.main-library {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: start;
  width: 100%;
  height: calc(100vh - 200px);
  margin: 0 auto;
  z-index: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.back-btn {
  scale: 1;
  transition: scale 0.3s ease;
}
.back-btn:hover {
  scale: 1.1;
}

.background-objects {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background-position: bottom;
  z-index: 0;
}

.background-dot1,
.background-dot2,
.background-wave {
  z-index: 0;
}

.background-dot1 {
  top: 50%;
  left: 0;
}

.background-dot2 {
  top: 50%;
  right: 0;
}

.background-wave img {
  position: absolute;
  height: 100vh;
  overflow: hidden;
  width: 100%;
  bottom: 0;
  top: 0;
  left: 0;
  right: 0;
  z-index: 0;
  pointer-events: none;
}

.headline {
  font-family: "Gugi", sans-serif;
  color: var(--text-color-green);
}

h1 {
  font-size: var(--font-size-98);
  margin: 0;
}

h3 {
  font-size: var(--font-size-56);
  margin: 0;
}

.input {
  border: 3px solid var(--border-color-green);
  border-radius: 48px;
  width: 100%;
  color: var(--text-color-bluelight);
  font-size: var(--font-size-24);
}

.input::placeholder {
  color: var(--text-color-bluelight);
  font-size: var(--font-size-24);
}

.input-container {
  background: none;
  width: 40%;
  position: relative;
}

.btn {
  width: 200px;
  background: var(--bg-color-green);
  color: var(--text-color-blue);
  cursor: pointer;
}

.btn:hover {
  background: var(--bg-color-green);
}

.wrapping-container {
  padding: 40px;
  box-sizing: border-box;
  z-index: 1;
  position: relative;
  align-items: flex-start;
  width: 90vw;
  max-width: 1440px;
}

#quiz-container-library {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, auto);
  gap: 24px;
  padding: 16px 0;
}

.quiz-title {
  color: var(--text-color-green);
}

.quiz-card {
  color: var(--text-color-green);
  border-radius: 18px;
  background: rgba(63, 255, 104, 0.2);
  padding: 16px;
  cursor: pointer;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  z-index: 10;
}

.overlay img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  object-fit: cover;
  pointer-events: none;
  z-index: 11;
}

@media (max-width: 1300px) {
  h1 {
    font-size: var(--font-size-48);
  }

  h3 {
    font-size: var(--font-size-32);
  }
}

@media (max-width: 1200px) {
  #quiz-container-library {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, auto);
    padding: 0 10px 0 10px;
  }
}

@media (max-width: 700px) {
  .header {
    position: fixed;
    z-index: 6;
    backdrop-filter: blur(8px);
  }

  .input {
    width: 220px;
  }

  h1 {
    font-size: var(--font-size-36);
  }

  h3 {
    font-size: var(--font-size-24);
  }

  .wrapping-container {
    width: unset;
  }
}

.overlay img {
  width: 400px;
  height: 400px;
}

@media (max-width: 375px) {
  h1 {
    font-size: var(--font-size-32);
  }

  h3 {
    font-size: var(--font-size-20);
  }

  .input {
    font-size: var(--font-size-16);
    padding: 8px 12px;
    height: 42px;
  }

  .btn {
    width: 100%;
    font-size: var(--font-size-20);
    padding: 12px;
    margin-top: 24px;
  }

  .headline-green {
    font-size: var(--font-size-28);
    text-align: center;
  }

  .quiz-card {
    padding: 12px;
    font-size: var(--font-size-16);
  }

  .overlay img {
    width: 200px;
    height: 200px;
  }

  .footer a {
    padding: 0;
    text-align: center;
  }

  .header-icon {
    width: 140px;
  }

  .header-icon img {
    width: 60px;
    height: 20px;
  }

  .header-icon::after {
    font-size: var(--font-size-16);
  }
}

@media (max-width: 320px) {
  h1 {
    font-size: 28px;
  }

  h3 {
    font-size: 18px;
  }

  .btn {
    font-size: var(--font-size-18);
    cursor: pointer;
  }

  .quiz-card {
    font-size: var(--font-size-14);
    padding: 10px;
  }

  .overlay img {
    width: 160px;
    height: 160px;
  }
}