:root {
    --bg-dark: #121212;
    --card-bg: #1e1e1e;
    --text-main: #ffffff;
    --accent-blue: #3498db;
}

body {
    margin: 0;
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Segoe UI', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.card {
    background: var(--card-bg);
    padding: clamp(20px, 2vw, 40px);
    border-radius: clamp(10px, 1vw, 20px);
    border-top: 4px solid var(--accent-blue);
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

.card-title {
    font-size: clamp(14px, 1.5vw, 24px);
    text-transform: uppercase;
    color: #aaa;
    margin-bottom: 10px;
}

.card-value {
    font-size: clamp(40px, 4vw, 80px);
    font-weight: bold;
}

.card-sub {
    font-size: clamp(12px, 1vw, 18px);
    color: #777;
    margin-top: 10px;
}