/* rem and em do not depend on html font size in media query !
Insted 1rem = 1em = 16px
*/

/* ********** */
/* BELOW 1168px (Landscape Tablet) */
/* ********* */

@media (max-width: 73em) {
  /* 9px / 16px = 0.5625 = 56.25% */
  html {
    /* 8px / 16 = 0.5*/
    font-size: 50%;
  }

  .grid {
    column-gap: 6.4rem;
    row-gap: 6.4rem;
  }

  .header-section {
    padding: 0 3.2rem;
  }

  .hero {
    max-width: 120rem;
    grid-template-columns: 1fr 1.2fr;
    gap: 6.4rem;
  }
  .hero-descreption {
    margin-bottom: 3rem;
  }
  .notes {
    margin-bottom: 3rem;
  }

  .sucess,
  .customer-review {
    padding: 1.4rem;
  }
  .social-prove-box {
    margin-bottom: 1.2rem;
  }

  .heading-primary {
    font-size: 4.4rem;
  }
  .heading-secondary {
    font-size: 3rem;
  }
  .heading-tertiary {
    font-size: 2rem;
  }
}

/* ********** */
/* BELOW 850px (Tablet) */
/* ********* */

@media (max-width: 53.125em) {
  .grid--2--cols {
    row-gap: 4.4rem;
  }
  .hero {
    padding: 0 8rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 6.4rem;
    align-items: center;
  }

  .hero-text-box {
    text-align: center;
  }
  .social-prove-box {
    justify-content: center;
    gap: 3.2rem;
  }
  .hero-input {
    margin: 0 auto;
  }
  .hero-img {
    margin: 0 auto;
    width: 65%;
  }

  .purbel {
    top: 120%;
    left: 45%;
    box-shadow: rgba(64, 202, 226, 0.184) 0 0 20rem 22rem;
  }

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

  .features-box {
    flex-direction: column-reverse;
  }

  .feature-img {
    width: 50%;
    margin: 0 auto;
  }

  .grid--6--cols,
  .grid--4--cols {
    grid-template-columns: repeat(3, 1fr);
  }
  .slide {
    grid-template-columns: 1fr;
    transform: translateY(-17%);
  }

  .testimonial-img {
    display: none;
  }

  /* a URL IMAGE WITH NO CONTENT TO DESIDE ITS HEITE */
  .testimonial-img-url {
    display: block;
  }

  .dots {
    bottom: 5%;
  }

  .app-img {
    width: 90%;
  }

  .download-box {
    flex-direction: column;
    align-items: flex-start;
  }

  .ios-box,
  .googlePlay-box {
    flex-grow: 1;
  }

  .ios-box i.fa-apple,
  .googlePlay-box img {
    width: 3rem;
    height: 3rem;
  }

  /* MOBILE NAVIGATION */
  .btn-mobile-nav {
    display: block;
    z-index: 999;
  }

  .icon-mobile-nav {
    display: block;
  }

  .main-nav {
    background-color: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    transform: translateX(100%);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.5s ease-in;
    /* HIDE THE NAVIGATION */
    /* no transations can be added to display */

    /* 1) Hide it visually */
    /* Opacity can be animated */
    opacity: 0;
    /* 2) Make it unaccessible to mouse and keyboard */
    pointer-events: none;
    /* 3) Hide it from screen readers */
    visibility: hidden;
  }

  /* schow the main-nav by nav-open */
  .nav-open .main-nav {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
    transform: translateX(0);
    z-index: 999;
  }

  /* only when .nav-open exist */
  .nav-open .icon-mobile-nav[name="close-outline"] {
    display: block;
  }

  .nav-open .icon-mobile-nav[name="menu-outline"] {
    display: none;
    /* animation not nessasry */
  }

  .main-nav-list {
    flex-direction: column;
    gap: 4.8rem;
  }
  .main-nav-link:link,
  .main-nav-link:visited {
    font-size: 3rem;
  }

  /* Small Footer */

  .grid--footer {
    grid-template-columns: repeat(6, 1fr);
  }
  .nav-col {
    grid-row: 1;
    grid-column: span 2;
    margin-bottom: 3.2rem;
  }

  .logo-col,
  .address-col {
    grid-column: span 3;
  }
}
/* ************ */
/* BELOW 552pxpx phone */
/* ************ */

@media (max-width: 34.5em) {
  .hero {
    padding: 0 2.4rem;
  }
  .purbel {
    box-shadow: rgba(64, 202, 226, 0.084) 0 0 20rem 22rem;
  }

  .grid--6--cols,
  .grid--4--cols {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
  .features-box {
    /* flex-direction: row; */
    /* for the contetn */
    align-items: flex-start;
  }
  .slide {
    transform: translateY(-10%);
  }

  .app-grid {
    grid-template-columns: 1fr;
  }
  .app-img-box {
    grid-row: 1/2;
  }
  .app-img {
    width: 50%;
  }
  .download-box {
    flex-direction: row;
  }
}

/* ************ */
/* BELOW 400px */
/* ************ */

@media (max-width: 34.5em) {
  .download-box {
    flex-direction: column;
  }
}

/* - Font System

10/ 12/ 14/ 16/ 18/ 20/ 24/ 30/ 36/ 44/ 52/ 62/ 74/ 86/ 98px

- Space system

2 / 4/ 8/ 12/ 16/ 24/ 32/ 48/ 64/ 80/ 96/ 128px */