* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: #f8fafc;
}

.container {
  width: min(640px, 92vw);
  background: #1e293b;
  border-radius: 12px;
  padding: 24px;
}

form {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

input,
select,
button {
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #475569;
  font-size: 16px;
}

input {
  background: #0f172a;
  color: #f8fafc;
}

select {
  background: #0f172a;
  color: #f8fafc;
}

button {
  background: #2563eb;
  border: none;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#status {
  min-height: 24px;
  margin-top: 16px;
}

.hidden {
  display: none;
}

#progressSection {
  margin-top: 16px;
}

.progressMeta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 14px;
  color: #cbd5e1;
}

.progressTrack {
  width: 100%;
  height: 12px;
  background: #334155;
  border-radius: 999px;
  overflow: hidden;
}

.progressFill {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #22c55e, #06b6d4);
  transition: width 0.35s ease;
}

#outputPreview {
  margin-top: 10px;
  font-size: 14px;
  color: #cbd5e1;
}