.aivs-shell {
  --aivs-border: #d9dde4;
  --aivs-muted: #667085;
  --aivs-bg: #ffffff;
  --aivs-soft: #f7f8fa;
  --aivs-text: #111827;
  max-width: 860px;
  margin: 28px auto;
  padding: 28px;
  border: 1px solid var(--aivs-border);
  border-radius: 22px;
  background: var(--aivs-bg);
  color: var(--aivs-text);
  box-shadow: 0 16px 48px rgba(17, 24, 39, .08);
  font-family: inherit;
}

.aivs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.aivs-header h2 {
  margin: 0 0 6px;
  font-size: clamp(1.65rem, 4vw, 2.25rem);
  line-height: 1.1;
}

.aivs-header p {
  margin: 0;
  color: var(--aivs-muted);
}

.aivs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.aivs-field {
  display: block;
  margin-bottom: 16px;
}

.aivs-field > span {
  display: block;
  margin-bottom: 7px;
  font-size: .92rem;
  font-weight: 700;
}

.aivs-field textarea,
.aivs-field select,
.aivs-field input[type="range"] {
  width: 100%;
  box-sizing: border-box;
}

.aivs-field textarea,
.aivs-field select {
  border: 1px solid var(--aivs-border);
  border-radius: 12px;
  background: #fff;
  color: var(--aivs-text);
  padding: 12px 14px;
  font: inherit;
  outline: none;
}

.aivs-field textarea:focus,
.aivs-field select:focus {
  border-color: #98a2b3;
  box-shadow: 0 0 0 3px rgba(152, 162, 179, .16);
}

.aivs-speed-row {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
}

.aivs-speed-row output {
  min-width: 58px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.aivs-counter {
  display: block;
  margin-top: 6px;
  text-align: right;
  color: var(--aivs-muted);
}

.aivs-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.aivs-generate,
.aivs-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 12px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.aivs-generate {
  border: 0;
  background: #111827;
  color: #fff;
}

.aivs-generate:disabled {
  opacity: .55;
  cursor: wait;
}

.aivs-status {
  color: var(--aivs-muted);
}

.aivs-result {
  margin-top: 20px;
  padding: 16px;
  border-radius: 16px;
  background: var(--aivs-soft);
}

.aivs-result audio {
  display: block;
  width: 100%;
  margin-bottom: 12px;
}

.aivs-download {
  border: 1px solid var(--aivs-border);
  background: #fff;
  color: var(--aivs-text);
}

.aivs-disclosure {
  margin: 18px 0 0;
  color: var(--aivs-muted);
  font-size: .86rem;
}

@media (max-width: 640px) {
  .aivs-shell {
    margin: 16px auto;
    padding: 18px;
    border-radius: 16px;
  }

  .aivs-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
}