#navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #023e8a;
  z-index: 1000;
  width: 100%;
  height: 8vh;
  padding: 12px 20px;
  position: fixed;
  top: 0;
  left: 0;
  box-shadow: 0 1px 8px #023e8a;
}

#logo {
  width: 170px;
  height: 50px;
}

section.assignments {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 10vh;
  padding-bottom: 100px;
}

.assignment-container,
.calculator-container,
.dino-runner-container,
.it-assignment-3-container,
.it-assignment-4-container,
.it-assignment-7-container {
  position: relative;
  display: inline-block;
  background-color: white;
  border: 2px solid #ddd;
  border-radius: 10px;
  box-shadow: 0 -4px 8px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.1);
  padding: 20px;
  width: 90%;
  max-width: 70vw;
  height: auto;
  overflow: hidden;
  margin-top: 20px;
  margin-bottom: 80px;
}

.assignment-container aside h2,
.calculator-container aside h2,
.dino-runner-container aside h2,
.it-assignment-3-container > h2,
.it-assignment-4-container > h2,
.it-assignment-7-container > h2 {
  font-size: 2rem;
  color: #023e8a;
  margin-bottom: 20px;
}

.assignment-container aside h3,
.calculator-container aside h3,
.dino-runner-container aside h3 {
  font-size: 1.5rem;
  color: black;
  margin-top: 20px;
}

.assignment-container aside p,
.calculator-container aside p,
.dino-runner-container aside p {
  font-size: 1.4rem;
  color: #6c757d;
  line-height: 1.5;
  padding: 10px;
}

#cal-img,
#dino-runner-img {
  width: 800px;
  height: 500px;
  box-shadow: 4px 0 76px 10px rgba(184, 184, 184, 1);
}

#cal-img:hover,
#dino-runner-img:hover {
  box-shadow: 0 0 20px #023e8a;
}

.calculator-slider .calculator,
.dino-runner-slider .dino-runner {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

#source-code,
#live-demo {
  text-decoration: none;
  font-weight: bold;
  color: #023e8a;
}

#source-code:hover,
#live-demo:hover {
  text-decoration: underline;
}

.cert-nav-btn {
  background: none;
  border: none;
  margin: 0 55px;
}

.cert-nav-btn i {
  font-size: 5em;
  color: #023e8a;
  transition: all 0.3s ease;
}

.cert-nav-btn:hover i {
  color: black;
  transform: scale(1.1);
}

.tic-tac-toe-wrapper,
.pos-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  /* max-width: 1200px; */
  padding: 50px 0 50px 0;
  margin: 0 auto;
}

.tic-tac-toe-container,
.pos-container {
  position: relative;
  width: 900px;
  height: 420px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.tic-tac-toe-slider,
.pos-slider {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  position: relative;
}

.tic-tac-toe-slider > div,
.pos-slider > div {
  position: absolute;
  background-size: cover;
  background-position: center;
  box-shadow: 4px 0 76px 10px rgba(184, 184, 184, 1);
  transition: all 0.3s ease;
  cursor: pointer;
  width: 350px;
  height: 580px;
  z-index: 2;
}

.tic-tac-toe-slider > div:hover,
.pos-slider > div:hover {
  box-shadow: 0 0 20px #023e8a;
}

.pos-slider > div {
  width: 830px;
  height: 470px;
}

.case-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  justify-content: center;
  padding: 20px;
}

.case-box {
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #003566;
  color: white;
  text-decoration: none;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  font-size: 24px;
  font-weight: bold;
  transition: background-color 0.3s ease, transform 0.2s;
}

.case-box:hover {
  background-color: #000814;
  transform: scale(1.05);
}

@media (max-width: 768px) {
  .assignment-container,
  .calculator-container,
  .dino-runner-container,
  .it-assignment-3-container,
  .it-assignment-4-container,
  .it-assignment-7-container {
    max-width: 90vw;
  }

  section.assignments h1 {
    font-size: 2.6rem;
  }

  .assignment-container aside h2,
  .calculator-container aside h2,
  .dino-runner-container aside h2,
  .it-assignment-3-container > h2,
  .it-assignment-4-container > h2,
  .it-assignment-7-container > h2 {
    font-size: 1.8rem;
  }

  .assignment-container aside h3,
  .calculator-container aside h3,
  .dino-runner-container aside h3 {
    font-size: 1.4rem;
  }

  .assignment-container aside p,
  .calculator-container aside p,
  .dino-runner-container aside p {
    font-size: 1rem;
    line-height: 1.5;
  }

  .case-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-box {
    height: 160px;
    font-size: 22px;
  }
}

@media (max-width: 600px) {
  .assignment-container,
  .calculator-container,
  .dino-runner-container,
  .it-assignment-3-container,
  .it-assignment-4-container,
  .it-assignment-7-container {
    max-width: 95vw;
  }

  section.assignments h1 {
    font-size: 1.9rem;
  }

  .assignment-container aside h2,
  .calculator-container aside h2,
  .dino-runner-container aside h2,
  .it-assignment-3-container > h2,
  .it-assignment-4-container > h2,
  .it-assignment-7-container > h2 {
    font-size: 1.5rem;
  }

  .assignment-container aside h3,
  .calculator-container aside h3,
  .dino-runner-container aside h3 {
    font-size: 1.2rem;
  }

  .assignment-container aside p,
  .calculator-container aside p,
  .dino-runner-container aside p {
    font-size: 0.8rem;
    line-height: 1.3;
  }

  section.assignments {
    padding-bottom: 150px;
  }

  .case-container {
    grid-template-columns: repeat(1, 1fr);
  }

  .container {
    padding: 20px;
  }

  .case-box {
    height: 150px;
    font-size: 20px;
  }
}

@media (max-width: 425px) {
  .tic-tac-toe-container .tic-tac-toe-slider .tic-tac-toe img {
    width: 60vw;
    height: 15vh;
  }

  section.assignments h1 {
    font-size: 1.5rem;
  }

  .assignment-container aside h2,
  .calculator-container aside h2,
  .dino-runner-container aside h2,
  .it-assignment-3-container > h2,
  .it-assignment-4-container > h2,
  .it-assignment-7-container > h2 {
    font-size: 1.1rem;
  }

  .assignment-container aside h3,
  .calculator-container aside h3,
  .dino-runner-container aside h3 {
    font-size: 1rem;
  }

  .assignment-container aside p,
  .calculator-container aside p,
  .dino-runner-container aside p {
    font-size: 0.7rem;
    line-height: 1;
  }

  section.assignments {
    padding-bottom: 250px;
  }
}

@media (max-width: 375px) {
  section.assignments h1 {
    font-size: 1.2rem;
  }

  .assignment-container aside h2,
  .calculator-container aside h2,
  .dino-runner-container aside h2,
  .it-assignment-3-container > h2,
  .it-assignment-4-container > h2,
  .it-assignment-7-container > h2 {
    font-size: 0.8rem;
  }
}

@media (max-width: 1300px) {
  #cal-img,
  #dino-runner-img {
    width: 600px;
    height: 400px;
  }
}

@media (max-width: 900px) {
  #cal-img,
  #dino-runner-img {
    width: 400px;
    height: 250px;
  }
}

@media (max-width: 500px) {
  #cal-img,
  #dino-runner-img {
    width: 300px;
    height: 180px;
  }
}

@media (max-width: 1200px) {
  .tic-tac-toe-container,
  .pos-container {
    width: 800px;
    height: 380px;
  }

  .tic-tac-toe-slider > div {
    width: 300px;
    height: 500px;
  }

  .pos-slider > div {
    width: 500px;
    height: 300px;
  }

  .cert-nav-btn {
    margin: 0 40px;
  }

  .cert-nav-btn i {
    font-size: 4em;
  }
}

@media (max-width: 992px) {
  .assignment-container {
    flex-direction: column;
  }

  .tic-tac-toe-container,
  .pos-container {
    width: 700px;
    height: 350px;
  }

  .tic-tac-toe-slider > div {
    width: 280px;
    height: 450px;
  }
}

@media (max-width: 768px) {
  .tic-tac-toe-wrapper,
  .pos-wrapper {
    padding: 30px 0;
  }

  .tic-tac-toe-container,
  .pos-container {
    width: 100%;
    height: 340px;
    padding: 0 20px;
  }

  .pos-container {
    height: 180px;
  }

  .tic-tac-toe-slider > div {
    width: 250px;
    height: 400px;
  }

  .pos-slider > div {
    width: 100%;
    max-width: 500px;
    height: 300px;
  }

  .cert-nav-btn {
    margin: 0 20px;
  }

  .cert-nav-btn i {
    font-size: 3em;
  }
}

@media (max-width: 600px) {
  .tic-tac-toe-slider > div {
    width: 200px;
    height: 350px;
  }

  .pos-slider > div {
    height: 200px;
  }

  .cert-nav-btn {
    margin: 0 10px;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
  }

  #tic-tac-toe-left,
  #pos-left {
    left: 5px;
  }

  #tic-tac-toe-right,
  #pos-right {
    right: 5px;
  }

  .cert-nav-btn i {
    font-size: 2.5em;
  }

  .pos-container {
    height: 120px;
  }
}

@media (max-width: 480px) {
  .tic-tac-toe-slider > div {
    width: 180px;
    height: 300px;
  }

  .pos-slider > div {
    height: 200px;
    width: 200px;
  }

  .cert-nav-btn i {
    font-size: 2em;
  }

  .assignment-container aside h2 {
    font-size: 1.5rem;
  }

  .assignment-container aside h3 {
    font-size: 1.2rem;
  }

  .assignment-container aside p {
    font-size: 1rem;
  }

  .pos-container {
    height: 100px;
  }
}

@media (max-width: 375px) {
  .tic-tac-toe-slider > div {
    width: 150px;
    height: 250px;
  }

  .pos-slider > div {
    height: 180px;
  }

  .cert-nav-btn i {
    font-size: 1.8em;
  }
}

@media (max-width: 1400px) {
  .pos-slider > div {
    height: 360px;
    width: 550px;
  }
}

@media (max-width: 1200px) {
  .pos-slider > div {
    height: 260px;
    width: 450px;
  }
}

@media (max-width: 900px) {
  .pos-slider > div {
    height: 250px;
    width: 400px;
  }
}

@media (max-width: 768px) and (orientation: portrait) {
  .tic-tac-toe-container {
    height: 280px;
  }

  .tic-tac-toe-slider > div {
    height: 300px;
  }

  .pos-slider > div {
    height: 180px;
    width: 310px;
  }
}

@media (max-width: 530px) and (orientation: landscape) {
  .tic-tac-toe-container {
    height: 200px;
  }

  .tic-tac-toe-slider > div {
    height: 320px;
  }

  .pos-slider > div {
    height: 150px;
    width: 200px;
  }
}

@media (max-width: 500px) {
  .pos-slider > div {
    height: 110px;
    width: 200px;
  }
}

@media (max-width: 380px) {
  .pos-slider > div {
    height: 80px;
    width: 150px;
  }
}