:root {
  font-family: Inter, sans-serif;
  font-feature-settings: 'liga' 1, 'calt' 1; /* fix for Chrome */
}
@supports (font-variation-settings: normal) {
  :root { font-family: InterVariable, sans-serif; }
}

:root {
    --bg: #0b1220;
    --text: #e5e7eb;
    --card: #111827;
    --line: #60a5fa;
    --border: #233046;
    --muted: #94a3b8;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    font-size: 1.35rem;
    margin: 0;
}

.latest-reading {
    margin: 6px 0 14px;
    font-size: 0.9rem;
    color: var(--muted);
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 16px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 160px;
}

.field label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    color: #94a3b8;
}

select {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    background: #0f172a;
    color: var(--text);
    font-size: 0.9rem;
}

.chart-card {
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--card);
    padding: 10px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.28);
}

#glucose-chart {
    width: 100%;
    height: 520px;
}

.status {
    margin-top: 10px;
    font-size: 0.88rem;
    color: var(--muted);
}


@media (max-width: 700px) {
    .container {
        padding: 12px;
    }

    #glucose-chart {
        height: 420px;
    }

    .field {
        min-width: 130px;
    }
}