:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --border: #e5e7eb;
  --radius: 14px;
  --shadow: 0 6px 20px rgba(15, 23, 42, .08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --card: #1e293b;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --border: #334155;
    --shadow: 0 6px 20px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

.wrap { max-width: 620px; margin: 0 auto; padding: 16px 16px 40px; }

header.top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 14px 16px; background: var(--card);
  border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 20;
}
header.top h1 { font-size: 17px; margin: 0; font-weight: 700; letter-spacing: .3px; }
header.top .sub { font-size: 12px; color: var(--muted); font-weight: 400; }
.top-actions { display: flex; align-items: center; gap: 8px; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; margin-bottom: 14px; box-shadow: var(--shadow);
}
.card h2 { font-size: 14px; margin: 0 0 12px; color: var(--muted); font-weight: 600; display: flex; align-items: center; justify-content: space-between; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }

input[type=text], input[type=password], input[type=date], input[type=number], select, textarea {
  width: 100%; padding: 11px 12px; font-size: 16px; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, .15); }
textarea { resize: vertical; min-height: 62px; }

button {
  font-family: inherit; font-size: 15px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--card); color: var(--text); padding: 10px 14px; cursor: pointer;
  transition: filter .15s ease, opacity .15s ease;
}
button:active { filter: brightness(.94); }
button:disabled { opacity: .55; cursor: not-allowed; }
button.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
button.success { background: var(--success); border-color: var(--success); color: #fff; }
button.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
button.ghost { background: transparent; }
button.sm { padding: 6px 10px; font-size: 13px; }
button.block { width: 100%; }
/* 语言按钮处于"跟随系统"模式：虚线边框作区分 */
button.sm.auto { border-style: dashed; color: var(--primary); border-color: var(--primary); }

.big-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 4px; }
.big-btn { padding: 18px 10px; font-size: 17px; font-weight: 600; border-radius: var(--radius); }

.row { display: flex; gap: 10px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
@media (max-width: 520px) { .grid3 { grid-template-columns: 1fr 1fr; } }

.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; border: 1px solid var(--border); }
.badge.ok { color: var(--success); border-color: var(--success); }
.badge.warn { color: var(--warning); border-color: var(--warning); }
.badge.err { color: var(--danger); border-color: var(--danger); }
.badge.in { color: var(--primary); border-color: var(--primary); }

.kv { display: flex; justify-content: space-between; gap: 8px; padding: 6px 0; border-bottom: 1px dashed var(--border); }
.kv:last-child { border-bottom: none; }
.kv .k { color: var(--muted); font-size: 13px; }

.status-line { display: flex; align-items: center; gap: 8px; margin-top: 8px; font-size: 13.5px; }

.record-list { list-style: none; margin: 0; padding: 0; }
.record-list li { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px dashed var(--border); }
.record-list li:last-child { border-bottom: none; }

/* 摄像头弹层 */
.modal { position: fixed; inset: 0; background: rgba(15, 23, 42, .78); display: none; align-items: center; justify-content: center; z-index: 100; padding: 16px; }
.modal.show { display: flex; }
.modal-box { background: var(--card); border-radius: 16px; width: 100%; max-width: 460px; overflow: hidden; box-shadow: var(--shadow); }
.modal-head { padding: 14px 16px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; font-weight: 600; }
.modal-body { padding: 14px 16px; }
.modal-foot { padding: 12px 16px 16px; display: flex; gap: 10px; }
.modal-foot button { flex: 1; }

.video-box { position: relative; width: 100%; aspect-ratio: 3 / 4; background: #000; border-radius: 12px; overflow: hidden; }
.video-box video, .video-box img { width: 100%; height: 100%; object-fit: cover; display: block; }
.video-box video { transform: scaleX(-1); } /* 前置摄像头镜像预览 */
.video-box img.preview { transform: none; }

/* 提示条 */
.toast {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 24px; z-index: 200;
  background: #111827; color: #fff; padding: 11px 18px; border-radius: 10px; font-size: 14px;
  max-width: 88vw; opacity: 0; pointer-events: none; transition: opacity .22s ease, transform .22s ease;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .3);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(-6px); }
.toast.success { background: #15803d; }
.toast.error { background: #b91c1c; }

/* 表格 */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: rgba(148, 163, 184, .12); font-weight: 600; color: var(--muted); position: sticky; top: 0; }
tbody tr:hover { background: rgba(148, 163, 184, .08); }
td.wrap-cell { white-space: normal; min-width: 160px; }

.thumb { width: 52px; height: 52px; object-fit: cover; border-radius: 8px; cursor: pointer; border: 1px solid var(--border); }

.pager { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 12px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 12px; text-align: center; }
.stat .num { font-size: 22px; font-weight: 700; }
.stat .lbl { font-size: 12px; color: var(--muted); }

nav.links { display: flex; gap: 6px; }
nav.links a { color: var(--muted); text-decoration: none; font-size: 13px; padding: 6px 8px; border-radius: 8px; }
nav.links a:hover { background: rgba(148, 163, 184, .15); color: var(--text); }

.hidden { display: none !important; }

/* 大图预览 */
.lightbox { position: fixed; inset: 0; background: rgba(0, 0, 0, .88); display: none; align-items: center; justify-content: center; z-index: 300; }
.lightbox.show { display: flex; }
.lightbox img { max-width: 94vw; max-height: 88vh; border-radius: 10px; }