* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #e2e8f0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

.app {
  max-width: 980px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

h1 {
  text-align: center;
  margin: 0 0 8px;
  font-size: 2rem;
}

.subtitle {
  text-align: center;
  color: #94a3b8;
  margin: 0 0 32px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

.card {
  background: rgba(30, 41, 59, 0.72);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 16px;
  padding: 20px;
  backdrop-filter: blur(8px);
}

.card h2 {
  margin: 0 0 16px;
  font-size: 1.15rem;
}

.field {
  margin-bottom: 14px;
}

label {
  display: block;
  margin-bottom: 6px;
  color: #cbd5e1;
  font-size: 0.9rem;
}

.row {
  display: flex;
  gap: 8px;
}

input[type='text'],
select {
  flex: 1;
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #334155;
  background: #0f172a;
  color: #f1f5f9;
  font-size: 0.95rem;
  outline: none;
}

input[type='text']:focus,
select:focus {
  border-color: #38bdf8;
}

button {
  padding: 10px 16px;
  border: 1px solid #334155;
  border-radius: 10px;
  background: #1e293b;
  color: #e2e8f0;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

button:hover:not(:disabled) {
  background: #334155;
  border-color: #475569;
}

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

button.primary {
  background: #0284c7;
  border-color: #0284c7;
  color: white;
}

button.primary:hover:not(:disabled) {
  background: #0369a1;
  border-color: #0369a1;
}

.mode-note {
  margin: 0;
  padding: 10px 12px;
  background: #0f172a;
  border: 1px solid #1e293b;
  border-radius: 10px;
  color: #7dd3fc;
  font-size: 0.88rem;
  line-height: 1.5;
}

.actions {
  display: flex;
  gap: 8px;
  margin: 16px 0;
  flex-wrap: wrap;
}

.status-box {
  background: #0f172a;
  border: 1px solid #1e293b;
  border-radius: 10px;
  padding: 10px 12px;
  margin: 10px 0;
  font-size: 0.88rem;
  color: #cbd5e1;
  word-break: break-all;
}

.status-box.ok {
  border-color: #22c55e;
  color: #86efac;
}

.status-box.warn {
  border-color: #eab308;
  color: #fde047;
}

.status-box.err {
  border-color: #ef4444;
  color: #fca5a5;
}

.meter {
  margin-top: 12px;
}

.meter-label {
  font-size: 0.82rem;
  color: #94a3b8;
  margin-bottom: 5px;
}

.meter-track {
  height: 10px;
  background: #0f172a;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid #1e293b;
}

.meter-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #22c55e, #eab308);
  transition: width 80ms linear;
}

audio {
  display: none;
}

.tips {
  margin-top: 20px;
}

.tips ul {
  margin: 0;
  padding-left: 20px;
  line-height: 1.8;
  color: #cbd5e1;
}