audio-card.is-playing .fb-play{ display:none; }
.fb-audio-card.is-playing .fb-pause{ display:inline; }

.fb-filename{
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  word-break: break-word;
}

@media (max-width: 620px){
  .fb-audio-h1{ font-size: 28px; }
  .fb-audio-h2{ font-size: 16px; }
  .fb-controls{ gap: 10px; flex-wrap: wrap; }
  .fb-spacer{ display:none; }
}