:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --border: #e3e7ef;
  --text: #1c2330;
  --muted: #6b7686;
  --primary: #3457ff;
  --danger: #d84a4a;
  --ok: #2ea25a;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.5 "Segoe UI", "Microsoft YaHei", sans-serif; }
.page { max-width: 1280px; margin: 0 auto; padding: 16px; }

.topbar { display: flex; justify-content: space-between; align-items: center; padding: 12px 4px; }
.brand { font-size: 20px; font-weight: 700; }
.brand .sub { font-size: 12px; font-weight: 400; color: var(--muted); margin-left: 8px; }
.admin-link { color: var(--primary); text-decoration: none; font-size: 13px; }

.layout { display: grid; grid-template-columns: 240px 1fr 320px; gap: 16px; align-items: start; }
@media (max-width: 980px) { .layout { grid-template-columns: 1fr; } }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; margin-bottom: 16px; }
.panel h3 { margin: 0 0 8px; font-size: 15px; }
.panel .hint { color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.hint-panel { color: var(--muted); }

.left-col, .right-col { display: flex; flex-direction: column; }

.preset-item { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: 13px; }
.save-row { display: flex; gap: 6px; margin-bottom: 8px; }
.save-row input { flex: 1; }

.btn { border: 1px solid var(--border); background: #fff; color: var(--text); border-radius: 6px; padding: 6px 12px; cursor: pointer; font-size: 13px; margin-bottom: 6px; }
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { opacity: .9; color: #fff; }
.btn.danger { color: var(--danger); border-color: #f0caca; }
.btn.sm { padding: 3px 8px; font-size: 12px; margin-left: 4px; }
.btn.big { width: 100%; padding: 12px; font-size: 15px; }
.file-btn { display: inline-block; }
.file-btn input { display: none; }

input, select { border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px; font-size: 13px; width: 100%; background: #fff; color: var(--text); }
select { cursor: pointer; }
input[type="checkbox"] { width: auto; }
input[type="range"] { padding: 0; }
.num { width: 80px; }

.slider-row { margin-bottom: 10px; }
.slider-row label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; font-size: 13px; }
.row select { width: auto; flex: none; }
.row.wrap { flex-wrap: wrap; }
.switch { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; cursor: pointer; }

.connect-panel { text-align: center; padding: 28px 16px; }
.detect-box { padding: 6px 0; }
.detect-title { font-size: 15px; font-weight: 600; margin-bottom: 12px; }
.detect-actions { display: flex; gap: 10px; justify-content: center; }
.detect-actions .btn { margin-bottom: 0; }
.device-info { text-align: left; }
.dev-title { font-size: 18px; font-weight: 700; }
.dev-meta { color: var(--muted); font-size: 12px; margin: 6px 0; }
.caps { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.cap { border: 1px solid var(--ok); color: var(--ok); border-radius: 4px; font-size: 11px; padding: 2px 6px; }
.cap.off { border-color: var(--border); color: var(--muted); text-decoration: line-through; }
.dev-actions { margin-top: 8px; }

.warn-box { background: #fff7e6; border: 1px solid #f0d9a8; color: #8a6d1f; border-radius: 6px; padding: 8px 10px; font-size: 12px; margin-top: 12px; text-align: left; }
.device-bar { display: flex; align-items: center; gap: 10px; padding: 8px 4px 12px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.device-bar .cap { font-size: 11px; padding: 1px 5px; }
.edit-target { background: #eef2ff; border: 1px solid #c7d2ff; color: var(--primary); border-radius: 6px; padding: 8px 12px; font-size: 13px; font-weight: 600; margin-bottom: 12px; }
.mono-line { font-family: Consolas, monospace; font-size: 12px; }
input.ro { background: #f0f2f6; color: var(--muted); }
.proto-info { font-size: 12px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }
.proto-info .ok { color: var(--ok); font-weight: 600; }
.proto-info .warn { color: #c98a1d; font-weight: 600; }
.guide { margin: 0; font-size: 12px; }
.guide dt { color: var(--text); font-weight: 600; margin-top: 8px; }
.guide dd { margin: 2px 0 0; color: var(--muted); }
.apply-bar .btn { margin-bottom: 6px; }
.error { color: var(--danger); font-size: 13px; padding: 6px 0; }
.ok-msg { color: var(--ok); font-size: 13px; padding: 6px 0; }

.apply-bar { position: sticky; bottom: 12px; }
.apply-bar .btn { margin-bottom: 0; }

.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 10px 0; }
.form-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.form-grid label.wide { grid-column: 1 / -1; }

.tbl { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 13px; }
.tbl th, .tbl td { border-bottom: 1px solid var(--border); padding: 6px 8px; text-align: left; }
.tbl th { color: var(--muted); font-weight: 600; font-size: 12px; }
.mono { font-family: Consolas, monospace; font-size: 12px; }

.stat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.stat { background: var(--bg); border-radius: 8px; padding: 14px; text-align: center; }
.stat b { display: block; font-size: 24px; }
.stat span { color: var(--muted); font-size: 12px; }

.login-panel { max-width: 360px; margin: 60px auto; }
.login-panel input { margin-bottom: 10px; }

.tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.tab { border: 1px solid var(--border); background: #fff; border-radius: 6px; padding: 6px 14px; cursor: pointer; font-size: 13px; }
.tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }