body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f5f5f5;
    color: #333;
}

    body.dark {
        background-color: #121212;
        color: #fff;
    }

h1 {
    text-align: center;
    margin-bottom: 20px;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.clock-card {
    padding: 15px;
    border-radius: 10px;
    background-color: #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.2s, border 0.2s;
}

body.dark .clock-card {
    background-color: #1e1e1e;
    color: #fff;
}

.clock-card:hover {
    transform: translateY(-5px);
}

.clock-card h3 {
    margin-bottom: 10px;
}

.clock-card p {
    font-size: 1.2rem;
}

/* Highlight local timezone */
.clock-card.local-tz {
    border: 3px solid #007bff;
    box-shadow: 0 0 15px rgba(0,123,255,0.5);
}

.clock-card h3 {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.clock-card .country {
    font-size: 0.9rem;
    color: gray;
}

.clock-card.local-tz h3 {
    font-weight: bold;
}