* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #f5f5f7 0%, #e5e5ea 100%);
    color: #1d1d1f;
    line-height: 1.47059;
    font-weight: 400;
    letter-spacing: -.022em;
    min-height: 100vh;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    
        max-width: 980px;
        margin: 0 auto;
        padding: 40px 20px;
        text-align: center;
        background-color: rgba(255, 255, 255, 0.8); /* Semi-transparent white background */
        border-radius: 20px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 56px;
    font-weight: 600;
    margin-bottom: 40px;
}

#countdown {
    font-size: 48px;
    font-weight: 600;
    margin-bottom: 40px;
}

button {
    background-color: #0071e3;
    color: #fff;
    border: none;
    border-radius: 980px;
    font-size: 17px;
    line-height: 1.17648;
    font-weight: 400;
    letter-spacing: -.022em;
    padding: 8px 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0077ed;
}

.popup {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

.popup-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border-radius: 14px;
    width: 80%;
    max-width: 400px;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

input {
    padding: 10px;
    border: 1px solid #d2d2d7;
    border-radius: 4px;
    font-size: 17px;
}

@media (max-width: 734px) {
    h1 {
        font-size: 40px;
    }

    #countdown {
        font-size: 36px;
    }
}