body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #f5f5f5;
}

.card {
    background: #fff;
    border-radius: 16px;
    padding: 24px 28px;
    max-width: 360px;
    width: 100%;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    box-sizing: border-box;
}

.title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.subtitle {
    font-size: 13px;
    color: #666;
    margin-bottom: 18px;
}

.temp {
    font-size: 48px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

.temp .unit {
    font-size: 24px;
    vertical-align: top;
}

.status {
    font-size: 13px;
    text-align: center;
    margin-bottom: 8px;
    color: #666;
}
.status.ok {
    color: #2e7d32;
}
.status.err {
    color: #c62828;
}

.time {
    font-size: 11px;
    text-align: center;
    color: #888;
}