:root{
/*----COLOURS----*/
--chinese-violet_30: hsla(202, 14%, 46%, 0.3);
--chinese-violet: hsla(214, 84%, 42%, 0.518);
--sonic-silver: hsl(209, 20%, 48%);
--old-rose_30: hsla(205, 37%, 62%, 0.3);
--ghost-white: hsl(180, 31%, 95%);
--light-pink: hsl(205, 29%, 43%);
--light-gray: hsl(0, 0%, 80%);
--old-rose: hsl(220, 36%, 56%);
--seashell: hsl(218, 44%, 93%);
--charcoal: hsl(203, 30%, 26%);
--white: hsl(0, 0%, 100%);

/*----TOPOGRAPHY----*/
--ff-philosopher: 'Philosopher', sans-serif;
--ff-poppins: 'Poppins', sans-serif;

--fs-1: 4rem;
--fs-2: 3.2rem;
--fs-3: 2.7rem;
--fs-4: 2.4rem;
--fs-5: 2.2rem;
--fs-6: 2rem;
--fs-7: 1.8rem;

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

/*----SPACING----*/
--section-padding: 80px;

/*----SHADOW----*/
--shadow-1: 4px 6px 10px hsla(231, 94%, 7%, 0.06);
--shadow-2: 2px 0 15px 5px hsla(231, 94%, 7%, 0.06);
--shadow-3: 3px 3px var(--chinese-violet);
--shadow-4: 5px 5px var(--chinese-violet);

/*----BORDER RADIUS----*/
--radius-5: 5px;
--radius-10: 10px;

/*----CLIP PATH----*/
--polygon: polygon(100% 29%,100% 100%,19% 99%,0 56%);

/*----TRANSITION----*/
--transition-1: 0.25s ease;
--transition-2: 0.5s ease;
--cubic-out: cubic-bezier(0.33, 0.85, 0.4, 0.96);
}

/*----RESET----*/
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

li{ list-style: none; }

a,
img,
span,
data,
input,
button,
textarea,
ion-icon {
    display: block;
}

a{
    color: inherit;
    text-decoration: none;
}

img{
    height: auto;
}

input,
button,
textarea{
    background: none;
    border: none;
    font: inherit;
}

input,
textarea{
    width: 100%;
}

button{
    cursor: pointer;
}

address{
    font-style: normal;
}

.ion-icon{
    pointer-events: none;
}

html{
    font-family: var(--ff-poppins);
    font-size: 10px;
    scroll-behavior: smooth;
}

body{
    background-color: var(--white);
    color: var(--sonic-silver);
    font-size: 1.6rem;
    line-height: 1.8;
    height: 400vh;
}

:focus-visible { outline-offset: 4px};

::selection {
    background-color: var(--old-rose);
    color: var(--white);
}

::-webkit-scrollbar { width: 10px};

::-webkit-scrollbar-track {
    background-color: hsl(0, 0%, 98%);
}

::-webkit-scrollbar-thumb {
    background-color: hsl(0, 0%, 80%);
}

::-webkit-scrollbar-thumb:hover{
    background-color: hsl(0, 0%, 70%);
}

/*-----REUSED STYLE-----*/

.container { padding-inline: 15px; }

.section {
    padding-block: var(--section-padding);
}

.section:nth-child(odd) {
    background-color: var(--seashell);
}

.section-subtitle {
    color: var(--old-rose);
    text-transform: uppercase;
    font-weight: var(--fw-700);
    letter-spacing: 4px;
    text-align: center;
}

.h1,
.h2,
.h3,
.tab-text{
    color: var(--charcoal);
    font-family: var(--ff-philosopher);
    line-height: 1.2;
}

.h1{
    font-size: var(--fs-2);
}

.h2{
    font-size: var(--fs-3);
}

.h3{
    font-size: var(--fs-5);
}

.section-text{
    font-size: var(--fs-7);
}

.w-100 {
    width: 100%;
}

.has-before,
.has-after{
    position: relative;
    z-index: 1;
}

.has-before::before,
.has::after{
    content: "";
    position: absolute;
}

.section-title{
    text-align: center;
}

.grid-list {
    display: grid;
    gap: 25px;
}

.btn-link{
    color: var(--old-rose);
    font-weight: var(--fw-500);
    display: flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition-1);
}

.btn-link:is(:hover, :focus) {
    color: var(--chinese-violet);
}

.has-underline {
    position: relative;
    margin-block-end: 60px;
}

.has-underline .span{
    height: 2px;
    background-color: var(--old-rose_30);
    width: 200px;
    margin-inline: auto;
    margin-block-start: 30px;
}

.has-underline .has-before::before {
    width: 18px;
    height: 18px;
    top: 2px;
    left: 45%;
    transform: translateY(-50%) rotate(45deg);
    background-color: var(--old-rose_30);
    box-shadow: 7px -7px var(--old-rose_30);

}

.btn{
    padding: 12px 30px;
    transition: var(--transition-1);
}
.btn-secondary {
    background-color: var(--old-rose);
    color: var(--white);
}

.btn-secondary:is(:hover, :focus){
    background-color: var(--chinese-violet);
}


.img-holder{
    aspect-ratio: var(--width) / var(--height);
    background-color: var(--light-gray);
}

.img-cover{
    width:100%;
    height: 100%;
    object-fit: cover ;
}

.grid-section{
    display: grid;
    gap: 25px;
    margin-top: 25px;
}
/*-----HEADER-----*/

.header {
    background-color: var(--white);
    position: absolute;
    top: 10px;
    right: 10px;
    left: 10px;
    padding-block: 12px;
    z-index: 4;
    transition: var(--transition-2);
}

.header.active{
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    filter: drop-shadow(var(--shadow-1));
    transform: translate(-100%);
    transition: none;
    animation: slideIn 0.5s ease forwards;
}

.logo{
    width: 6rem;
}

@keyframes slideIn {
    0% { transform: translateY(-100%);}
    100% { transform: translateY(0);}
}

.header .container{
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-toggle-btn{
    font-size: 40px;
    color: var(--charcoal);
}

.nav-toggle-btn ion-icon{
    --ionicon-stroke-width: 20px;
}

.nav-toggle-btn.active .open,
.nav-toggle-btn .close { 
    display: none;
}

.nav-toggle-btn .open,
.nav-toggle-btn.active .close { 
    display: block;
}

.navbar {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--white);
    padding-inline: 15px;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: 0.25s var(--cubic-out);
}

.navbar.active{
    max-height: 300px;
    visibility: visible;
    transition-duration: 0.5s;
}

.navbar-list{
    margin-block-end: 10px;
}

.navbar-link {
    color: var(--charcoal);
    padding-block: 8px;
    line-height: 1.5;
    transition: var(--transition-1);
}

.navbar-link:is(:hover, :focus){
    color: var(--old-rose);
}

/*----HERO----*/
.hero{
   padding-block-start: calc(var(--section-padding) + 60px);
   text-align: center;
}

.hero .container {
    display: grid;
    gap: 60px;
}

.hero .hero-title{
    margin-block: 10px 25px;
}

.btn-secondary {
     margin-inline: auto;
}

.hero-banner{
    padding-inline-start: 30px;
    padding-block-end: 30px;
    max-width: 420px;
    margin-inline: auto;
}
.hero-banner .w-100{
    border-radius: 10px 30px;
}

/*-----BENEFITS-----*/

.benefits .section-text{
    text-align: center;
    margin-block: 8px 25px;
}
.benefits-card {
    padding: 25px;
    box-shadow: var(--shadow-2);
    border-radius: var(--radius-5);
    overflow: hidden;
    transition: var(--transition-2);
    background-color: var(--old-rose_30);
}

.benefits-card::before,
.benefits-card::after {
    bottom: 0;
    right: 0;
    clip-path: var(--polygon);
    transition: var(--transition-2);
}

.benefits-card::before {
    width: 80px;
    height: 80px;
    background-color: var(--old-rose_30);
    transform: translateY(60px);
}

.benefits-card::after{
    width: 70px;
    height: 70px;
    background-color: var(--chinese-violet_30);
    transform: translateY(65px);
}

.benefits-card:is(:hover, :focus-within){
    transform: translateY(-10px);
}

.benefits-card:is(:hover, :focus-within)::before,
.benefits-card:is(:hover, :focus-within)::after{
    transform: translateY(0);
}

.benefits-card:is(:hover, :focus-within)::after {
    transition-delay: 0.1s;
}

.benefits-card .card-icon {
    background-color: var(--old-rose);
    max-width: max-content;
    padding: 10px;
    box-shadow: var(--shadow-3);
    transition: var(--transition-1);
}

.benefits-card:is(:hover, :focus) .card-icon {
    box-shadow: none;
}

.benefits-card .card-title {
    margin-block: 20px 15px;
}

.beneifts-card .btn-link {
     margin-block-start: 15px;
}


/*-----CHAPTERS----*/

.chapter-card{
    height: 100%;
    background-color: var(--white);
    padding: 25px;
    border-radius: var(--radius-5);
    box-shadow: var(--shadow-2);
    transition: var(--transition-2);
}

.chapter-card:is(:hover, :focus-within) {
    transform: translateY(-10px);
}

.chapter-card .card-title {
    margin-block-end: 15px;
}

/*----AUTHOR----*/

.author{
    background-color: var(--seashell);
}

.author .container {
    display: grid;
    gap: 40px;
}

.author :is(.section-subtitle, .section-title) {
    text-align: left;
}

.section-title {
    margin-block-end: 30px;
}
.author-content {
    background-color: var(--white);
    padding: 30px;
}

.author .section-text {
    font-size: unset;
}

/*----ABOUT CLAVIMATE----*/

.section-clavimate {
    padding-left: 40px;
    padding-right: 40px;
    padding-bottom: 40px;
}

.points{
    list-style: disc;
}

.clavimate-for{
    margin: 20px;
}

/*----CONTACT----*/

.contact .wrapper {
    display: grid;
    gap: 25px;
}

.contact-form {
    background-color: var(--seashell);
    padding: 20px;
}

.input-field{
    background-color: var(--white);
    padding: 10px;
    margin-block-end: 15px;
    outline: none;
    border-block-end: 2px solid transparent; 
}

.input-field:focus {
    border-color: var(--old-rose);
}

textarea.input-field {
    resize: vertical;
    min-height: 120px;
    height: 120px;
    max-height: 200px;
}

.contact-form .btn {
    margin-inline: auto;
}

.contact-card {
    background-color: var(--seashell);
    padding: 30px;
}

.contact-card .card-title {
    font-family: var(--ff-philosopher);
    text-transform: uppercase;
    font-weight: var(--fw-700);
}

.contact-card > li:not(:last-child) {
    margin-block-end: 30px;
}

.contact-card .card-link {
    color: var(--chinese-violet);
    transition: var(--transition-1);
}

.contact-card .card-link:is(:hover, :focus) {
    color: var(--old-rose);
}

.social-list {
    display: flex;
    gap: 10px;
}

.social-link {
    background-color: var(--old-rose);
    color: var(--white);
    font-size: 20px;
    padding: 5px;
    box-shadow: var(--shadow-3);
    transition: var(--transition-1);
}

.social-link:is(:hover, :focus) {
    background-color: var(--chinese-violet);
    box-shadow: none;
}


.footer {
    padding: 15px;
    text-align: center;
    background-color: var(--seashell);
  }
  
  .footer-links,
  .footer-conditions {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links img {
    margin: 10px auto;
    width: 80px;
  }
  
  .footer-nav,
  .footer-book-list {
    padding: 0;
    list-style: none;
  }
  
  .footer-bottom {
    margin-top: 20px;
    font-size: 14px;
  }
  


/*----Media Queries (575px)----*/

@media (min-width: 575px) {

    :root{
        --fs-2: 4.5rem;
        --fs-3: 3.5rem;
        --fs-5: 2.5rem;
    }

    .container,
    .header,
    .navbar {
        margin-inline: auto;
        width: 100%;
        max-width: 540px;
    }

    .section-text {
        --fs-7: 2rem;
    }
    

    /*----HEADER-----*/

    .header {
        top:30px;
    }

    .header.active {
        max-width: unset;
    }

    .navbar {
        left: 50%;
        transform:translateX(-50%) ;
    }

    /*----CONTACT----*/
    .social-list-title {
        --fs-6:2.2rem;
    }

    .social-link {
        font-size: 25px;
        padding: 8px;
    }

    
    .footer {
        padding: 20px;
      }
    
      .footer-links {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 10px;
      }
    
      .footer-link-app img {
        width: 100px;
      }
    
      .footer-conditions {
        display: flex;
        justify-content: space-between;
        gap: 15px;
      }
    
      .footer-nav,
      .footer-book-list {
        text-align: left;
      }
    }
/*----Media Queries (768px)----*/

@media (min-width: 768px) {
    :root{
        --fs-2: 4.8rem;
    }

    .container,
    .header,
    .navbar {
        max-width: 720px;
    }

    .grid-list {
        grid-template-columns: 1fr 1fr;
    }

    .hero{
        padding-block-start: calc(var(--section-padding) + 100px) ;
        text-align: left;
    }
    
    .hero .container {
        grid-template-columns: 1fr 0.7fr;
        align-items: center;
    }

    .hero .section-subtitle {
        text-align: left;
    }

    .w-100{
        width: 33rem;
    }

    .benefits:is(.section-title, .section-text){
        text-align: left;
    }

    .benefits-content {
        grid-column: 1/3;
    }

    .btn-secondary {
        margin-inline:0;
   }

   /*---AUTHOR---*/
   .author .h2{
    --fs-3: 4.2rem;
   }

   /*---ABOUT CLAVIMATE---*/
   .btn2 {
    margin-inline: auto;
   }

   /*----CONTACT----*/
   .contact .wrapper {
    grid-template-columns: 1fr 1fr;
   }
  
   .footer {
    padding: 30px;
  }

  .footer-links {
    gap: 20px;
  }

  .footer-link-app img {
    width: 130px;
  }

  .footer-conditions {
    gap: 30px;
  }

} 

@media (min-width: 992px) {
    :root{
        --fs-2: 5.4rem;
        --fs-3: 4rem;
    }

    .container,
    .header,
    .navbar {
        max-width: 960px;
    }

    .grid-list {
        grid-template-columns: repeat(3, 1fr);
    }

    /*----HEADER----*/
    .header .container {
        padding-inline: 20px 30px;
    }

    .nav-toggle-btn {
        display: none;
    }

    .navbar, .navbar.active {
        all: unset;
    }

    .navbar-list {
        margin-block-end: 0;
        display: flex;
        gap: 30px;
    }

    /*----Benefits----*/
    .benefits .grid-list {
        grid-template-columns: repeat(3, 1fr);
        align-items: center;
    }

    /*---AUTHOR---*/
    .author .container {
        grid-template-columns: 0.6fr 1fr;
        gap: 0;
    }

    .author-content {
        margin-block-start: 40px;
        margin-inline-start: -30px;
        padding-block-end: 20px;
    }

    /*----CONTACT----*/

    .contact .wrapper {
        grid-template-columns: 1fr 0.5fr;
    }

    .contact-form {
        padding: 40px;
    }

    .footer {
        padding: 40px;
        display: flex;
        justify-content: space-between;
      }
    
      .footer-links,
      .footer-conditions {
        flex-direction: row;
      }
    
      .footer-nav,
      .footer-book-list {
        text-align: left;
      }
    
      .footer-bottom {
        text-align: center;
        margin-top: 30px;
        font-size: 16px;
      }
}

@media (min-width: 1200px) {
    :root{
        --fs-2: 6rem;
        --fs-3: 4.5rem;
        --fs-4: 3rem;
        --fs-5: 3rem;  
    }

    .container,
    .header,
    .navbar {
        max-width: 1140px;
    }

    .w-100{
        width: 38rem;
    }

    .author-content {
        padding:85px 50px 90px;
    }

    .footer {
        padding: 50px;
      }
    
      .footer-links {
        gap: 30px;
      }
    
      .footer-link-app img {
        width: 150px;
      }
    
      .footer-conditions {
        gap: 50px;
      }
    
      .footer-bottom {
        font-size: 18px;
      }

    }