:root {
  --bg: #050505;
  --bg-soft: #0b0b0b;
  --card: #0f0f0f;
  --line: #222;
  --line-strong: #2d2d2d;
  --text: #f1f1f1;
  --muted: #a0a0a0;
  --accent: #f5f5f5;
  --control-height: 2.45rem;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font: 15px/1.45 "IBM Plex Mono", "JetBrains Mono", "Consolas", monospace;
  color: var(--text);
  background:
    radial-gradient(90rem 40rem at 85% -10%, #171717 0%, transparent 55%),
    radial-gradient(80rem 36rem at -10% 120%, #121212 0%, transparent 52%),
    var(--bg);
}

.shell {
  width: min(960px, 100%);
  margin: 2rem auto;
  padding: 0 1rem;
}

.panel {
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, #111 0%, #0d0d0d 100%);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.42);
}

h1 {
  margin: 0;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.subhead {
  margin: 0.5rem 0 1rem;
  color: var(--muted);
  max-width: 58ch;
}

.grid,
.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  align-items: stretch;
}

.controls {
  margin-top: 0.75rem;
}

.field {
  display: grid;
  gap: 0.45rem;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  border-radius: 10px;
  padding: 0.72rem;
}

.grid > .field {
  min-height: 8.1rem;
}

.field > span,
label > span {
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

input[type="file"],
input[type="range"] {
  width: 100%;
}

input[type="file"] {
  border: 1px dashed #333;
  background: #0a0a0a;
  border-radius: 8px;
  color: var(--muted);
  padding: 0.45rem;
  font: inherit;
  font-size: 1rem;
  line-height: 1.45;
  appearance: none;
  -webkit-appearance: none;
}

input[type="file"]::file-selector-button {
  border: 1px solid #343434 !important;
  border-radius: 8px !important;
  padding: 0.56rem 0.72rem;
  min-height: var(--control-height);
  box-sizing: border-box;
  margin-right: 0.55rem;
  background: #141414 !important;
  color: var(--accent) !important;
  font-family: inherit !important;
  font-size: 1rem !important;
  font-weight: 400 !important;
  line-height: 1.2;
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color 120ms ease, transform 120ms ease, background 120ms ease;
}

input[type="file"]::file-selector-button:hover {
  border-color: #5a5a5a;
  background: #191919;
  transform: translateY(-1px);
}

input[type="file"]::-webkit-file-upload-button {
  border: 1px solid #343434 !important;
  border-radius: 8px !important;
  padding: 0.56rem 0.72rem;
  min-height: var(--control-height);
  box-sizing: border-box;
  margin-right: 0.55rem;
  background: #141414 !important;
  color: var(--accent) !important;
  font-family: inherit !important;
  font-size: 1rem !important;
  font-weight: 400 !important;
  line-height: 1.2;
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color 120ms ease, transform 120ms ease, background 120ms ease;
}

input[type="file"]::-webkit-file-upload-button:hover {
  border-color: #5a5a5a;
  background: #191919;
  transform: translateY(-1px);
}

input[type="file"]:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

input[type="file"]:disabled::file-selector-button,
input[type="file"]:disabled::-webkit-file-upload-button {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

input[type="range"] {
  accent-color: #ffffff;
}

.recorder .row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.file-field input[type="file"] {
  align-self: center;
}

.actions {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
}

.action-group {
  border: 1px solid var(--line);
  background: var(--bg-soft);
  border-radius: 10px;
  padding: 0.6rem;
}

.group-title {
  margin: 0 0 0.45rem;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.group-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: end;
}

.export-controls {
  justify-content: flex-start;
  align-items: center;
}

button {
  border: 1px solid #343434;
  border-radius: 8px;
  padding: 0.56rem 0.72rem;
  background: #141414;
  color: var(--accent);
  font: inherit;
  min-height: var(--control-height);
  line-height: 1.2;
  cursor: pointer;
  transition: border-color 120ms ease, transform 120ms ease, background 120ms ease;
}

button:hover:not(:disabled) {
  border-color: #5a5a5a;
  background: #191919;
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.compact-input {
  min-width: 150px;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.compact-input input[type="number"] {
  width: 86px;
  min-height: var(--control-height);
  border: 1px solid #333;
  background: #0a0a0a;
  color: var(--text);
  border-radius: 6px;
  font: inherit;
  padding: 0.48rem 0.45rem;
  appearance: textfield;
  -moz-appearance: textfield;
}

.compact-input input[type="number"]::-webkit-outer-spin-button,
.compact-input input[type="number"]::-webkit-inner-spin-button {
  margin: 0;
  -webkit-appearance: none;
}

.compact-input span {
  white-space: nowrap;
}

output {
  color: var(--text);
}

.profile {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

.progress-wrap {
  margin-top: 0.6rem;
}

.progress-track {
  height: 8px;
  width: 100%;
  border-radius: 999px;
  border: 1px solid #2f2f2f;
  background: #0a0a0a;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #f0f0f0 0%, #b9b9b9 100%);
  transition: width 140ms linear;
}

.progress-label {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

@media (max-width: 760px) {
  .grid,
  .controls,
  .actions {
    grid-template-columns: 1fr;
  }
}