:root {
    color-scheme: light dark;
    --bg: #f5f5f5;
    --fg: #1a1a1a;
    --border: #ccc;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #181818;
        --fg: #eee;
        --border: #444;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, sans-serif;
    background: var(--bg);
    color: var(--fg);
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

h1 {
    font-size: 1.25rem;
    margin: 0;
}

#controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

main {
    display: flex;
    justify-content: center;
    padding: 3rem 1rem;
}

/* The monitor mimics the PM5's own dark bezel + green LCD -- fixed regardless
   of page theme, since it's a physical-device replica, not themed page UI. */
.monitor {
    width: 100%;
    max-width: 480px;
    background: #2b2b2b;
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.screen {
    padding: 1.25rem;
    border-radius: 6px;
    background: #9ead86;
    color: #1c2a14;
    font-family: 'Courier New', monospace;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.monitor.live .screen {
    opacity: 1;
}

.screen-header {
    display: flex;
    justify-content: space-between;
    min-height: 1.2em;
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.screen-primary {
    margin-bottom: 1rem;
    text-align: center;
}

.primary-label {
    display: block;
    font-size: 0.85rem;
}

.primary-value {
    display: block;
    font-size: 3.5rem;
    font-weight: bold;
    line-height: 1;
}

.screen-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.cell {
    text-align: center;
}

.cell-label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
}

.cell-value {
    display: block;
    font-size: 1.4rem;
    font-weight: bold;
}