body {
  user-select: none;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #f0f4fb;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  height: 100vh;
  color: #2e3a59;
}

.nav-container {
  position: fixed;
  top: 1%;
  width: 90vw;
  height: 70px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  border-radius: 10px;
}

.navBar {
  max-width: 900px;
  width: 90vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navBar h2 {
  margin: 0;
  font-size: 1.7rem;
  font-weight: 700;
  color: #273c75;
  letter-spacing: 1px;
}

.navBar ul {
  list-style: none;
  display: flex;
  margin: 0;
  padding: 0;
  gap: 20px;
}

.navBar ul li {
  margin: 0;
}

.navBar ul li a {
  color: #273c75;
  text-decoration: none;
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  display: flex;
  align-items: center;
}

#githubLogo:hover {
  transform: scale(1.2);
  transition: transform 0.3s ease;
}
.empty-div {
  width: 100vw;
  height: 100px;
}
.main-wrapper {
  display: flex;
  align-items: center;
  gap: 40px;
  max-width: 1100px;
  width: 95vw;
  margin: 100px auto 40px auto;
  box-sizing: border-box;
  min-height: 600px;
}

.quiz-creator {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  background: #ffffff;
  border-radius: 14px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  padding: 52px 0px;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  transition: transform 0.5s ease, box-shadow 0.5s ease;
  will-change: transform, box-shadow;
}

.quiz-creator h2 {
  font-weight: 700;
  font-size: 2.25rem;
  color: #1b2a49;
  margin-bottom: 28px;
  text-align: center;
  padding-bottom: 8px;
  letter-spacing: 0.06em;
}

.quiz-creator form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.quiz-creator label {
  font-weight: 600;
  font-size: 1.1rem;
  color: #34495e;
  margin-bottom: 6px;
  user-select: none;
}

#create-quiz-form {
  width: 100%;
}
.quiz-creator textarea,
.quiz-creator input[type="text"],
.quiz-creator select {
  padding: 12px 16px;
  border: 2px solid #bdc3c7;
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background-color: #fdfdfd;
  transition: border-color 0.3s ease;
  resize: vertical;
  min-height: 60px;
}
.quiz-creator textarea,
.quiz-creator input[type="number"],
.quiz-creator select {
  padding: 12px 16px;
  border: 2px solid #bdc3c7;
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background-color: #fdfdfd;
  transition: border-color 0.3s ease;
  resize: vertical;
  min-height: 60px;
}

.quiz-creator textarea:focus,
.quiz-creator input[type="text"]:focus,
.quiz-creator select:focus {
  outline: none;
  border-color: #3498db;
  background-color: #fcfdff;
  box-shadow: 0 0 10px rgba(52, 152, 219, 0.35);
}
.quiz-creator textarea:focus,
.quiz-creator input[type="number"]:focus,
.quiz-creator select:focus {
  outline: none;
  border-color: #3498db;
  background-color: #fcfdff;
  box-shadow: 0 0 10px rgba(52, 152, 219, 0.35);
}

#add-question-btn {
  margin-top: 16px;
  background: #3498db;
  color: white;
  border: none;
  padding: 14px 0;
  border-radius: 12px;
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 4px 15px rgba(52, 152, 219, 0.4);
  transition: background-color 0.3s ease, box-shadow 0.25s ease,
    transform 0.15s ease;
}

#add-question-btn:hover,
#add-question-btn:focus-visible {
  background: #2980b9;
  box-shadow: 0 6px 25px rgba(41, 128, 185, 0.6);
  transform: translateY(-2px);
  outline: none;
}

@media (max-width: 520px) {
  .quiz-creator {
    padding: 24px 20px;
    max-width: 100%;
  }
  #add-question-btn {
    font-size: 1rem;
    padding: 12px 0;
  }
}

.container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  width: 500px;
  height: 100%;
  text-align: center;
  transition: transform 0.5s ease, box-shadow 0.5s ease;
  will-change: transform, box-shadow;
}
h1 {
  margin-bottom: 30px;
  color: #1b2a49;
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: 1.2px;
}
#category-container {
    max-width: 400px;
    margin: 30px auto;
    padding: 15px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.category-btn {
    background: linear-gradient(45deg, #6b11cbcd, #2574fccd);
    border: none;
    color: white;
    font-size: 18px;
    font-weight: 600;
    padding: 14px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.1s ease;
    box-shadow: 0 3px 8px rgba(30, 144, 255, 0.4);
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.category-btn:hover {
    background: linear-gradient(45deg, #6a11cb, #2575fc);
    transform: scale(1.05);
    box-shadow: 0 6px 18px rgba(90, 11, 207, 0.6);
}

.category-btn:active {
    transform: scale(0.95);
    box-shadow: 0 2px 6px rgba(0, 191, 255, 0.5);
}

.category-btn:focus {
    outline: 3px solid #005f9e;
    outline-offset: 2px;
}


#question-text {
  margin-bottom: 20px;
  color: #374785;
  font-size: 1.2rem;
  font-weight: 600;
}

.eachMarks {
  text-align: right;
  color: #e74c3c;
  font-size: 1rem;
  margin-bottom: 12px;
  font-weight: 500;
}

#quiz-container {
  width: 80%;
}

#choices-list {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  list-style: none;
  padding: 0;
  margin: 18px 0 30px;
}

#choices-list li {
  background: #e8ecf7;
  margin: 10px 0;
  padding: 14px 20px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1.1rem;
  color: #354a75;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 1px 6px rgba(53, 74, 117, 0.15);
  user-select: none;
  width: 100%;
}

#choices-list li:hover {
  background: #d6dafb;
  box-shadow: 0 4px 14px rgba(53, 74, 117, 0.3);
}
button a {
  color: #fff;
  text-decoration: none;
}

button {
  background: linear-gradient(45deg, #6b11cbcd, #2574fccd);
  color: #ffffff;
  border: none;
  padding: 14px 30px;
  border-radius: 14px;
  cursor: pointer;
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 20px;
  box-shadow: 0 5px 15px rgba(106, 137, 204, 0.5);
  transition: background 0.3s ease, transform 0.2s ease;
  user-select: none;
  margin-bottom: 25px;
}

button:hover,
button:focus-visible {
  background: linear-gradient(45deg, #6a11cb, #2575fc);

  box-shadow: 0 8px 25px #3867d68d;
  transform: translateY(-2px);
  outline: none;
}

.hidden {
  display: none !important;
}

#result-container {
  margin-top: 28px;
}

#score,
#marks {
  font-size: 1.6rem;
  font-weight: 700;
  color: #27ae60;
  margin: 15px 0;
}

@keyframes shake {
  0% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-8px);
  }
  40% {
    transform: translateX(8px);
  }
  60% {
    transform: translateX(-8px);
  }
  80% {
    transform: translateX(8px);
  }
  100% {
    transform: translateX(0);
  }
}

.shake {
  animation: shake 0.35s;
  border: 3px solid #e74c3c;
  background-color: #ffe6e6;
  box-shadow: 0 0 12px #e74c3c;
  border-radius: 12px;
}
#startQuizBtn {
  margin-top: 16px;
  background: #3498db;
  color: white;
  border: none;
  padding: 14px 0;
  border-radius: 12px;
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 4px 15px rgba(52, 152, 219, 0.4);
  transition: background-color 0.3s ease, box-shadow 0.25s ease,
    transform 0.15s ease;
}
#result-message {
  margin-top: 20px;
  font-size: 1.4em;
  font-weight: 700;
  text-align: center;
  padding: 15px 20px;
  border-radius: 10px;
  user-select: none;
}

#result-message.pass {
  color: #145a32;
  background: #d4f1d4;
  box-shadow: 0 0 15px #2ecc71aa;
}

#result-message.fail {
  color: #c0392b;
  background: #ffddd7;
  box-shadow: 0 0 15px #e74c3caa;
}
#back-to-home {
  color: #fff;
  text-decoration: none;
}
@media (max-width: 900px) {
  .nav-container {
    width: 100%;
  }
  .main-wrapper {
    flex-direction: column-reverse;
    margin: 20px auto;
  }
  .quiz-creator {
    width: 100%;
  }
  .container {
    width: 100%;
    min-height: auto;
    padding: 52px 0px;
  }
}