:root {
  --bg: #0f1419;
  --fg: #e7ecf1;
  --muted: #8b98a5;
  --accent: #3d9cfd;
  --card: #1a222c;
  --border: #2a3542;
  font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 10% -10%, #1c3a5a 0%, transparent 55%),
    var(--bg);
  color: var(--fg);
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

h1 {
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}
h1 span { color: var(--accent); font-weight: 500; }

.lede {
  color: var(--muted);
  line-height: 1.45;
  margin: 0 0 1.75rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

input {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  padding: 0.65rem 0.75rem;
  font: inherit;
}

.row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.actions {
  display: flex;
  gap: 0.75rem;
  margin: 0.5rem 0 1.25rem;
}

button {
  background: var(--accent);
  color: #041018;
  border: 0;
  border-radius: 8px;
  padding: 0.7rem 1.1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
button#btn-load {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
}

.progress-wrap {
  margin: 0 0 1rem;
}

.progress-track {
  height: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.12s linear;
}

.progress-label {
  margin-top: 0.4rem;
  font-size: 0.78rem;
  color: var(--muted);
}

#log {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  min-height: 7rem;
  font-size: 0.78rem;
  line-height: 1.4;
  white-space: pre-wrap;
  overflow: auto;
  color: #b7c4d0;
}

audio {
  width: 100%;
  margin-top: 1rem;
}

@media (max-width: 560px) {
  .row { grid-template-columns: 1fr; }
}