/* ============================================================
   消防水箱智能监测 · 云平台（对齐交接文档 v3.3 §7）
   与设备内置网页同一套视觉语言：蓝白科技风、卡片式、移动端优先
   ============================================================ */
:root {
  /* 品牌色（顶栏渐变） */
  --blue-900: #1e3a8a;
  --blue-700: #1d4ed8;
  --blue-600: #2563eb;
  /* 功能色 */
  --green: #16a34a;
  --red:   #dc2626;
  --amber: #d97706;
  --gray:  #6b7280;
  /* 中性色 */
  --bg:      #eef2f7;
  --card:    #ffffff;
  --surface: #f8fafc;
  --line:    #e5e7eb;
  --border:  #cbd5e1;
  --text:    #1f2937;
  --text-2:  #4b5563;
  --text-3:  #6b7280;
  --text-4:  #9ca3af;
  /* 圆角与阴影 */
  --r-card: 14px; --r-box: 12px; --r-btn: 10px; --r-input: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08);
  --font: -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 14px;
}

/* ---------- 顶栏（吸顶 + 品牌渐变） ---------- */
header {
  position: sticky; top: 0; z-index: 10;
  background: linear-gradient(135deg, var(--blue-900), var(--blue-600));
  color: #fff;
}
header .head-inner {
  display: flex; align-items: center; flex-wrap: wrap;
  padding: 6px 12px 10px;
}
header h1 {
  flex: 1 1 auto; order: 1;
  font-size: 16px; text-align: center; font-weight: 600; letter-spacing: 1px;
}
header .head-actions { order: 2; flex: 0 0 auto; display: flex; gap: 6px; }
header .head-actions:empty { display: none; }
header .head-actions a {
  flex: 0 0 auto; border: 0; background: rgba(255,255,255,.14);
  color: #dbe7ff; font-size: 13px; padding: 6px 14px; border-radius: 999px;
  text-decoration: none; white-space: nowrap;
  transition: background .2s, color .2s, box-shadow .2s;
}
header .head-actions a:hover {
  background: rgba(255,255,255,.25); color: #fff;
}
header .head-user {
  order: 4; flex: 0 0 auto; display: flex; align-items: center;
  gap: 6px; margin-left: 6px;
}
header .head-user:empty { display: none; }
header .head-user .uname {
  color: #dbe7ff; font-size: 13px; white-space: nowrap;
  max-width: 110px; overflow: hidden; text-overflow: ellipsis;
}
header .head-user a, header .head-user .linkbtn {
  flex: 0 0 auto; border: 0; background: rgba(255,255,255,.14);
  color: #dbe7ff; font-size: 13px; padding: 6px 14px; border-radius: 999px;
  text-decoration: none; white-space: nowrap; cursor: pointer;
  font-family: var(--font);
  transition: background .2s, color .2s;
}
header .head-user a:hover, header .head-user .linkbtn:hover {
  background: rgba(255,255,255,.25); color: #fff;
}
header .head-user form { display: inline; margin: 0; }
header .head-nav { order: 3; flex: 0 0 100%; }
header .head-nav:empty { display: none; }
header nav { display: flex; gap: 4px; overflow-x: auto; padding-top: 8px; }
header nav a, header nav button {
  flex: 1 0 auto; border: 0; background: rgba(255,255,255,.14);
  color: #dbe7ff; font-size: 14px; padding: 8px 16px; border-radius: 999px;
  text-decoration: none; text-align: center; white-space: nowrap; cursor: pointer;
  font-family: var(--font);
  transition: background .2s, color .2s, box-shadow .2s;
}
header nav a.active, header nav button.active {
  background: #fff; color: var(--blue-700); font-weight: 600;
  box-shadow: 0 2px 8px rgba(30,58,138,.28);
}
header nav a:hover:not(.active), header nav button:hover:not(.active) {
  background: rgba(255,255,255,.25); color: #fff;
}

/* PC（≥800px）：标题居左，全部分栏与操作按钮靠右紧邻排列，不再全宽拉伸 */
@media (min-width: 800px) {
  header .head-inner {
    flex-wrap: nowrap; margin: 0; padding: 10px 20px;
  }
  header h1 {
    flex: 0 0 auto; order: 1; text-align: left; font-size: 17px;
  }
  header .head-nav {
    order: 3; flex: 0 1 auto; min-width: 0; margin-left: auto;
  }
  header .head-actions { order: 4; flex: 0 0 auto; margin-left: 6px; }
  /* 无分栏的页面（新增/编辑设备）：返回按钮独自靠右 */
  header .head-inner:not(:has(.head-nav:not(:empty))) .head-actions {
    margin-left: auto;
  }
  header nav { padding-top: 0; gap: 6px; }
  header nav a, header nav button {
    flex: 0 0 auto; font-size: 13px; padding: 6px 14px;
  }
}

main { flex: 1; width: 100%; max-width: 560px; margin: 0 auto; padding: 12px; }
main.wide { max-width: 880px; }

/* ---------- 页脚 ---------- */
footer {
  background: #fff; color: var(--text-4); text-align: center;
  font-size: 11px; padding: 10px 8px; border-top: 1px solid var(--line); line-height: 1.8;
}
footer a, .hint a { color: inherit; text-decoration: none; }
footer a:hover, .hint a:hover { text-decoration: underline; }

/* ---------- flash 消息 ---------- */
.flashes { margin-bottom: 12px; }
.flash {
  padding: 10px 14px; border-radius: var(--r-box); margin-bottom: 8px;
  border: 1px solid var(--line); background: var(--card); font-size: 13px;
  word-break: break-all;
}
.flash-success { border-color: var(--green); color: var(--green); }
.flash-danger  { border-color: var(--red); color: var(--red); }
.flash-warning { border-color: var(--amber); color: var(--amber); }

/* ---------- 卡片 ---------- */
.card {
  background: var(--card); border-radius: var(--r-card);
  padding: 14px; margin-bottom: 12px; box-shadow: var(--shadow);
}
.card h2 {
  font-size: 13px; color: var(--text-3); margin-bottom: 10px; font-weight: 600;
  border-left: 3px solid var(--blue-600); padding-left: 8px;
}
.card h2 .right { float: right; color: var(--text-4); font-weight: 400; }

/* ---------- 状态数据卡（监控大屏核心组件） ---------- */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-box); padding: 12px 8px; text-align: center;
}
.stat .label { font-size: 12px; color: var(--text-3); margin-bottom: 6px; }
.stat .value { font-size: 19px; font-weight: 700; word-break: break-all; }
.v-ok { color: var(--green); } .v-bad { color: var(--red); } .v-warn { color: var(--amber); }
.v-muted { color: var(--text-4); }
@media (min-width: 600px) { .grid { grid-template-columns: repeat(3, 1fr); } }

/* ---------- 信息行 ---------- */
.row-info {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 2px; border-bottom: 1px dashed var(--line); font-size: 14px;
}
.row-info:last-child { border-bottom: 0; }
.row-info .k { color: var(--text-3); }
.row-info .v { text-align: right; word-break: break-all; }

/* ---------- 控制按钮（绿=开启类 / 红=关闭类 / 灰=中性） ---------- */
.btnrow { display: flex; flex-wrap: wrap; gap: 8px; }
.btn {
  flex: 1 1 auto; min-width: 88px; border: 0; border-radius: var(--r-btn);
  padding: 12px 6px; font-size: 15px; color: #fff; cursor: pointer;
  background: var(--gray); text-align: center; position: relative; overflow: hidden;
  transition: transform .08s;
}
.btn.on { background: var(--green); }
.btn.off { background: var(--red); }
.btn.auto { background: var(--gray); }
.btn.active { box-shadow: inset 0 0 0 3px #fff, 0 0 0 3px var(--blue-600); }
.btn:active { transform: scale(.95); }
.btn.busy { opacity: .65; pointer-events: none; }
.btn.busy::after {
  content: ''; position: absolute; top: 0; bottom: 0; left: -45%; width: 45%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.55), transparent);
  animation: shine .9s linear infinite;
}
@keyframes shine { to { left: 115%; } }

/* ---------- 开关（绿色滑块） ---------- */
.switch {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-box); padding: 10px 12px; margin-bottom: 8px;
}
.switch .txt { font-size: 14px; }
.switch .sub { font-size: 11px; color: var(--text-4); margin-top: 3px; line-height: 1.4; }
.tgl { position: relative; width: 46px; height: 26px; flex: none; margin-left: 10px; }
.tgl input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; inset: 0; background: var(--border); border-radius: 26px; transition: .2s; cursor: pointer; }
.slider:before {
  content: ''; position: absolute; width: 20px; height: 20px; left: 3px; top: 3px;
  background: #fff; border-radius: 50%; transition: .2s;
}
.tgl input:checked + .slider { background: var(--green); }
.tgl input:checked + .slider:before { transform: translateX(20px); }

/* ---------- 音效下拉 / 折叠块 / 提示 ---------- */
.sndrow {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-box); padding: 10px 12px; margin-bottom: 8px;
}
.sndrow .txt { font-size: 14px; }
select {
  width: 150px; padding: 8px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; background: #fff; color: var(--text);
}
details.fold {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 12px; margin-bottom: 10px;
}
details.fold summary {
  font-size: 14px; color: var(--text-2); cursor: pointer; user-select: none;
  list-style: none; position: relative; padding-left: 16px;
}
details.fold summary::-webkit-details-marker { display: none; }
details.fold summary::before {
  content: '›'; position: absolute; left: 2px; top: 0;
  font-size: 16px; color: var(--blue-600); transition: transform .2s;
}
details.fold[open] summary::before { transform: rotate(90deg); }
.hint { font-size: 12px; color: var(--text-4); margin-top: 10px; line-height: 1.6; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 72px; transform: translateX(-50%);
  background: rgba(17,24,39,.92); color: #fff; padding: 9px 20px;
  border-radius: 22px; font-size: 14px; opacity: 0; transition: .25s;
  pointer-events: none; z-index: 99; max-width: 86vw; text-align: center;
}
.toast.show { opacity: 1; }

/* ---------- 表单 ---------- */
form label { display: block; color: var(--text-2); margin-bottom: 4px; font-size: 12px; }
input[type=text], input[type=password], input[type=number], textarea {
  width: 100%; padding: 10px; font-size: 15px; margin-bottom: 14px;
  border: 1px solid var(--border); border-radius: 9px; background: #fff; color: var(--text);
}
textarea { resize: vertical; min-height: 60px; }
.form-grid { display: grid; grid-template-columns: 1fr; gap: 0 16px; }
@media (min-width: 600px) { .form-grid { grid-template-columns: 1fr 1fr; } }

.btn-sm { flex: 0 0 auto; min-width: 0; padding: 8px 14px; font-size: 13px; border-radius: var(--r-btn); }
.btn-primary { background: var(--blue-600); }
.btn-danger { background: var(--red); }
.btn-warn { background: var(--amber); }
.btn-ok { background: var(--green); }
.btn-submit {
  width: 100%; padding: 12px; font-size: 15px; border: 0; border-radius: var(--r-btn);
  background: var(--blue-600); color: #fff; cursor: pointer; margin-top: 6px;
}
.btn-submit:active { transform: scale(.98); }
.btn-submit.busy { opacity: .65; pointer-events: none; }

/* ---------- 仪表盘（设备列表） ---------- */
.stat-row { display: flex; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.stat-mini {
  background: var(--card); border-radius: var(--r-box); box-shadow: var(--shadow);
  padding: 10px 14px; flex: 1; min-width: 72px; text-align: center;
}
.stat-mini .num { font-size: 22px; font-weight: 700; }
.stat-mini .label { font-size: 12px; color: var(--text-3); margin-top: 2px; }
.stat-mini.ok .num { color: var(--green); }
.stat-mini.off .num { color: var(--text-4); }
.stat-mini.danger .num { color: var(--red); }
.stat-mini.info .num { color: var(--blue-600); }

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 14px;
}
.device-card {
  background: var(--card); border-radius: var(--r-card); box-shadow: var(--shadow);
  padding: 16px; text-decoration: none; color: var(--text); display: flex;
  flex-direction: column; min-width: 0;
}
.device-card .card-head {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 8px; margin-bottom: 4px;
}
.device-card .card-title { font-weight: 700; font-size: 16px; word-break: break-all; }
.device-card .card-sub { color: var(--text-3); font-size: 12px; margin-bottom: 2px; word-break: break-all; }

/* 卡片内 2x2 指标 */
.device-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 12px 0 10px; }
.dstat { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; }
.dstat .k { display: block; font-size: 11px; color: var(--text-3); margin-bottom: 3px; }
.dstat .v { font-size: 16px; font-weight: 700; word-break: break-all; }
.dstat .s { font-size: 11px; color: var(--text-4); margin-left: 4px; font-weight: 400; }
.device-card .level-bar { margin: 2px 0 8px; }
.device-card .row-info { font-size: 13px; padding: 7px 2px; }

/* ---------- 徽章 / 状态点 ---------- */
.badge {
  display: inline-block; padding: 1px 9px; border-radius: 999px;
  font-size: 11px; border: 1px solid var(--line); white-space: nowrap;
}
.badge-ok { color: var(--green); border-color: var(--green); background: rgba(22,163,74,.08); }
.badge-warn { color: var(--amber); border-color: var(--amber); background: rgba(217,119,6,.08); }
.badge-danger { color: var(--red); border-color: var(--red); background: rgba(220,38,38,.08); }
.badge-muted { color: var(--text-4); border-color: var(--line); }
.badge-alarm { color: #fff; background: var(--red); border-color: var(--red); animation: blink 1s step-start infinite; }
@keyframes blink { 50% { opacity: .55; } }

.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 5px; }
.dot.on { background: var(--green); }
.dot.off { background: var(--text-4); }
.online-tag { font-size: 12px; color: var(--text-3); white-space: nowrap; }

/* ---------- 水位进度条 ---------- */
.level-bar {
  height: 8px; background: var(--surface); border: 1px solid var(--line);
  border-radius: 4px; margin-top: 10px; overflow: hidden;
}
.level-bar .fill {
  height: 100%; background: linear-gradient(90deg, var(--blue-600), var(--green));
  border-radius: 4px;
}
.level-bar.low .fill { background: linear-gradient(90deg, var(--amber), var(--red)); }

/* ---------- 表格 ---------- */
table { width: 100%; border-collapse: collapse; font-size: 12px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); }
th { color: var(--text-3); font-weight: 600; }
td code { font-size: 11px; word-break: break-all; }
.empty { color: var(--text-4); text-align: center; padding: 22px 0; }

/* ---------- 图表 ---------- */
.chart-box { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-box); padding: 6px; }
.chart-legend { font-size: 12px; color: var(--text-3); margin-top: 8px; display: flex; gap: 16px; flex-wrap: wrap; }
.chart-legend .sw { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; }

/* ---------- 设备管理（关于） ---------- */
.kv-grid { display: grid; grid-template-columns: 1fr; gap: 0; }
.kv { display: flex; justify-content: space-between; align-items: center; padding: 8px 2px; border-bottom: 1px dashed var(--line); font-size: 13px; }
.kv:last-child { border-bottom: 0; }
.kv .k { color: var(--text-3); }
.kv .v { font-weight: 600; word-break: break-all; text-align: right; }
.kv .v code { font-size: 12px; }
.mt { margin-top: 12px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.actions form { display: inline; }

/* ---------- 筛选与分页（日志/历史数据页） ---------- */
.filters {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-box);
  padding: 12px;
}
.filter-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; }
.filter-item { display: flex; flex-direction: column; gap: 5px; flex: 1 1 170px; }
.filter-item label { font-size: 12px; color: var(--text-3); margin: 0; }
.filter-item select,
.filter-item input[type=datetime-local] {
  width: 100%; height: 38px; padding: 7px 10px; margin: 0;
  border: 1px solid var(--border); border-radius: var(--r-input);
  background: #fff; color: var(--text); font-size: 14px;
  font-family: var(--font);
  transition: border-color .2s, box-shadow .2s;
}
.filter-item select:focus,
.filter-item input[type=datetime-local]:focus {
  outline: none; border-color: var(--blue-600);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.filter-item select {
  -webkit-appearance: none; appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-3) 50%),
    linear-gradient(135deg, var(--text-3) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  padding-right: 32px;
}
.filter-item input[type=datetime-local]::-webkit-calendar-picker-indicator {
  cursor: pointer; opacity: .55; margin-left: 2px;
}
/* 空时间框：隐藏“年/月/日 --:--”示例文字（聚焦或已有值时正常显示） */
.filter-item input[type=datetime-local].dt-empty:not(:focus)::-webkit-datetime-edit {
  color: transparent;
}
.filter-actions { display: flex; gap: 8px; align-items: flex-end; }
.btn-query {
  height: 38px; padding: 0 22px; border: 0; border-radius: var(--r-btn);
  background: var(--blue-600); color: #fff; font-size: 14px;
  cursor: pointer; text-decoration: none; line-height: 38px;
  font-family: var(--font);
  transition: background .2s, transform .08s;
  white-space: nowrap;
}
.btn-query:hover { background: var(--blue-700); }
.btn-query:active { transform: scale(.96); }
.btn-query.gray { background: var(--gray); }
.btn-query.gray:hover { background: #4b5563; }
.pager {
  display: flex; align-items: center; justify-content: center;
  gap: 10px; margin-top: 14px; font-size: 13px; color: var(--text-3);
}
.pager a {
  padding: 7px 16px; border-radius: var(--r-btn);
  background: var(--card); border: 1px solid var(--line);
  text-decoration: none; color: var(--blue-700);
}
.pager a:hover { border-color: var(--blue-600); }
.pager a.disabled { opacity: .4; pointer-events: none; color: var(--text-4); }
.pager .info { margin: 0 4px; }

@media (min-width: 600px) {
  main.wide { max-width: 880px; }
}

/* ---------- 登录 / 注册 / 账号 ---------- */
.auth-main { max-width: 400px; margin: 6vh auto 0; }
.auth-card {
  background: var(--card); border-radius: var(--r-card);
  padding: 24px; box-shadow: var(--shadow);
}
.auth-card h2 {
  font-size: 15px; color: var(--text-3); margin-bottom: 14px;
  font-weight: 600; border-left: 3px solid var(--blue-600); padding-left: 8px;
}
.auth-card .hint { margin-top: 12px; text-align: center; }
.auth-card .hint a { color: var(--blue-600); }

/* 详情页分栏（在 header 内已由 nav pill 样式覆盖） */