:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --line: #e3e6ea;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #2563eb;
  --ok: #16a34a;
  --err: #dc2626;
  --warn: #d97706;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

header {
  padding: 28px 20px 8px;
  text-align: center;
}
header h1 { margin: 0; font-size: 26px; }
.sub { color: var(--muted); margin: 6px 0 0; }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .04);
}
.card h2 { margin: 0 0 12px; font-size: 17px; }
.hidden { display: none; }

.upload-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
input[type="file"] { flex: 1; min-width: 220px; }
.settings-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
  flex-wrap: wrap;
}
.settings-row label { color: var(--muted); font-size: 13px; }
.settings-row input {
  flex: 1;
  min-width: 220px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
}
.settings-row button {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  padding: 8px 14px;
}
button {
  background: var(--primary);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 9px 18px;
  font-size: 14px;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }
button:disabled { opacity: .55; cursor: default; }
.hint { color: var(--muted); font-size: 13px; margin: 10px 0 0; }
.msg { margin-top: 10px; font-size: 14px; min-height: 18px; }
.msg.err { color: var(--err); }
.msg.ok { color: var(--ok); }
.empty { color: var(--muted); }

.job-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 8px;
  cursor: pointer;
}
.job-item:hover { background: #f8fafc; }
.job-item.selected { border-color: var(--primary); background: #eff6ff; }
.job-item .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.job-item .time { color: var(--muted); font-size: 12px; }
.job-item .del {
  background: transparent;
  color: var(--muted);
  padding: 4px 8px;
  border: 1px solid var(--line);
}
.job-item .del:hover { color: var(--err); border-color: var(--err); background: #fef2f2; }

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  white-space: nowrap;
}
.badge.queued { background: #fef3c7; color: var(--warn); }
.badge.running { background: #dbeafe; color: var(--primary); }
.badge.done { background: #dcfce7; color: var(--ok); }
.badge.failed { background: #fee2e2; color: var(--err); }

.progress-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
  margin: 10px 0 6px;
}
.progress-bar .fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--primary), #60a5fa);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 16px; }
.chip {
  background: #f1f5f9;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
}
.chip b { color: var(--primary); }

.stem-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.stem {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.stem .stem-name { font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.stem audio { width: 100%; height: 34px; }
.stem .meta { color: var(--muted); font-size: 12px; }
.stem .stem-links { display: flex; gap: 14px; flex-wrap: wrap; }
.stem .stem-links a { color: var(--primary); font-size: 13px; text-decoration: none; }
.stem .stem-links a:hover { text-decoration: underline; }
.stem.absent { border-style: dashed; opacity: .8; }

.notes { color: var(--muted); font-size: 13px; margin-top: 14px; line-height: 1.7; }
.error-box {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--err);
  border-radius: 8px;
  padding: 10px 12px;
  margin-top: 10px;
  font-size: 14px;
}