body {
  font-family: 'Roboto', sans-serif;
  color: #434455;
  background-color: #ffffff;
}

/* reset  */

ul,
ol {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
}

a {
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  white-space: nowrap;
  clip-path: inset(100%);
  clip: rect(0 0 0 0);
  overflow: hidden;
}

/* common */

.container {
  max-width: 320px;
  padding: 0 16px;
  margin: 0 auto;
}

@media screen and (min-width: 768px) {
  .container {
    max-width: 768px;
  }
}

@media screen and (min-width: 1158px) {
  .container {
    max-width: 1158px;
    padding: 0 15px;
  }
}

.second-headers {
  font-size: 36px;
  line-height: 1.11;
  letter-spacing: 0.02em;
  text-align: center;
  color: #2e2f42;
}

.third-headers {
  font-weight: 500;
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-align: center;
  color: #2e2f42;
}

.paragraph {
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

.social-link {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #4d5ae5;
  border-radius: 50%;
  transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.social-icon {
  fill: #f4f4fd;
}

/* mobile first */

/* header */

.studio-header {
  border-bottom: 1px solid #e7e9fc;
  box-shadow: 0px 2px 1px rgba(46, 47, 66, 0.08),
    0px 1px 1px rgba(46, 47, 66, 0.16), 0px 1px 6px rgba(46, 47, 66, 0.08);
}

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

.logo {
  font-family: 'Raleway', sans-serif;
  font-weight: 700;
  font-size: 18px;
  line-height: 1.17;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #4d5ae5;
}

.header-logo {
  display: block;
  padding: 16px 0;
}

.header-logo .logo-part {
  color: #2e2f42;
}

.burger-button,
.nav-list,
.contacts {
  display: none;
}

@media (max-width: 767px) {
  .burger-button {
    display: block;
    padding: 0;
    border: none;
    background-color: transparent;
  }

  .icon-burger {
    display: block;
    fill: #2f2f37;
  }

  .mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 250ms cubic-bezier(0.4, 0, 0.2, 1),
      visibility 250ms cubic-bezier(0.4, 0, 0.2, 1);
  }

  .mobile-menu.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .mobile-menu-container {
    position: relative;
    padding-top: 72px;
    padding-bottom: 40px;

    display: flex;
    flex-direction: column;
    height: 100%;
  }

  .close-mobile-menu {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    top: 24px;
    right: 24px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    background-color: transparent;
    stroke-width: 1px;
  }

  .close-icon-mobile-menu {
    fill: #2e2f42;
  }

  .mobile-menu-nav {
    margin-bottom: auto;
  }

  .mobile-menu-nav-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
  }

  .mobile-menu-nav-link {
    font-weight: 700;
    font-size: 36px;
    line-height: 1.11;
    letter-spacing: 0.02em;
    color: #2e2f42;
  }

  .mobile-menu-nav-list li:first-child a {
    color: #404bbf;
  }

  .mobile-menu-contact {
    margin-bottom: 48px;
  }

  .mobile-menu-contact-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .mobile-menu-contact-link {
    font-style: normal;
    font-weight: 500;
    font-size: 20px;
    line-height: 1.2;
    letter-spacing: 0.02em;
    color: #434455;
  }

  .mobile-menu-contact-list li:first-child a {
    color: #4d5ae5;
  }

  .mobile-menu-social-link-list {
    display: flex;
    justify-content: flex-start;
    gap: 40px;
  }

  .mobile-menu-social-link-item {
    width: 40px;
    height: 40px;
  }
}

@media screen and (min-width: 768px) {
  .mobile-menu {
    display: none;
  }
  .header-nav {
    display: flex;
    align-items: center;
  }

  .header-logo {
    padding: 24px 0;
    margin-right: 120px;
  }

  .nav-list {
    display: flex;
    align-items: center;
    gap: 40px;
  }

  .nav-link {
    display: block;
    position: relative;
    color: #2e2f42;
    padding: 24px 0;
    font-weight: 500;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-list li:first-child a {
    color: #404bbf;
  }

  .nav-list li:first-child a::after {
    content: '';
    width: 100%;
    position: absolute;
    left: 0;
    bottom: -1px;
    height: 4px;
    background-color: #404bbf;
    border-radius: 2px;
  }

  .contacts {
    display: block;
    font-style: normal;
  }

  .contacts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .contact-link {
    display: block;
    font-size: 12px;
    line-height: 1.17;
    letter-spacing: 0.04em;
    color: #434455;
    transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1);
  }

  .active:hover,
  .active:focus {
    color: #404bbf;
  }
}

@media screen and (min-width: 1158px) {
  .header-logo {
    margin-right: 76px;
  }
  .contacts-list {
    flex-direction: row;
    align-items: center;
    gap: 40px;
  }

  .contact-link {
    padding: 24px 0;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
  }
}