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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    padding: 20px;
}

/* Tab styling */
.tab {
    display: flex;
    background-color: transparent;
    margin-bottom: 20px;
    gap: 8px;
}

.tab button {
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 12px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: #666;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.tab button:hover {
    background-color: #f8f8f8;
    border-color: #d0d0d0;
}

.tab button.active {
    background-color: #ffffff;
    color: #333;
    border-color: #c0c0c0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* Container styling - matches your current design */
.container {
    max-width: 700px;
    margin: 40px auto;
    display: none;
    flex-direction: column;
    gap: 30px;
}

.container.active {
    display: flex;
}

/* Card styling to match your current design */
.card {
    background-color: white;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid #e0e0e0;
}

.card-header {
    padding: 15px 20px;
    background-color: #f9f9f9;
    border-bottom: 1px solid #e0e0e0;
    text-align: center;
}

.card-header h2 {
    font-size: 18px;
    font-weight: 500;
    color: #333;
    margin: 0;
}

.card-body {
    padding: 30px 20px;
    text-align: center;
}

.release-number {
    font-size: 36px;
    font-weight: 600;
    background-color: #4CAF50;
    color: white;
    width: 120px;
    height: 70px;
    line-height: 70px;
    border-radius: 4px;
    margin: 0 auto 15px;
}

.release-date, .next-release-date {
    font-size: 24px;
    font-weight: 400;
    color: #333;
}

.next-release-date {
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 10px;
}

.disclaimer {
    color: #777;
    font-size: 16px;
}

.badge {
    background-color: #4285F4;
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 400;
    margin-left: 5px;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .container {
        margin: 20px auto;
    }
    
    .release-number {
        font-size: 32px;
        width: 100px;
        height: 60px;
        line-height: 60px;
    }
    
    .release-date, .next-release-date {
        font-size: 20px;
    }
    
    .next-release-date {
        font-size: 28px;
    }
}