style.css

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

.body {
  font-family: "Inter", sans-serif;
}

.logo {
  color: #28352f;
}

.nav_items {
  color: #3a4a42;
  text-decoration: none;
}

.header_nav {
  font-family: sans-serif;
  display: flex;
  min-height: 10vh;
  padding: 10px 20px;
  align-items: center;
}

.items_container {
  width: 90%;
  display: flex;
  flex-direction: row;
  align-items: center;
}

.header_menu {
  padding: 3px 5px;
  display: none;
}

.header_logo {
  font-size: 22px;
  font-weight: 700;
  line-height: 20px;
  animation-name: spin;
  animation-duration: 3s;
  animation-iteration-count: infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.header_logo a {
  text-decoration: none;
}

.menu_icon {
  width: 24px;
  height: auto;
}

.headline {
  background-size: auto;
  background-repeat: no-repeat;
  background-image: url(images/Header-llustration-desktop.png);
  background-position: center center;
  margin: 0 0 90px 0;
  height: 600px;
  width: 100%;
}

.headline_title {
  font-family: "Inter", sans-serif;
  margin-top: 60px;
  font-weight: 700;
  color: #172b4d;
  text-align: center;
}

.sub-headline_title_1,
.sub-headline_title {
  display: block;
}

.sub-headline_title {
  font-weight: 700;
  color: #36b37e;
  text-align: center;
}

.headline_content {
  color: #172b4d;
  font-weight: 400;
  background: #fff;
  text-align: center;
  font-size: 20px;
  max-width: 800px;
  margin: 0 auto;
}

.addline_social {
  display: flex;
  justify-content: center;
  align-items: center;
}

.social_links {
  display: flex;
  flex-direction: row-reverse;
  list-style: none;
  flex: none;
  order: 2;
  flex-grow: 0;
  justify-content: center;
}

.dropdown {
  text-align: center;
  margin: 25px 0;
}

.social_link a {
  display: inline-block;
  padding: 10px;
}

ul {
  list-style: none;
  padding: 0;
  width: 100%;
  justify-content: space-around;
  margin-top: 5%;
  flex-wrap: wrap;
}

li {
  margin: 0;
}

h1 {
  text-align: center;
  font-weight: 700;
  font-size: 3rem;
  color: #172b4d;
  margin-bottom: 5%;
  margin-top: 50px;
}

.aboutme_text {
  font-size: 20px;
  color: #42526e;
  padding-left: 10px;
  padding-right: 10px;
  line-height: 32px;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.aboutme_button {
  align-items: center;
  width: 150px;
  height: 50px;
  font-weight: 500;
  font-size: 17px;
  background-color: #36b37e;
  color: #fff;
  margin-top: 5%;
  border: none;
  border-radius: 4px;
  margin-bottom: 5%;
  text-align: center;
}

.about_card {
  background-color: #ebf0ee;
  flex-direction: column;
  justify-items: center;
  justify-content: space-around;
  align-content: center;
  border-radius: 8px;
  display: grid;
  border: 1px solid gray;
  width: 370px;
  height: 350px;
  margin: 16px;
}

.card {
  background-color: #ebf0ee;
  flex-direction: column;
  justify-items: center;
  justify-content: space-around;
  align-content: center;
  border-radius: 8px;
  display: grid;
  border: 1px solid gray;
  width: 370px;
  height: 565px;
}

.cards_container {
  display: grid;
  grid-template-columns: auto auto auto;
  place-content: center;
  gap: 20px;
}

h2 {
  color: #344534;
  margin-top: 5%;
}

.logo-img {
  margin-left: 5%;
  margin-bottom: 5%;
}

.logo-img1 {
  margin-left: 5%;
  margin-bottom: 5%;
}

.btn2 {
  height: 30px;
  border: none;
  border-radius: 4px;
  font-weight: 600;
  font-size: 12px;
  margin: 5px 5px;
  padding: 10px 17px;
  color: #36b37e;
  background-color: #fff;
}

.last-p_container {
  width: 50%;
}

.last-p {
  font-size: 40px;
  line-height: 52px;
  text-align: center;
  font-weight: 700;
  color: #172b4d;
  margin-top: 60px;
  padding: 0 10%;
  margin-bottom: 5%;
}

form {
  display: flex;
  flex-direction: column;
  margin-right: 10px;
  margin-left: 10px;
  align-items: center;
}

form input {
  margin-bottom: 5%;
  border: 1px solid #d0d9d4;
  width: 100%;
  padding: 15px 15px;
  border-radius: 4px;
}

textarea {
  width: 100%;
  height: auto;
  padding: 25px 15px;
  border: 1px solid #60c095;
  border-radius: 4px;
}

textarea:hover {
  border: 1px solid #36b37e;
}

.btn_container {
  width: 100%;
}

.link {
  text-decoration: none;
  text-align: center;
  font-size: 24px;
  color: #42526e;
  display: block;
}

.social_links1 {
  display: flex;
  list-style: none;
  flex: none;
  order: 2;
  flex-grow: 0;
  margin-left: 10%;
  width: 250px;
}

.img2 {
  width: 150px;
  height: 350px;
  position: absolute;
  right: 0;
  bottom: -60px;
  z-index: -1;
}

.img5 {
  width: 150px;
  height: 250px;
  position: absolute;
  top: 250px;
  z-index: -1;
}

.img6 {
  width: 100px;
  height: 150px;
  position: absolute;
  top: 300px;
  z-index: -1;
  left: 200px;
}

.enginn {
  position: relative;
  display: flex;
  flex-direction: row;
  margin: 95px auto 0 auto;
  width: 95%;
}

.form_container {
  width: 44%;
  margin: 35px 0 0 0;
}

.aboutme_container {
  display: flex;
  flex-direction: row;
}

#about-me {
  position: relative;
}

.about_content {
  width: 75%;
  margin: 5% auto;
}

.img3 {
  background-image: url(images/illustration-about\ me-1-desktop@2x.png);
  background-repeat: no-repeat;
  background-color: transparent;
  width: 200px;
  height: 200px;
  position: absolute;
  right: 0;
  bottom: 65%;
  background-size: contain;
}

.img4 {
  background-image: url(images/illustration-about-me-2-desktop@2x.png);
  background-repeat: no-repeat;
  background-color: transparent;
  width: 200px;
  height: 200px;
  position: absolute;
  left: 0;
  bottom: 0;
  background-size: contain;
}

.aboutme_btn_container {
  width: -moz-fit-content;
  width: fit-content;
  margin: 5% auto;
}

.batu {
  text-align: center;
  font-size: 40px;
  color: #172b4d;
  font-weight: 500;
}

.imgplacesholder {
  height: 250px;
  background-color: #ebf0ee;
}

.container {
  display: flex;
  flex-direction: column;
  border-radius: 10px;
  place-items: center;
  background: #fff;
  padding: 0 5px;
}

.engin {
  font-size: 33px;
  font-weight: 600;
  line-height: 44px;
  margin-top: 5%;
  color: #3a4a42 !important;
  font-family: inter, serif;
}

.eylem {
  float: left;
  padding-bottom: 20px;
}

.eylemm {
  display: flex;
  justify-content: center;
}

.irem {
  font-family: Inter, sans-serif;
  font-style: normal;
  font-weight: 600;
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.03cm;
  color: #3a4a42;
  flex: none;
  order: 0;
  flex-grow: 0;
  float: left;
  padding: 4px;
}

.btn1 {
  height: 30px;
  border: none;
  border-radius: 4px;
  color: #3a4a42;
  font-weight: 600;
  font-size: 12px;
  margin: auto;
  padding: 10px 17px;
  line-height: 16px;
  letter-spacing: 0.03em;
}

.btngreen {
  align-items: center;
  width: 150px;
  height: 50px;
  font-weight: 500;
  font-size: 17px;
  background-color: #36b37e;
  color: #fff;
  margin-top: 5%;
  border: none;
  border-radius: 4px;
  margin-bottom: 5%;
}

.btngreen1 {
  margin-top: 1.5em;
  margin-bottom: 5%;
  border: none;
  height: 50px;
  align-self: center;
  font-size: 17px;
  letter-spacing: 2px;
  padding: 1em 1.5em;
  color: #fff;
  border-radius: 4px;
  background-color: #36b37e;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.btngreen:hover {
  border-radius: 4px;
  background-color: #36b37e;
}

hr {
  width: 9%;
  height: 5px;
  margin-left: 45%;
  margin-bottom: 62px;
  margin-top: 3%;
  background-color: #36b37e;
  border-radius: 3px;
}

.footer-hr {
  width: 40%;
  background-color: #000;
  margin-top: 336px;
  margin-bottom: 3px;
  margin-left: 30%;
}

.header_nav_desktop_version {
  display: flex;
  flex-direction: row;
  justify-content: center;
  padding: 0;
  padding-top: 1em;
  margin: 0;
}

.header_nav_desktop_version li {
  list-style: none;
  padding: 0;
  margin: 1em;
  font-size: 14px;
  font-weight: bold;
}

.close_menu_icon {
  display: none;
}

#popup_window_container {
  background-color: #c1c7d0;
  box-sizing: content-box;
  width: 100vw;
}

.popup_window {
  display: inline-block;
  width: 85%;
  position: fixed;
  top: 45px;
  z-index: 1;
}

.popup_img {
  width: 95%;
  margin-block: 15px;
}

.popup_p {
  color: #344563;
  font-size: 18px;
}

.popup_buttoms {
  display: flex;
  gap: 30px;
}

.popup_x {
  position: relative;
  top: 115px;
  left: 39%;
}

.popup_engin {
  color: #172b4d;
  text-align: left;
}

@media only screen and (max-width: 768px) {
  .header_nav {
    justify-content: space-between;
  }

  .items_container {
    width: 10%;
  }

  .btn_container {
    width: auto;
  }

  .header_menu {
    display: flex;
  }

  .header_nav_desktop_version {
    display: none;
  }

  .headline {
    background-image: url(images/header-illsutration-mobile.png);
    background-size: contain;
    padding-top: 3%;
  }

  .cards_container {
    grid-template-columns: auto;
    gap: 20px;
  }

  .enginn {
    flex-direction: column;
  }

  .last-p_container,
  .form_container {
    width: auto;
  }

  .img2 {
    bottom: -120px;
  }

  .img5,
  .img6 {
    display: none;
  }

  .img3 {
    width: 100px;
    height: 120px;
    right: -20px;
  }

  .img4 {
    width: 120px;
    height: 100px;
    left: -20px;
  }

  .cansu_menu {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    height: 100vh;
  }

  .cansu_menu > li {
    font-size: 2rem;
  }

  .hide_menu {
    display: none;
  }

  #menu li {
    margin-top: 5px;
    margin-bottom: 10px;
    margin-left: 10px;
  }

  #menu li:first-child {
    display: flex;
    width: 85vw;
    justify-content: flex-end;
  }

  .close_menu_icon {
    display: block;
  }

  .popup_window {
    width: 90%;
    top: 30px;
  }

  .popup_x {
    left: calc(45.5% - 25px);
    position: relative;
    top: 55px;
  }
}

#error {
  color: lightcoral;
}