/* ============================================
   设备监测面板样式
   ============================================ */

:root {
    --c-bg:      #ffffff;
    --c-bg-alt:  #f5f6f8;
    --c-border:  #e5e6eb;
    --c-text:    #1d2129;
    --c-text-sub:#86909c;
    --c-primary: #165dff;
    --c-primary-h:#0e42d2;
    --c-danger:  #f53f3f;
    --c-success: #00b42a;
    --c-warning: #ff7d00;
    --c-shadow:  rgba(0,0,0,.06);
    --radius:    8px;
    --radius-sm: 4px;
    --font:      -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
}

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

body {
    font-family: var(--font);
    font-size: 14px;
    color: var(--c-text);
    background: var(--c-bg-alt);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* Header */
#header {
    background: var(--c-bg);
    border-bottom: 1px solid var(--c-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 56px;
    position: sticky;
    top: 0;
    z-index: 100;
}
#header .logo { font-size: 16px; font-weight: 600; }
#user-area {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--c-text-sub);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 24px;
    font-size: 14px;
    font-family: var(--font);
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: .15s;
    outline: none;
    white-space: nowrap;
    line-height: 1.4;
}
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-h); }
.btn-link { background: none; border: none; color: var(--c-primary); padding: 4px 8px; }
.btn-link:hover { color: var(--c-primary-h); }
.btn-sm { padding: 5px 12px; font-size: 13px; }

/* 主内容 */
#main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}
.center {
    text-align: center;
    padding: 100px 24px;
    color: var(--c-text);
}
.center h1 { font-size: 28px; margin-bottom: 12px; }
.center .sub { font-size: 15px; color: var(--c-text-sub); margin-bottom: 32px; }

/* 角色徽章 */
.role-badge {
    font-size: 12px; padding: 2px 8px;
    border-radius: 10px;
    background: #e8f3ff; color: var(--c-primary);
}

/* Toast */
.toast {
    position: fixed; top: 72px; left: 50%;
    transform: translateX(-50%);
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    z-index: 9999;
    opacity: 0; pointer-events: none;
    transition: opacity .25s, top .25s;
    box-shadow: 0 4px 16px var(--c-shadow);
}
.toast.show { opacity: 1; top: 80px; }
.toast.success { background: #e8ffea; color: var(--c-success); border: 1px solid #b7eb8f; }
.toast.error   { background: #fff1f0; color: var(--c-danger);  border: 1px solid #ffa39e; }
.toast.info    { background: #e8f3ff; color: var(--c-primary); border: 1px solid #b4d5ff; }

/* 工具栏 */
.toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.toolbar-title { font-size: 18px; font-weight: 600; }
.toolbar-count {
    font-size: 13px;
    color: var(--c-text-sub);
    background: var(--c-bg);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 2px 10px;
}
.toolbar-status {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--c-text-sub);
}
.ws-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--c-text-sub);
    display: inline-block;
}
.ws-dot.connected { background: var(--c-success); }
.ws-dot.disconnected { background: var(--c-danger); }

/* 设备卡片网格 */
.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}

/* 设备卡片 */
.device-card {
    background: var(--c-bg);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 20px;
    transition: box-shadow .2s;
}
.device-card:hover { box-shadow: 0 2px 12px var(--c-shadow); }
.device-card.offline { opacity: .6; }

.device-card .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.device-card .card-name {
    font-size: 16px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.device-card .card-status {
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 10px;
    font-weight: 500;
    flex-shrink: 0;
}
.card-status.online  { background: #e8ffea; color: var(--c-success); }
.card-status.offline { background: #fff1f0; color: var(--c-danger); }

/* 指标行 */
.device-card .metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 16px;
    margin-bottom: 12px;
}
.metric-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.metric-label {
    font-size: 12px;
    color: var(--c-text-sub);
}
.metric-value {
    font-size: 20px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.metric-value.warn { color: var(--c-warning); }
.metric-value.danger { color: var(--c-danger); }

/* 上报时间 */
.device-card .card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--c-border);
    padding-top: 10px;
}
.device-card .card-time {
    font-size: 12px;
    color: var(--c-text-sub);
}
.btn-delete {
    font-size: 12px;
    font-family: var(--font);
    color: var(--c-danger);
    background: none;
    border: 1px solid var(--c-danger);
    border-radius: var(--radius-sm);
    padding: 2px 10px;
    cursor: pointer;
    transition: .15s;
}
.btn-delete:hover {
    background: var(--c-danger);
    color: #fff;
}

/* 响应式 */
@media (max-width: 768px) {
    #header { padding: 0 16px; }
    #main   { padding: 16px; }
    .center { padding: 60px 16px; }
    .center h1 { font-size: 22px; }
    .device-grid { grid-template-columns: 1fr; }
    .toast { left: 12px; right: 12px; transform: none; }
}