:root {
  --bg: #0f1117;
  --panel: #171a23;
  --card: #1d2130;
  --border: #2a2f42;
  --text: #e6e9f2;
  --muted: #8a90a6;
  --accent: #4f8cff;
  --accent2: #35d0a0;
  --danger: #ff5c6c;
  --radius: 12px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--text);
  font-family: -apple-system, "PingFang SC", "Helvetica Neue", sans-serif;
  font-size: 14px; line-height: 1.5;
}
.app { max-width: 1200px; margin: 0 auto; padding: 16px 20px 60px; }

/* topbar */
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 14px 0 18px; }
.brand { display: flex; align-items: baseline; gap: 10px; }
.logo { color: var(--accent); font-size: 20px; }
.title { font-size: 20px; font-weight: 700; letter-spacing: .5px; }
.subtitle { color: var(--muted); font-size: 13px; }
.topbar-right { display: flex; gap: 10px; align-items: center; }
.badge { background: var(--card); border: 1px solid var(--border); padding: 4px 10px; border-radius: 20px; font-size: 12px; }
.badge.dim { color: var(--muted); }
.badge.ok { border-color: var(--accent2); color: var(--accent2); }

/* tabs */
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.tab {
  background: none; border: none; color: var(--muted); padding: 10px 18px;
  font-size: 15px; cursor: pointer; border-bottom: 2px solid transparent;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

/* panels */
.panel { display: none; }
.panel.active { display: block; }

/* cards */
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; margin-bottom: 18px;
}
.card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; flex-wrap: wrap; gap: 8px; }
.card-head h2 { font-size: 16px; }
.hint { color: var(--muted); font-size: 12px; }

/* controls */
.ctrl-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
label { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
select, input[type=number], input[type=text], input:not([type]) {
  background: var(--panel); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 10px; font-size: 13px; outline: none;
}
select:focus, input:focus { border-color: var(--accent); }
.btn {
  background: var(--panel); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 7px 14px; font-size: 13px; cursor: pointer; transition: .15s;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.1); }
.btn.small { padding: 3px 10px; font-size: 12px; }
.file-btn { cursor: pointer; }
.file-btn input { display: none; }

/* inference */
.infer-body { display: grid; grid-template-columns: 1fr 300px; gap: 16px; }
.infer-stage {
  min-height: 320px; border: 1px dashed var(--border); border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center; overflow: hidden; background: var(--panel);
  position: relative;
}
.infer-stage img, .infer-stage video { max-width: 100%; max-height: 520px; display: block; }
.placeholder { color: var(--muted); text-align: center; line-height: 2; }
.infer-side h3 { font-size: 14px; margin: 12px 0 8px; }
.stats { display: flex; gap: 10px; }
.stat {
  flex: 1; background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px; text-align: center;
}
.stat b { display: block; font-size: 20px; color: var(--accent2); }
.stat span { font-size: 12px; color: var(--muted); }
.det-list { list-style: none; max-height: 300px; overflow-y: auto; }
.det-list li {
  display: flex; justify-content: space-between; padding: 6px 10px; border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.det-list li .cls { color: var(--accent); font-weight: 600; }
.det-list li .conf { color: var(--muted); }
.muted { color: var(--muted); }
.center { text-align: center; }

.video-progress { margin-top: 12px; display: flex; align-items: center; gap: 12px; }
.bar { flex: 1; height: 8px; background: var(--panel); border-radius: 4px; overflow: hidden; }
.bar-inner { height: 100%; width: 0; background: var(--accent); transition: width .3s; }

/* camera */
.cam-row { display: flex; gap: 16px; align-items: center; margin-bottom: 10px; }
.cam-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cam-wrap video { width: 100%; border-radius: 8px; background: #000; }
.cam-out img { width: 100%; border-radius: 8px; background: #000; }

/* train table */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 13px; }
.table th { color: var(--muted); font-weight: 500; }
.table tr.clickable { cursor: pointer; }
.table tr.clickable:hover { background: var(--panel); }

.curve-tools { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-bottom: 10px; }
.curve-tools label { font-size: 12px; cursor: pointer; }

.artifact-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.artifact-grid img { width: 100%; border-radius: 8px; border: 1px solid var(--border); cursor: pointer; }
.artifact-grid .art-name { font-size: 12px; color: var(--muted); text-align: center; margin-top: 4px; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; align-items: end; margin-bottom: 14px; }
.form-grid label { flex-direction: column; align-items: stretch; gap: 4px; }
.form-grid input { width: 100%; }
.log-box { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.log-head { padding: 8px 12px; background: var(--panel); display: flex; justify-content: space-between; align-items: center; font-size: 13px; }
.log-content { padding: 12px; font-size: 12px; font-family: Menlo, monospace; color: #a9d3ff; max-height: 260px; overflow-y: auto; white-space: pre-wrap; word-break: break-all; }

/* dataset */
#dataset-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.ds-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 14px; cursor: pointer; transition: .15s;
}
.ds-card:hover { border-color: var(--accent); }
.ds-card h3 { font-size: 15px; margin-bottom: 6px; }
.ds-card .meta { font-size: 12px; color: var(--muted); display: flex; gap: 12px; }
.img-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px; }
.img-grid .img-item { position: relative; cursor: pointer; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.img-grid .img-item img { width: 100%; height: 130px; object-fit: cover; display: block; }
.img-grid .img-item .tag { position: absolute; bottom: 0; left: 0; right: 0; background: rgba(0,0,0,.7); color: #fff; font-size: 11px; padding: 2px 6px; }
.detail-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 16px; }
.detail-row img { width: 100%; border-radius: 8px; }
.detail-info pre { background: var(--panel); padding: 10px; border-radius: 8px; font-size: 12px; max-height: 300px; overflow: auto; }

@media (max-width: 860px) {
  .infer-body { grid-template-columns: 1fr; }
  .cam-wrap, .detail-row { grid-template-columns: 1fr; }
}