:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #667085;
  --line: #d9e0ea;
  --accent: #0f7b6c;
  --accent-dark: #0b6257;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
}

.shell {
  width: min(1040px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.toolbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 22px;
}

h1 {
  margin: 0;
  font-size: 32px;
  line-height: 1.2;
}

.subtitle {
  margin: 8px 0 0;
  color: var(--muted);
}

.convert-form,
.status-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
}

.convert-form label {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 14px;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 132px;
  gap: 12px;
}

input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 12px;
  font-size: 15px;
  outline: none;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 123, 108, 0.12);
}

button,
.download {
  min-height: 44px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

button:hover,
.download:hover {
  background: var(--accent-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.56;
}

.status-panel {
  margin-top: 16px;
}

.status-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--muted);
}

.dot.running {
  background: #b7791f;
}

.dot.done {
  background: var(--accent);
}

.dot.failed {
  background: var(--danger);
}

pre {
  min-height: 180px;
  max-height: 420px;
  overflow: auto;
  margin: 0;
  padding: 14px;
  border-radius: 6px;
  background: #111827;
  color: #e5e7eb;
  white-space: pre-wrap;
  font: 13px/1.5 Consolas, "Microsoft YaHei", monospace;
}

.download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 14px;
  padding: 0 18px;
  text-decoration: none;
}

.hidden {
  display: none;
}

@media (max-width: 720px) {
  .input-row {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 26px;
  }
}