:root{
    --ff-sans: "Ubuntu", sans-serif;

    --fw-400: 400;
    --fw-500: 500;
    --fw-700: 700;

    --fs-small: 0.75rem;
    --fs-regular: 1rem;
    --fs-large: 1.5rem;

    --clr-primary-500: hsl(213, 96%, 18%);
    --clr-primary-300: hsl(243, 100%, 62%);
    --clr-primary-200: hsl(228, 100%, 84%);
    --clr-primary-100: hsl(206, 94%, 87%);
    --clr-primary-400: hsl(354, 84%, 57%);

    --clr-neutral-500: hsl(231, 11%, 63%);
    --clr-neutral-400: hsl(229, 24%, 87%);
    --clr-neutral-300: hsl(217, 100%, 97%);
    --clr-neutral-200: hsl(231, 100%, 99%);
    --clr-neutral-100: hsl(0, 0%, 100%);
}

/*
  1. Use a more-intuitive box-sizing model.
*/
*, *::before, *::after {
    box-sizing: border-box;
  }
  /*
    2. Remove default margin
  */
  * {
    margin: 0;
  }
  /*
    Typographic tweaks!
    3. Add accessible line-height*/
html, 
body{
    height:100%
}
    /*4. Improve text rendering
  */
body {
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}
  /*
    5. Improve media defaults
  */
img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}
  /*
    6. Remove built-in form typography styles
  */
input, button, textarea, select {
    font: inherit;
}
  /*
    7. Avoid text overflows
  */
p, h1, h2, h3, h4, h5, h6 {
    font-size: var(--fs-regular);
    overflow-wrap: break-word;
}





body{
    font-family: var(--ff-sans);
    font-size: var(--fs-regular);
    background-color: var(--clr-primary-100);

    display: flex;
    justify-content: center;
    align-items: center;

    & h1{
        font-size: var(--fs-large);
        color: var(--clr-primary-500);
    }

    & h3{
        color: var(--clr-primary-500);
    }

    & .description{
        color: var(--clr-neutral-400);
        font-weight: var(--fw-500);
    }
}






.background-wrapper{
    width: 100%;
    max-width: 900px;
    background-color: var(--clr-neutral-100);
    border-radius: 1rem;
}
@media(max-width: 650px){
    .background-wrapper{
        max-width: 375px;
        border-radius: 0;
    }
}

.main-wrapper{
    display: flex;
    padding: 1rem;
    gap: 4.75rem;
}
@media(max-width: 650px){
    .main-wrapper{
        flex-direction: column;
        gap: 0;
        padding: 0;
    }
}

.flex-group{
    display: flex;
    align-items: center;
}

/* Desktop Sidebar */
.sidebar {
    width: 100%;
    max-width: 274px;
    height: 568px;
    padding: 2.5rem;
    color: var(--clr-neutral-400);
    text-transform: uppercase;
    font-weight: var(--fw-500);
    border-radius: 1rem;

    /* Inline SVG as background */
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='274' height='568' fill='none' viewBox='0 0 274 568'><rect width='274' height='568' fill='%23483EFF' rx='10'/><mask id='a' width='274' height='568' x='0' y='0' maskUnits='userSpaceOnUse' style='mask-type:alpha'><rect width='274' height='568' fill='%23fff' rx='10'/></mask><g mask='url(%23a)'><path fill='%236259FF' fill-rule='evenodd' d='M-34.692 543.101C3.247 632.538 168.767 685.017 211.96 612.52c43.194-72.497-66.099-85.653-104.735-160.569-38.635-74.916-68.657-121.674-124.482-104.607-55.824 17.068-55.375 106.32-17.436 195.757Z' clip-rule='evenodd'/><path fill='%23F9818E' fill-rule='evenodd' d='M233.095 601.153c60.679-28.278 92.839-143.526 41.875-171.528-50.965-28.003-57.397 47.579-108.059 75.987-50.662 28.408-82.14 50.207-69.044 88.241 13.096 38.034 74.549 35.578 135.228 7.3Z' clip-rule='evenodd'/><path stroke='%23fff' stroke-linecap='round' stroke-linejoin='bevel' stroke-width='5' d='m165.305 469.097 10.607-10.806M209.461 474.581l-12.506-10.503M187.56 488.991l-6.908 14.798'/><path fill='%23FFAF7E' d='M.305 546.891c37.003 0 67-29.997 67-67s-29.997-67-67-67-67 29.997-67 67 29.997 67 67 67Z'/></g></svg>");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}

/* Mobile Sidebar */
@media (max-width: 650px) {
    .sidebar {
        width: 100%;
        max-width: 375px;
        height: auto;
        border-radius: 0;
        display: flex;
        justify-content: center;
        gap: 1rem;

        /* Mobile inline SVG background */
        background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='375' height='172' viewBox='0 0 375 172'><defs><path id='a' d='M0 0h375v172H0z'/></defs><g fill='none' fill-rule='evenodd'><mask id='b' fill='%23fff'><use xlink:href='%23a'/></mask><use xlink:href='%23a' fill='%23483EFF'/><g mask='url(%23b)'><g transform='translate(-151.029 -133.957)'><path fill='%236259FF' d='M79.546 349.634c54.547 128.646 292.524 204.132 354.626 99.852 62.102-104.28-95.035-123.204-150.583-230.963-55.547-107.759-98.711-175.015-178.973-150.466C24.354 92.607 25 220.987 79.546 349.634Z'/><ellipse cx='129.864' cy='258.711' fill='%23FFAF7E' rx='96.329' ry='96.373'/><path fill='%23F9818E' d='M464.88 433.146c87.31-40.69 133.585-206.525 60.253-246.82-73.333-40.293-82.587 68.465-155.485 109.343-72.898 40.877-118.192 72.245-99.348 126.973 18.845 54.728 107.27 51.194 194.58 10.504Z'/><g stroke='%23FFF' stroke-linecap='round' stroke-linejoin='bevel' stroke-width='5'><path d='m367.336 243.125 15.263-15.549M430.872 251.016l-17.995-15.112M399.36 271.751l-9.94 21.293'/></g></g></g></g></svg>");
        background-size: cover;
        background-repeat: no-repeat;
        background-position: center;
    }
}


.sidebar-gap{
    gap: 1rem;
    margin-bottom: 1.25rem; 
}

.number-list{
    display: flex;
    justify-content: center;
    align-items: center;
    width: 35px;
    height: 35px;
    border: 1px solid var(--clr-neutral-400);
    border-radius: 1.5rem ;
    &.active{
        background-color: var(--clr-primary-200);
        color: var(--clr-primary-500);
        border: 0;
    }
}


.step-list span{
    font-size: var(--fs-small);
    color: var(--clr-neutral-500);
}
@media(max-width: 650px){
    .step-list{
        display: none;
    }
}




.content-wrapper{
    display: flex;
    flex-direction: column;
    justify-content: space-around;
}

section{
    display: grid;
    gap: 1rem;
}
@media(max-width: 650px){
    section{
        padding: 1rem;
        box-shadow: 0px 4px 10px rgba(0,0,0,0.2);
        background-color: var(--clr-neutral-100);
        z-index: 20;
        margin-top:-40px;
    }
}

.button-group{
    display: flex;
    justify-content: space-between;

    & .prev-nav{
        padding: 0.5rem 1rem;
        border-radius: 0.5rem;
        border: 0;
    }

    & .disabled{
        opacity: 0;
        pointer-events: none;
    }
    
    & .next-nav{
        padding: 0.5rem 1rem;
        border-radius: 0.5rem;
        border: 0;
        background-color: var(--clr-primary-500);
        color: var(--clr-neutral-100);
        &:hover{
            cursor: pointer;
        }
    }
}
@media(max-width: 650px){
    .button-group{
        padding: 1rem;
    }
}



#personal-info{
    display: grid;
    gap: 2.5rem;

    & .flex-group{
        justify-content: space-between;
    }

    & h3{
        font-size: var(--fs-small);
    }

    & .error-message{
        display: none;
        color: var(--clr-primary-400);
        font-size: var(--fs-small);
        font-weight: var(--fw-700);
    }

    & input{
        width: 100%;
        height: 90%;
        border-radius: 0.5rem;
        border: 1px solid var(--clr-neutral-400); 
        padding-left: 1rem;
        &:hover{
            border: 1px solid var(--clr-primary-300);
            cursor: pointer;
        }
        &.warning{
            border: 1px solid var(--clr-primary-400);
        }
    }
}

#select-plan{
    display: grid;
    gap: 2.5rem;
}

.plan-options-wrapper{
    display: flex;
    gap: 1rem;
    justify-content: space-between;
}
@media(max-width: 650px){
    .plan-options-wrapper{
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }
}

/*make the circle in front of the radio button disappear*/
.plan-options input[type="radio"]{
    opacity: 0;
    position: fixed;
    width: 0;
}

.plan-descriptions{
    display: flex;
    flex-direction: column;
    gap: 2rem;
    width: 140px;
    height: 170px;
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--clr-neutral-400);
    & h3{
        font-size: var(--fs-regular);
    }
    & span, p{
        font-size: var(--fs-small);
        color: var(--clr-neutral-500);
    }
    &:hover{
        cursor: pointer;
        border: 1px solid var(--clr-neutral-500);
    }
}
@media(max-width: 650px){
    .plan-descriptions{
        flex-direction: row;
        width: 340px;
        height: 100px;
        
    }
}

.plan-options input[type="radio"]:checked + .plan-descriptions {
    border: 1px solid var(--clr-primary-300); 
}

.annual-fee-promotion{
    display: none;
}

/*create a toggle switch*/
/*start by hiding the checkbox element*/
#toggle{
    display: none;
}

/*style the toggle appearance*/
.toggle-appearance{
    display: inline-block;
    /*the display property is set to inline-block to make the switch come in line with text in span tag*/
    width: 40px;
    height: 20px;
    background-color: var(--clr-primary-500);
    border-radius: 10px;
    position: relative;
    cursor: pointer;
    margin-inline: 2rem;
    
    /*create the inner part of the switch*/
    &::before{
        content: "";
        position: absolute;
        top: 2px;
        left: 2px;
        width: 16px;
        height: 16px;
        background-color: var(--clr-neutral-100);
        border-radius: 50%;
        transition: transform 0.3s;
    }
}

/*when the switch is checked, the background color of the label will change*/
#toggle:checked + .toggle-appearance{
    background-color: var(--clr-primary-300);
    
    /*add an animation to the toggle effect, making the inner part of the switch move when it is checked*/
    &::before{
        transform: translateX(20px);
    }
}

.toggle-appearance-wrapper{
    display: flex;
    justify-content: center;
    align-items: center;
    border: 0;
    border-radius: 0.5rem;
    background-color: var(--clr-neutral-200);
    padding: 0.5rem;
}



#add-ons{
    display: grid;
    gap: 1rem;
}


.checkbox-button{
    display: flex;
    align-items: center;
    border: 1px solid var(--clr-neutral-400);
    border-radius: 0.5rem;
    padding: 1rem 2rem;

    &:hover{
        cursor: pointer;
        border: 1px solid var(--clr-primary-300);
    }
}

.service-description{
    padding-left: 2rem;
}

.online-service{
    padding-left: 5rem;
}

.larger-storage{
    padding-left: 7.2rem;
}

.customizable-profile{
    padding-left: 4.2rem;
}

.price-list{
    color: var(--clr-primary-300);
}



.summary-wrapper{
    display: grid;
    gap: 1rem;

    & .flex-group{
        justify-content: space-between;
    }
}

.summary__selection-result{
    background-color: var(--clr-neutral-300);
    padding: 1.5rem;
    border-radius: 0.5rem;
    display: grid;
    gap: 2rem;
}

.summary__membership-selection{
    border-bottom: 1px solid var(--clr-neutral-400);
    padding-bottom: 2rem;
}

.summary__service-selection{
    display: grid;
    gap: 1rem;
}

.total-result{
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
}

.summary__price-details{
    margin-left: 12rem;
}

.total__price-details{
    font-size: var(--fs-regular);
    font-weight: var(--fw-500);

}

.membership-price__highlighted{
    font-size: var(--fs-regular);
    color: var(--clr-primary-500);
    font-weight: var(--fw-700);
}

.total-price__hightlighted{
    font-size: var(--fs-large);
    color: var(--clr-primary-300);
    font-weight: var(--fw-700);
}

.change-selection,
.add-ons__result p,
.summary__total-result p{
    font-size: var(--fs-regular);
    color: var(--clr-neutral-500);
}


#thank-you-page{
    text-align: center;
    padding-right: 4rem;
    gap: 1rem;

    & p{
        color: var(--clr-neutral-500);
    }
}

.img{
    display: block;
    margin: auto;
}


#select-plan,
#add-ons,
#summary,
#thank-you-page{
    display: none;
}

/*.content-details{
    display: none;
    &.show{
        display: block;
    }
}

.page-nav {
    &.disabled{
        opacity: 0.2;
        pointer-events: none;
    }
}*/