.r32-audio-merge {
  --r32-signal: #0f766e;
  --r32-signal-soft: color-mix(in srgb, var(--r32-signal) 10%, transparent);
  display: grid;
  gap: 1rem;
  padding: clamp(1rem, 2.5vw, 1.5rem);
  border: 1px solid var(--line, #d9dce4);
  border-radius: 1rem;
  background: var(--panel, #fff);
}

[data-theme="dark"] .r32-audio-merge {
  --r32-signal: #74d5c8;
}

.r32-audio-merge__header,
.r32-audio-merge__workbench,
.r32-audio-merge__actions {
  display: flex;
  gap: 1rem;
}

.r32-audio-merge__header {
  align-items: flex-start;
  justify-content: space-between;
}

.r32-audio-merge__header h2,
.r32-audio-merge__result h3 {
  margin: 0;
}

.r32-audio-merge__header p {
  max-width: 44rem;
  margin: .45rem 0 0;
  color: var(--muted, #5e6574);
}

.r32-audio-merge__eyebrow {
  display: block;
  margin-bottom: .35rem;
  color: var(--r32-signal);
  font: 700 .72rem/1 var(--mono, ui-monospace, monospace);
  letter-spacing: .12em;
}

.r32-audio-merge__badge {
  flex: 0 0 auto;
  padding: .35rem .55rem;
  border: 1px solid color-mix(in srgb, var(--r32-signal) 35%, var(--line, #d9dce4));
  border-radius: 999px;
  color: var(--r32-signal);
  font: 700 .75rem/1 var(--mono, ui-monospace, monospace);
  white-space: nowrap;
}

.r32-audio-merge__workbench {
  align-items: stretch;
  flex-wrap: wrap;
}

.r32-audio-merge__panel {
  display: grid;
  flex: 1 1 30rem;
  min-width: 0;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--line, #d9dce4);
  border-radius: .85rem;
  background: var(--surface, #f7f8fb);
}

.r32-audio-merge__result {
  flex: .7 1 15rem;
  align-content: start;
}

.r32-audio-merge__dropzone {
  display: grid;
  gap: .35rem;
  padding: 1.1rem;
  border: 1px dashed color-mix(in srgb, var(--r32-signal) 60%, var(--line, #d9dce4));
  border-radius: .7rem;
  background: var(--r32-signal-soft);
  cursor: pointer;
}

.r32-audio-merge__dropzone > span {
  font-weight: 750;
}

.r32-audio-merge__dropzone small,
.r32-audio-merge__grid small,
.r32-audio-merge__file small {
  color: var(--muted, #5e6574);
}

.r32-audio-merge__dropzone input {
  max-width: 100%;
  margin-top: .35rem;
}

.r32-audio-merge__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(8rem, 1fr));
  gap: .75rem;
  align-items: start;
}

.r32-audio-merge__grid label,
.r32-audio-merge__grid fieldset {
  display: grid;
  gap: .35rem;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
  font-weight: 650;
}

.r32-audio-merge__grid fieldset label {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-weight: 500;
}

.r32-audio-merge__grid legend {
  margin-bottom: .35rem;
  font-weight: 650;
}

.r32-audio-merge__grid input,
.r32-audio-merge__grid select {
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  padding: .48rem .55rem;
  border: 1px solid var(--line, #d9dce4);
  border-radius: .45rem;
  background: var(--panel, #fff);
  color: inherit;
}

.r32-audio-merge__grid fieldset input {
  width: auto;
}

.r32-audio-merge__files {
  display: grid;
  gap: .5rem;
  min-height: 4rem;
  padding: .7rem;
  border: 1px solid var(--line, #d9dce4);
  border-radius: .6rem;
  background: var(--panel, #fff);
}

.r32-audio-merge__files > p,
.r32-audio-merge__result p {
  margin: 0;
  color: var(--muted, #5e6574);
}

.r32-audio-merge__file {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .75rem;
  align-items: baseline;
  padding: .45rem .55rem;
  border-bottom: 1px solid color-mix(in srgb, var(--line, #d9dce4) 72%, transparent);
}

.r32-audio-merge__file:last-child {
  border-bottom: 0;
}

.r32-audio-merge__file strong {
  min-width: 0;
  overflow-wrap: anywhere;
}

.r32-audio-merge__file small {
  font: .78rem/1.4 var(--mono, ui-monospace, monospace);
  white-space: nowrap;
}

.r32-audio-merge__actions {
  flex-wrap: wrap;
}

.r32-audio-merge__progress {
  overflow: hidden;
  height: .45rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--r32-signal) 12%, var(--line, #d9dce4));
}

.r32-audio-merge__progress span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--r32-signal);
  transition: width .16s ease;
}

.r32-audio-merge__status {
  min-height: 1.5rem;
  color: var(--muted, #5e6574);
}

.r32-audio-merge__status[data-tone="error"] {
  color: var(--danger, #b42318);
}

.r32-audio-merge__status[data-tone="success"] {
  color: var(--success, #067647);
}

@media (max-width: 760px) {
  .r32-audio-merge__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .r32-audio-merge__file {
    grid-template-columns: 1fr;
    gap: .15rem;
  }

  .r32-audio-merge__file small {
    white-space: normal;
  }
}

@media (max-width: 480px) {
  .r32-audio-merge__header,
  .r32-audio-merge__grid {
    display: grid;
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .r32-audio-merge__progress span {
    transition: none;
  }
}