:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #0f172a;
  --border: #334155;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }

/* ---------- 通用组件 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border: none; border-radius: 8px;
  background: var(--primary); color: #fff; font-size: 14px; cursor: pointer;
  transition: background .15s;
}
.btn:hover { background: var(--primary-hover); }
.btn.secondary { background: var(--border); color: var(--text); }
.btn.secondary:hover { background: #475569; }
.btn.danger { background: var(--danger); }
.btn.danger:hover { background: #dc2626; }
.btn.sm { padding: 5px 10px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px;
}

input, select, textarea {
  width: 100%; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-input);
  color: var(--text); font-size: 14px; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }

.form-row { margin-bottom: 14px; }
.form-row label { display: block; margin-bottom: 6px; color: var(--text-dim); font-size: 13px; }

.muted { color: var(--text-dim); font-size: 13px; }
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: 12px; background: var(--border); color: var(--text);
}
.badge.on { background: rgba(34,197,94,.18); color: var(--success); }
.badge.off { background: rgba(148,163,184,.15); color: var(--text-dim); }
.badge.warn { background: rgba(245,158,11,.18); color: var(--warning); }

.mono { font-family: Consolas, monospace; }

/* ---------- 登录页 ---------- */
.login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px;
}
.login-card { width: 100%; max-width: 360px; }
.login-card h1 { font-size: 20px; margin-bottom: 20px; text-align: center; }
.login-error { color: var(--danger); font-size: 13px; margin-bottom: 12px; min-height: 18px; }

/* ---------- 主布局 ---------- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px; background: var(--bg-card); border-right: 1px solid var(--border);
  padding: 16px; flex-shrink: 0;
}
.sidebar .brand { font-size: 17px; font-weight: 600; margin-bottom: 24px; }
.sidebar nav a {
  display: block; padding: 10px 12px; border-radius: 8px; margin-bottom: 4px;
  color: var(--text-dim); font-size: 14px;
}
.sidebar nav a.active { background: var(--primary); color: #fff; }
.sidebar nav a:hover { background: rgba(59,130,246,.12); color: var(--text); }
.sidebar .user-info { position: absolute; bottom: 16px; left: 16px; right: 16px; }

.main { flex: 1; padding: 24px; max-width: 960px; }
.page-title { font-size: 20px; margin-bottom: 16px; }

/* ---------- 设备列表 ---------- */
.device-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.device-card { cursor: pointer; }
.device-card:hover { border-color: var(--primary); }
.device-card h3 { font-size: 16px; margin-bottom: 8px; }
.device-card .meta { font-size: 13px; color: var(--text-dim); line-height: 1.7; }

/* ---------- 设备详情 ---------- */
.back-link { display: inline-block; margin-bottom: 16px; font-size: 14px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; flex-wrap: wrap; }
.tabs button {
  background: none; border: none; color: var(--text-dim); padding: 10px 14px;
  font-size: 14px; cursor: pointer; border-bottom: 2px solid transparent;
}
.tabs button.active { color: var(--text); border-bottom-color: var(--primary); font-weight: 600; }

.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------- 截图 ---------- */
.shot-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.shot-grid .shot { border-radius: 8px; overflow: hidden; border: 1px solid var(--border); background: #000; }
.shot-grid img { width: 100%; display: block; min-height: 110px; object-fit: cover; }
.shot-grid .shot-caption { padding: 6px 8px; font-size: 12px; color: var(--text-dim); background: var(--bg-card); }
.shot-grid .shot { position: relative; }
.shot-grid .shot-del { position: absolute; top: 6px; right: 6px; width: 24px; height: 24px; border: none; border-radius: 50%;
  background: rgba(0,0,0,.6); color: #fff; font-size: 16px; line-height: 22px; cursor: pointer; z-index: 2; }
.shot-grid .shot-del:hover { background: rgba(220,40,40,.85); }
.shot-viewer { position: fixed; inset: 0; background: rgba(0,0,0,.9); display: flex; align-items: center; justify-content: center; z-index: 50; }
.shot-viewer img { max-width: 92vw; max-height: 92vh; border-radius: 6px; }
.shot-viewer .close { position: absolute; top: 16px; right: 20px; font-size: 28px; cursor: pointer; color: #fff; }

/* ---------- 日志 ---------- */
.log-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.log-table th, .log-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.log-table th { color: var(--text-dim); font-weight: 500; }

/* ---------- 表格通用 ---------- */
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
.table th { color: var(--text-dim); font-weight: 500; }

.empty { text-align: center; color: var(--text-dim); padding: 40px 0; font-size: 14px; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 40;
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.modal { width: 100%; max-width: 460px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.modal h3 { margin-bottom: 16px; font-size: 16px; }
.modal .actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

/* ---------- toast ---------- */
#toast { position: fixed; top: 18px; right: 18px; z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.toast-item {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 14px; font-size: 14px; box-shadow: 0 4px 12px rgba(0,0,0,.4);
}
.toast-item.success { border-color: var(--success); color: var(--success); }
.toast-item.error { border-color: var(--danger); color: var(--danger); }

/* ---------- 规则编辑器 ---------- */
.rule-app-item {
  display: flex; gap: 8px; margin-bottom: 8px; align-items: center;
}
.rule-app-item input { flex: 1; }
.period-row { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 8px; margin-bottom: 8px; }
.checkbox-line { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.checkbox-line input { width: auto; }
.checkbox-line label { color: var(--text); }

.kv { display: grid; grid-template-columns: 120px 1fr; gap: 6px 12px; font-size: 14px; }
.kv .k { color: var(--text-dim); }