body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #101010;
    color: #eee;
}

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 18px 18px 96px;
}

header {
    text-align: center;
    margin-bottom: 16px;
}

h1 {
    margin: 0 0 8px;
    font-size: 1.8rem;
}

h2 {
    margin-top: 0;
}

#statusLine {
    color: #aaa;
    font-size: 0.95rem;
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}

.big-card {
    background: #222;
    border: 1px solid #333;
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    margin-bottom: 16px;
}

.big-card p {
    font-size: 4rem;
    margin: 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px;
}

.card {
    background: #222;
    border: 1px solid #333;
    border-radius: 14px;
    padding: 16px;
    text-align: center;
}

.card h2 {
    font-size: 1rem;
    color: #aaa;
}

.card p {
    font-size: 2.1rem;
    margin: 0;
}

.relay-row {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.relay-pill {
    flex: 1;
    background: #252525;
    border: 1px solid #444;
    border-radius: 999px;
    padding: 14px;
    text-align: center;
    font-size: 1.2rem;
}

.detail-list {
    background: #222;
    border: 1px solid #333;
    border-radius: 14px;
    overflow: hidden;
    margin-bottom: 18px;
}

.detail-list div {
    display: flex;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid #333;
    font-size: 1.2rem;
}

.detail-list div:last-child {
    border-bottom: none;
}

button {
    font-size: 1.1rem;
    padding: 16px 20px;
    border: none;
    border-radius: 12px;
    background: #444;
    color: white;
    cursor: pointer;
    min-width: 130px;
}

button:hover {
    background: #666;
}

#power button,
#system button {
    display: block;
    width: 100%;
    margin-bottom: 14px;
    font-size: 1.4rem;
    padding: 22px;
}

nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    background: #181818;
    border-top: 1px solid #333;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
    padding: 8px;
}

nav button {
    min-width: 0;
    padding: 14px 4px;
    font-size: 0.9rem;
    border-radius: 10px;
}


.alarm-overlay {
    position: fixed;
    inset: 0;
    background: #200;
    color: white;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.alarm-overlay.hidden {
    display: none;
}

.alarm-box {
    width: min(720px, 100%);
    background: #3a0000;
    border: 4px solid #ffdddd;
    border-radius: 24px;
    padding: 36px;
    text-align: center;
    box-shadow: 0 0 40px rgba(0,0,0,0.7);
}

.alarm-icon {
    font-size: 5rem;
    margin-bottom: 12px;
}

.alarm-box h1 {
    font-size: 2.4rem;
    margin-bottom: 18px;
}

.alarm-box p {
    font-size: 1.8rem;
    margin-bottom: 28px;
}

.alarm-box button {
    width: 100%;
    font-size: 1.5rem;
    padding: 24px;
    background: white;
    color: #300;
    font-weight: bold;
}


.settings-list {
    background: #222;
    border: 1px solid #333;
    border-radius: 14px;
    padding: 16px;
}

.settings-list label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 12px 0;
    font-size: 1.1rem;
    border-bottom: 1px solid #333;
}

.settings-list label:last-of-type {
    border-bottom: none;
}

.settings-list input {
    width: 90px;
    font-size: 1.2rem;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #555;
    background: #111;
    color: white;
    text-align: center;
}