body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}
header {
    background-color: #333;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}
nav ul {
    list-style: none;
    padding: 0;
}
nav ul li {
    display: inline;
    margin: 0 15px;
}
nav ul li a {
    color: #fff;
    text-decoration: none;
}
main {
    padding: 20px;
}
footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}

.countdown-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background-color: #f8f8f8;
}

.countdown-container h1 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 2rem;
}

.timer {
    display: flex;
    gap: 2rem;
}

.time-block {
    text-align: center;
    background-color: #fff;
    padding: 1.5rem 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.time-block span:first-child {
    font-size: 2.5rem;
    font-weight: bold;
    color: #d32f2f;
    display: block;
    margin-bottom: 0.5rem;
}

.time-block span:last-child {
    font-size: 1rem;
    color: #666;
}