* {
    box-sizing: border-box;
}

body {
    background-color: black;
    color: white;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    padding: 0;
}

.header {
    margin-bottom: 20px;
}

.header h1 {
    font-size: 2.5em;
    margin: 0;
    color: #f7c600;
}

.main-container {
    text-align: center;
}

.main-container h2 {
    font-size: 2em;
    margin: 0.5em 0;
    color: white;
}

.highlighted {
    font-weight: bold;
    color: #f7c600;
}

.countdown {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.time-unit {
    margin: 0 15px;
    text-align: center;
}

.number {
    font-size: 3em;
    color: #ffffff;
}

.label {
    font-size: 1.2em;
    color: #bbb;
}

.footer {
    margin-top: 20px;
    text-align: center;
    font-size: 0.8em;
    color: #bbb;
}