* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: sans-serif;
}

header {
  background-color: rgb(232, 232, 235);
}
.nav {
  display: flex;
  justify-content: space-between;
  padding: 20px 60px;
}
.logo {
  display: flex;
  margin: 20px;
  text-transform: uppercase;
}
.logo > h1 {
  font-size: 30px;
  font-weight: 600;
  letter-spacing: 0.8px;
  line-height: 1.2;
}

.navbar > ul {
  display: flex;
  margin-top: 5px;
}
.navbar > ul > li {
  list-style: none;
  margin: 20px;
}
.navbar > ul > li > a {
  text-decoration: none;
  color: black;
}
.navbar > ul > li > a:hover {
  border-bottom: 2px solid black;
  padding-bottom: 5px;
}
.active {
  border-bottom: 2px solid black;
  padding-bottom: 5px;
}
/* header ends  */

.barsolid-icon {
  position: absolute;
  height: 30px;
  top: 40px;
  right: 100px;
  display: none;
}
.barsolid-icon > img {
  height: 100%;
}

.index-icon {
  display: flex;
  justify-content: flex-end;
  margin: -90px 130px 10px 10px;
  font-weight: 900;
  font-size: 40px;
  display: none;
  cursor: pointer;
}
.side-solid {
  position: absolute;
  top: 30px;
  background-color: white;
  margin-top: 60px;
  height: 250px;
  width: 100%;
  padding: 10px;
  display: none;
  cursor: pointer;
}
.side-solid > ul > li {
  list-style: none;
  padding: 15px;
  border-bottom: 1px solid #c1c1c1;
  width: 725px;
}
.side-solid > ul > li > a {
  text-decoration: none;
  color: #000;
}

/* about  */
.about {
  margin: 85px;
  padding-top: 25px;
}

.about-usTalks {
  font-weight: 500;
  letter-spacing: 0.3;
  padding-bottom: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.about-usTalks > h5 {
  font-size: 16px;
  line-height: 18px;
}
.about-usTalks > h1 {
  font-size: 30px;
  padding: 0 0 23px;
  line-height: 1;
}

.all-images {
  display: flex;
  justify-content: space-around;
  padding-bottom: 23px;
  margin: 20px;
}
.about-usImage {
  height: 400px;
  width: 350px;
  margin: 20px;
}
.about-usImage > img {
  height: 100%;
  width: 100%;
}
.about-uslink {
  display: flex;
  justify-content: center;
  margin-bottom: 60px;
}
.about-uslink > a {
  text-decoration: none;
  color: #fff;
  background-color: #000;
  padding: 15px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 4px 8px 0 rgb(0 0 0 / 20%);
  font-size: 15px;
  font-weight: 700;
}
.about-talks {
  display: flex;
  justify-content: space-around;
  margin: 100px 0 100px 0;
}
.vission > h3,
.mission > h3,
.goal > h3 {
  padding-bottom: 20px;
}
.vission > p,
.mission > p,
.goal > p {
  max-width: 300px;
  line-height: 24px;
  font-size: 14px;
  font-weight: 400;
  padding-bottom: 10px;
}

/* about ends  */

/* footer  */
footer {
  padding: 35px 65px;
  margin-top: 90px;
  color: #000;
  background-color: rgb(232, 232, 235);
  font-size: 14px;
  font-weight: 400;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
footer > h2 {
  text-align: center;
  line-height: 24px;
  padding: 20px;
  font-size: 24px;
}
footer > p {
  line-height: 28px;
  padding-bottom: 20px;
  word-wrap: break-word;
  max-width: 500px;
}
.social-media > ul {
  display: flex;
}
.social-media > ul > li {
  list-style: none;
}
.social-media > ul > li > a > img {
  height: 20px;
  margin: 10px;
}
.line {
  background-color: #000;
  width: 20px;
  height: 2px;
  margin-top: 20px;
}
.copy-right {
  display: flex;
  gap: 5px;
  padding: 20px 0px 0px;
  margin: 30px 0px 0px;
  border-top: 1px solid #000;
  text-align: center;
}

/* footer ends */

/* media query  */
@media (max-width: 964px) {
  header {
    padding-top: 20px;
  }
  .navbar > ul {
    display: none;
  }
  .barsolid-icon {
    height: 40px;
    top: 48px;
    display: flex;
  }
  .index-icon {
    display: none;
    text-align: end;
    margin: -90px 130px 10px 10px;
    font-weight: 900;
    font-size: 40px;
  }
  .about-usTalks > p {
    font-size: 18px;
  }
  .vission > p,
  .mission > p,
  .goal > p {
    max-width: 280px;
    font-size: 19px;
  }
  .contact-social {
    padding: 120px 50px 165px 40px;
    font-size: 18px;
  }
  footer > p {
    max-width: 550px;
    font-size: 18px;
  }

  .copy-right {
    font-size: 18px;
  }
}
@media (max-width: 808px) {
  .logo > h1 {
    font-size: 28px;
    font-weight: 550;
  }
  .barsolid-icon {
    height: 38px;
  }
}
@media (max-width: 793px) {
  .about-usImage {
    height: 300px;
    width: 200px;
  }
}
@media (max-width: 778px) {
  .logo > h1 {
    font-size: 25px;
    font-weight: 550;
  }
  .barsolid-icon {
    height: 36px;
  }

  footer {
    font-size: 12px;
  }
  footer > h2 {
    line-height: 20px;
    font-size: 22px;
  }
}
@media (max-width: 737px) {
  .about-usImage {
    height: 280px;
    width: 180px;
  }
  .vission > p,
  .mission > p,
  .goal > p {
    max-width: 250px;
  }
}
@media (max-width: 699px) {
  .about-usImage {
    height: 230px;
    width: 160px;
  }
  .vission > p,
  .mission > p,
  .goal > p {
    max-width: 230px;
    line-height: 20px;
    font-size: 15px;
  }
}
@media (max-width: 680px) {
  .logo > h1 {
    font-size: 23px;
  }
  .barsolid-icon {
    height: 33px;
  }

  .about-usImage {
    height: 220px;
  }
  footer > p {
    font-size: 15px;
  }
  .copy-right {
    font-size: 15px;
  }
}
@media (max-width: 651px) {
  .about-usImage {
    height: 200px;
    width: 140px;
  }
}
@media (max-width: 650px) and (min-width: 280px) {
  .nav {
    padding: 20px 30px;
  }
  .barsolid-icon {
    height: 30px;
  }

  .about {
    margin: 50px;
  }

  .about-usTalks > h5 {
    font-size: 13px;
    line-height: 15px;
  }
  .about-usTalks > h1 {
    font-size: 25px;
    padding: 0 0 23px;
  }

  .all-images {
    display: grid;

    margin: 20px;
  }
  .about-usImage {
    height: 300px;
    width: 250px;
  }
  .about-usImage > img {
    padding-bottom: 23px;
  }
  .about-talks {
    display: grid;
    margin: 100px 0 80px 0;
  }
  .vission > h3,
  .mission > h3,
  .goal > h3 {
    padding-bottom: 10px;
  }
  .vission > p,
  .mission > p,
  .goal > p {
    max-width: 300px;
    line-height: 24px;
    font-size: 14px;
    font-weight: 400;
    padding-bottom: 20px;
  }
}
@media (max-width: 641px) {
  .nav {
    padding: 20px 25px;
  }
}
@media (max-width: 591px) {
  .nav {
    padding: 20px 20px;
  }
  .barsolid-icon {
    height: 30px;
  }
}
@media (max-width: 561px) {
  .barsolid-icon {
    height: 20px;
    left: 470px;
  }
}
@media (max-width: 517px) {
  .barsolid-icon {
    left: 400px;
    top: 55px;
  }
}

@media (max-width: 461px) {
  .barsolid-icon {
    left: 350px;
  }
}

@media (max-width: 407px) {
  .barsolid-icon {
    left: 300px;
  }
}

@media (max-width: 351px) {
  .barsolid-icon {
    left: 250px;
  }

  .about-usImage {
    height: 250px;
    width: 200px;
  }
}