.snake-title {
  position: relative;
  z-index: 2;
  text-align: center;
  margin-top: 40px;
}

.snake-title h1 {
  color: rgb(255, 255, 255);
  font-size: 3rem;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.6);
}

.score-container {
  position: relative;
  z-index: 2;
  text-align: center;
  color: rgb(234, 234, 234);
  font-size: 1.5rem;
  margin-top: 10px;
}

#snake-canvas {
  position: relative;
  z-index: 2;
  margin: 40px auto;
  display: block;
  background: rgba(0, 0, 0, 0.25);
  border: 2px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.35);
  border-radius: 8px;
}

#game-over-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(30, 30, 30, 0.45);
  backdrop-filter: blur(6px);
  justify-content: center;
  align-items: center;
  z-index: 9999;
  animation: fadeIn 0.4s ease forwards;
}

.game-over-visible {
  display: flex !important;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.game-over-box {
  background: linear-gradient(145deg, rgb(27, 29, 37), rgb(37, 40, 52));
  padding: 50px 60px;
  border-radius: 16px;
  text-align: center;
  color: rgb(255, 255, 255);
  box-shadow: 0 0 25px rgba(0, 0, 0, 0.45), 0 0 25px rgba(70, 130, 255, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.18);
  transform: scale(0.8);
  animation: popup 0.35s ease forwards;
  max-width: 700px;
  width: 95%;
}

@keyframes popup {
  from {
    transform: scale(0.75);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.game-over-box h2 {
  font-size: 2.4rem;
  margin-bottom: 12px;
  color: rgb(121, 170, 255);
  text-shadow: 0 0 10px rgba(121, 170, 255, 0.7);
  font-weight: 700;
  letter-spacing: 1.5px;
}

#final-score-text {
  font-size: 1.4rem;
  color: rgb(230, 230, 230);
  margin-bottom: 25px;
  text-shadow: 0 0 4px rgba(255, 255, 255, 0.3);
  font-weight: 300;
}

.game-over-buttons {
  margin-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.game-over-buttons button {
  flex: 1 1 45%;
  padding: 14px 0;
  font-size: 1.7rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  background: linear-gradient(145deg, rgb(74, 136, 255), rgb(52, 104, 214));
  color: rgb(255, 255, 255);
  transition: 0.25s ease;
  min-width: 150px;
}

.game-over-buttons button:hover {
  transform: translateY(-3px);
  background: linear-gradient(145deg, rgb(93, 153, 255), rgb(60, 116, 236));
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.45), 0 0 18px rgba(74, 136, 255, 0.75);
}

@media (max-width: 600px) {
  .game-over-buttons button {
    font-size: 1.4rem;
    padding: 10px 0;
    min-width: 120px;
  }

  .game-over-buttons {
    gap: 20px;
  }
}

@media (max-width: 400px) {
  .game-over-buttons button {
    font-size: 1.2rem;
    padding: 8px 0;
    min-width: 100px;
  }
}

#python-question-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  justify-content: center;
  align-items: center;
  z-index: 10000;
}

.modal-visible {
  display: flex !important;
}

.modal-box {
  background: rgb(27, 29, 37);
  color: rgb(255, 255, 255);
  padding: 40px 50px;
  border-radius: 16px;
  max-width: 900px;
  width: 95%;
  text-align: left;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.12);
  max-height: 90vh;
  overflow-y: auto;
}

#question-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.q-subtitle1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: rgb(138, 180, 255);
}

.q-subtitle2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: rgb(199, 215, 255);
}

.q-paragraph {
  font-size: 1.1rem;
  color: rgb(228, 228, 228);
}

.q-list ul {
  padding-left: 22px;
}
.q-list li {
  margin-bottom: 6px;
}

.q-code code {
  font-family: "JetBrains Mono", monospace;
  background: rgb(37, 40, 52);
  display: block;
  padding: 12px 16px;
  border-radius: 8px;
  overflow-x: auto;
}

.q-note {
  background: rgb(44, 47, 59);
  padding: 12px;
  border-left: 4px solid rgb(121, 170, 255);
  border-radius: 6px;
}

.q-tip {
  background: rgb(41, 57, 52);
  padding: 12px;
  border-left: 4px solid rgb(61, 214, 140);
  border-radius: 6px;
}

.q-image img {
  max-width: 100%;
  border-radius: 8px;
}

.q-table table {
  width: 100%;
  border-collapse: collapse;
}
.q-table td {
  border: 1px solid rgb(58, 61, 74);
  padding: 8px;
  color: rgb(228, 228, 228);
}

.q-collapsible button {
  width: 100%;
  background: rgb(37, 40, 52);
  color: rgb(255, 255, 255);
  border: none;
  padding: 12px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  text-align: left;
}

.q-collapsible-content {
  display: none;
  margin-top: 10px;
  padding-left: 10px;
}

.q-collapsible-content.open {
  display: block;
}

.options-mc {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 25px;
}

.opt-mc {
  padding: 18px;
  font-size: 1.15rem;
  font-weight: 700;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  color: rgb(255, 255, 255);
  transition: 0.25s ease;
  text-align: center;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
}

.opt-a {
  background: rgb(59, 130, 246);
}

.opt-a:hover {
  background: rgb(91, 155, 255);
}

.opt-b {
  background: rgb(239, 68, 68);
}

.opt-b:hover {
  background: rgb(255, 92, 92);
}

.opt-c {
  background: rgb(209, 163, 13);
}

.opt-c:hover {
  background: rgb(255, 227, 89);
}

.opt-d {
  background: rgb(34, 197, 94);
}

.opt-d:hover {
  background: rgb(63, 233, 124);
}

.options-tf {
  display: flex;
  gap: 16px;
  margin-top: 25px;
}

.options-tf button {
  flex: 1;
  padding: 18px 0;
  border-radius: 12px;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  color: rgb(255, 255, 255);
  font-weight: 700;
  transition: 0.25s ease;
}

.tf-true {
  background: rgb(74, 136, 255);
}

.tf-true:hover {
  background: rgb(93, 153, 255);
}

.tf-false {
  background: rgb(255, 77, 77);
}

.tf-false:hover {
  background: rgb(255, 102, 102);
}

#close-question-btn {
  margin-top: 20px;
  padding: 12px 20px;
  background: rgb(255, 82, 82);
  border: none;
  border-radius: 10px;
  color: rgb(255, 255, 255);
  cursor: pointer;
  font-size: 1.1rem;
  transition: 0.2s;
}

#close-question-btn:hover {
  background: rgb(255, 102, 102);
}

#answer-result-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(5px);
  justify-content: center;
  align-items: center;
  z-index: 10050;
}

.answer-box {
  background: rgb(28, 30, 38);
  padding: 50px 60px;
  border-radius: 16px;
  color: rgb(255, 255, 255);
  text-align: center;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
  max-width: 600px;
  width: 90%;
}

#answer-result-title {
  font-size: 3rem;
  margin-bottom: 20px;
  font-weight: 700;
  text-shadow: 0 0 6px rgba(0, 0, 0, 0.4);
}

#answer-result-correct-text {
  font-size: 1.4rem;
  margin-bottom: 25px;
  line-height: 1.5;
  white-space: pre-line;
}

#answer-result-btn {
  padding: 12px 22px;
  font-size: 1.2rem;
  background: rgb(74, 136, 255);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  color: rgb(255, 255, 255);
  transition: 0.25s;
}

#answer-result-btn:hover {
  background: rgb(93, 153, 255);
}