/* 饮水机 2B 平台 —— 后台与前台共用样式
   约定：后台左右结构 + 紧凑间距 + 自适应；前台内容居中、限宽 1200px。 */

:root {
    --c-bg: #f4f6f9;
    --c-panel: #ffffff;
    --c-border: #e3e8ef;
    --c-text: #1f2937;
    --c-text-weak: #6b7280;
    --c-primary: #2563eb;
    --c-primary-weak: #eff6ff;
    --c-success: #15803d;
    --c-success-weak: #f0fdf4;
    --c-warn: #b45309;
    --c-warn-weak: #fffbeb;
    --c-danger: #b91c1c;
    --c-danger-weak: #fef2f2;
    --c-sidebar: #111827;
    --c-sidebar-text: #cbd5e1;
    --radius: 8px;
    --gap: 12px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--c-bg);
    color: var(--c-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 13px;
    line-height: 1.6;
}

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

/* ---------- 后台左右结构 ---------- */

.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 208px;
    flex: 0 0 208px;
    background: var(--c-sidebar);
    color: var(--c-sidebar-text);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-brand {
    padding: 16px 16px 12px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    letter-spacing: .5px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.sidebar-brand small {
    display: block;
    font-weight: 400;
    font-size: 11px;
    color: #94a3b8;
    margin-top: 2px;
}

.sidebar-group { padding: 14px 0 6px; }

.sidebar-group-title {
    padding: 4px 16px 8px;
    font-size: 11px;
    color: #94a3b8;
    letter-spacing: .6px;
}

.sidebar a,
.sidebar-sub > summary {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    color: var(--c-sidebar-text);
    font-size: 13px;
    line-height: 1.5;
    border-left: 3px solid transparent;
}

.sidebar a { text-decoration: none; }
.sidebar a > span,
.sidebar-sub > summary > span { white-space: nowrap; }

/* 菜单图标：内联 SVG，描边跟随文字颜色，随 hover / active 提亮 */
.nav-ico {
    width: 16px;
    height: 16px;
    flex: 0 0 16px;
    margin-right: 10px;
    opacity: .75;
}

.sidebar a:hover { background: rgba(255,255,255,.06); color: #fff; text-decoration: none; }

.sidebar a.active {
    background: rgba(37,99,235,.18);
    border-left-color: var(--c-primary);
    color: #fff;
    font-weight: 500;
}

.sidebar a:hover .nav-ico,
.sidebar a.active .nav-ico,
.sidebar-sub > summary:hover .nav-ico,
.sidebar-sub > summary.active .nav-ico { opacity: 1; }

/* ---------- 二级子菜单 ---------- */

.sidebar-sub > summary {
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.sidebar-sub > summary::-webkit-details-marker { display: none; }

.sidebar-sub > summary::after {
    content: "▸";
    margin-left: auto;
    padding-left: 12px;
    font-size: 11px;
    color: #64748b;
    transition: transform .15s ease;
}

.sidebar-sub[open] > summary::after { transform: rotate(90deg); }

.sidebar-sub > summary:hover { background: rgba(255,255,255,.06); color: #fff; }

.sidebar-sub > summary:hover::after { color: #fff; }

.sidebar-sub > summary.active {
    background: rgba(37,99,235,.12);
    border-left-color: var(--c-primary);
    color: #fff;
    font-weight: 500;
}

.sidebar-sub > a {
    padding-left: 42px;
    font-size: 12.5px;
}

.main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; }

.topbar {
    height: 48px;
    background: var(--c-panel);
    border-bottom: 1px solid var(--c-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.topbar h1 { font-size: 14px; margin: 0; font-weight: 600; }

.topbar-user { font-size: 12px; color: var(--c-text-weak); display: flex; align-items: center; gap: 10px; }

.content { padding: var(--gap); flex: 1 1 auto; }

/* ---------- 前台居中 ---------- */

.site { max-width: 1200px; margin: 0 auto; padding: var(--gap); }

/* ---------- 卡片与栅格 ---------- */

.card {
    background: var(--c-panel);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 14px;
    margin-bottom: var(--gap);
}

.card-title {
    font-size: 13px;
    font-weight: 600;
    margin: 0 0 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.grid { display: grid; gap: var(--gap); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.stat { background: var(--c-panel); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 12px 14px; }
.stat-label { font-size: 12px; color: var(--c-text-weak); }
.stat-value { font-size: 22px; font-weight: 600; margin-top: 4px; letter-spacing: -.5px; }
.stat-hint { font-size: 11px; color: var(--c-text-weak); margin-top: 2px; }

/* ---------- 表格 ---------- */

.table-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-panel); }

table.data { width: 100%; border-collapse: collapse; font-size: 12.5px; }

table.data th, table.data td {
    padding: 8px 10px;
    text-align: left;
    border-bottom: 1px solid var(--c-border);
    white-space: nowrap;
}

table.data th { background: #f9fafb; color: var(--c-text-weak); font-weight: 500; }
table.data tr:last-child td { border-bottom: none; }
table.data tr:hover td { background: #fafbfc; }

.empty { padding: 32px; text-align: center; color: var(--c-text-weak); font-size: 13px; }

/* ---------- 表单 ---------- */

.form-row { margin-bottom: 10px; }
.form-row label { display: block; font-size: 12px; color: var(--c-text-weak); margin-bottom: 3px; }

input[type=text], input[type=password], input[type=number], input[type=date],
input[type=datetime-local], input[type=search], select {
    width: 100%;
    height: 32px;
    padding: 0 9px;
    font-size: 13px;
    line-height: normal;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    background: #fff;
    color: var(--c-text);
    font-family: inherit;
}

textarea {
    width: 100%;
    padding: 6px 9px;
    font-size: 13px;
    line-height: 1.6;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    background: #fff;
    color: var(--c-text);
    font-family: inherit;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px var(--c-primary-weak);
}

.form-inline { display: flex; gap: 8px; flex-wrap: wrap; align-items: flex-end; }
.form-inline .form-row { margin-bottom: 0; flex: 0 1 180px; }
.form-inline .form-row.grow { flex: 1 1 220px; }

.form-hint { font-size: 11px; color: var(--c-text-weak); margin-top: 3px; }

/* ---------- 按钮 ---------- */

.btn {
    display: inline-block;
    padding: 6px 12px;
    font-size: 12.5px;
    border-radius: 6px;
    border: 1px solid var(--c-border);
    background: #fff;
    color: var(--c-text);
    cursor: pointer;
    line-height: 1.4;
    font-family: inherit;
}

.btn:hover { background: #f9fafb; text-decoration: none; }

.btn-primary { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.btn-primary:hover { background: #1d4ed8; }

.btn-danger { background: #fff; border-color: #fecaca; color: var(--c-danger); }
.btn-danger:hover { background: var(--c-danger-weak); }

.btn-sm { padding: 3px 8px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- 标签 ---------- */

.tag {
    display: inline-block;
    padding: 1px 7px;
    font-size: 11px;
    border-radius: 10px;
    background: #f1f5f9;
    color: var(--c-text-weak);
    line-height: 1.7;
    white-space: nowrap;
}

.tag-primary { background: var(--c-primary-weak); color: var(--c-primary); }
.tag-success { background: var(--c-success-weak); color: var(--c-success); }
.tag-warn { background: var(--c-warn-weak); color: var(--c-warn); }
.tag-danger { background: var(--c-danger-weak); color: var(--c-danger); }

/* ---------- 提示 ---------- */

.alert { padding: 9px 12px; border-radius: 6px; font-size: 12.5px; margin-bottom: 10px; }
.alert-danger { background: var(--c-danger-weak); color: var(--c-danger); border: 1px solid #fecaca; }
.alert-warn { background: var(--c-warn-weak); color: var(--c-warn); border: 1px solid #fde68a; }
.alert-info { background: var(--c-primary-weak); color: var(--c-primary); border: 1px solid #bfdbfe; }

/* ---------- 分页 ---------- */

.pagination { display: flex; gap: 6px; align-items: center; margin-top: 10px; font-size: 12px; color: var(--c-text-weak); }
.pagination a, .pagination span.current {
    padding: 3px 9px; border: 1px solid var(--c-border); border-radius: 5px; background: #fff;
}
.pagination span.current { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

/* ---------- toast ---------- */

#toast-host { position: fixed; top: 16px; right: 16px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }

.toast {
    background: #111827;
    color: #fff;
    padding: 9px 14px;
    border-radius: 6px;
    font-size: 12.5px;
    box-shadow: 0 8px 24px rgba(0,0,0,.18);
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity .18s ease, transform .18s ease;
    max-width: 320px;
}

.toast.show { opacity: 1; transform: translateY(0); }
.toast-error { background: var(--c-danger); }
.toast-success { background: var(--c-success); }

/* ---------- 登录页 ---------- */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: #fff;
    border-radius: 12px;
    padding: 26px 24px;
    box-shadow: 0 20px 50px rgba(0,0,0,.28);
}

.login-card h1 { font-size: 17px; margin: 0 0 2px; }
.login-card .sub { font-size: 12px; color: var(--c-text-weak); margin-bottom: 18px; }

.demo-accounts { margin-top: 16px; border-top: 1px dashed var(--c-border); padding-top: 12px; }
.demo-accounts .t { font-size: 11px; color: var(--c-text-weak); margin-bottom: 6px; }
.demo-accounts button {
    display: block; width: 100%; text-align: left; margin-bottom: 4px;
    background: #f8fafc; border: 1px solid var(--c-border); border-radius: 6px;
    padding: 5px 9px; font-size: 11.5px; cursor: pointer; color: var(--c-text);
    font-family: inherit;
}
.demo-accounts button:hover { background: var(--c-primary-weak); border-color: #bfdbfe; }

/* ---------- 详情定义列表 ---------- */

dl.detail { display: grid; grid-template-columns: 128px 1fr; gap: 6px 12px; margin: 0; font-size: 12.5px; }
dl.detail dt { color: var(--c-text-weak); }
dl.detail dd { margin: 0; word-break: break-all; }

/* ---------- 现场安装 ---------- */

.install-camera {
    margin-top: 12px;
    border-radius: 10px;
    overflow: hidden;
    background: #0f172a;
    position: relative;
}

.install-camera video {
    width: 100%;
    max-height: 320px;
    display: block;
    background: #000;
}

.install-camera-tip {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 8px 12px;
    font-size: 12px;
    color: #e2e8f0;
    background: rgba(15, 23, 42, .72);
    text-align: center;
}

.install-result { margin-top: 16px; }

/* ---------- 广告图片上传 ---------- */

.ad-upload { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }

.ad-upload-preview {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
}

.ad-upload-preview img {
    max-width: 320px;
    max-height: 180px;
    object-fit: cover;
    border: 1px solid var(--c-border);
    border-radius: 8px;
    background: #f3f4f6;
}

.ad-upload-empty {
    padding: 22px 24px;
    border: 1px dashed var(--c-border);
    border-radius: 8px;
    color: var(--c-text-weak);
    font-size: 12px;
    background: #fafbfc;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
    .layout { flex-direction: column; }
    .sidebar { width: 100%; flex: none; height: auto; position: static; }
    .sidebar-group { display: flex; flex-wrap: wrap; padding: 6px 0; }
    .sidebar-group-title { width: 100%; }
    .sidebar a { border-left: none; border-bottom: 3px solid transparent; padding: 6px 12px; }
    .sidebar a.active { border-left: none; border-bottom-color: var(--c-primary); }
    .sidebar-sub { width: 100%; }
    .sidebar-sub > summary { border-left: none; border-bottom: 3px solid transparent; padding: 6px 12px; }
    .sidebar-sub > summary.active { border-left: none; border-bottom-color: var(--c-primary); }
    .sidebar-sub > a { padding: 6px 12px 6px 24px; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); }
    dl.detail { grid-template-columns: 96px 1fr; }
}