:root {
    --bg: #eef2f5;
    --surface: #ffffff;
    --surface-strong: #f8fafc;
    --line: #d7dee7;
    --text: #17202a;
    --muted: #64748b;
    --primary: #0f766e;
    --primary-dark: #115e59;
    --accent: #f59e0b;
    --danger: #dc2626;
    --shadow: 0 12px 34px rgba(15, 23, 42, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    letter-spacing: 0;
}

button,
input {
    font: inherit;
}

.app-shell {
    display: grid;
    grid-template-columns: 360px 1fr;
    min-height: 100vh;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
    padding: 18px;
    border-right: 1px solid var(--line);
    background: var(--surface);
}

.brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.brand h1,
.panel-header h2 {
    margin: 3px 0 0;
    font-size: 20px;
    line-height: 1.2;
}

.eyebrow {
    display: block;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.icon-button {
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface-strong);
    color: var(--primary-dark);
    cursor: pointer;
}

.summary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.summary-grid div {
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface-strong);
}

.summary-grid span {
    display: block;
    color: var(--muted);
    font-size: 12px;
}

.summary-grid strong {
    display: block;
    margin-top: 4px;
    font-size: 24px;
}

.toolbar input {
    width: 100%;
    min-height: 40px;
    padding: 0 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
}

.device-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow: auto;
}

.device-card {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--line);
    border-left: 4px solid var(--primary);
    border-radius: 8px;
    background: var(--surface);
    text-align: left;
    cursor: pointer;
}

.device-card.is-stale {
    border-left-color: var(--accent);
}

.device-card.is-invalid {
    border-left-color: var(--danger);
}

.device-card strong {
    display: block;
    margin-bottom: 4px;
}

.device-card span {
    display: block;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.5;
}

.workspace {
    display: grid;
    grid-template-rows: 1fr 260px;
    min-width: 0;
    min-height: 100vh;
}

#map {
    min-height: 420px;
    width: 100%;
}

.bottom-panel {
    border-top: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--line);
}

.status-pill {
    padding: 6px 10px;
    border-radius: 999px;
    background: #e6f4f1;
    color: var(--primary-dark);
    font-size: 12px;
    font-weight: 700;
}

.table-wrap {
    height: 188px;
    overflow: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

th,
td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    white-space: nowrap;
}

th {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--surface-strong);
    color: var(--muted);
}

@media (max-width: 900px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        max-height: 48vh;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .workspace {
        grid-template-rows: 55vh 260px;
        min-height: auto;
    }
}