.container {
  width: 95%;
  margin: auto;
}

#topicDescriptionContainer {
  position: sticky;
  top: 80px;
  z-index: 50;
  display: inline-flex;
  flex-direction: column;
  gap: 10px;
  margin: 35px 0 25px 210px;
  padding: 20px 40px;
  border: var(--border-standard);
  border-radius: 10px;
  background:
    radial-gradient(circle at 30% 20%, rgba(255,255,255,0.05), transparent 60%),
    linear-gradient(145deg, rgba(255,255,255,0.03), rgba(0,0,0,0.4)),
    linear-gradient(145deg, #191F2C, #0C121E);
  box-shadow: var(--shadow-blue-on);
}

#topicDescriptionContainer p {
  margin: 0;
  color: var(--text-muted);
  font-size: 18px;
  font-weight: 100;
}

#topicDescriptionContainer span {
  margin-right: 10px;
  color: var(--text-accent-blue);
  font-size: 20px;
  font-weight: bold;
}

.exam-data-container {
  position: sticky;
  top: 68px;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  margin: 0 0 45px 0;
  padding: 40px 40px;
  border: var(--border-standard);
  border-radius: 10px;
  background:
    radial-gradient(circle at 30% 20%, rgba(255,255,255,0.05), transparent 60%),
    linear-gradient(145deg, rgba(255,255,255,0.03), rgba(0,0,0,0.4)),
    linear-gradient(145deg, #191F2C, #0C121E);
  box-shadow: var(--shadow-blue-on);
}

#examPadding {
  min-height: 550px;
}

#examParamsContainer {
  display: flex;
  justify-content: center;
  gap: 100px;  
}

.exam-header-text {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  font-weight: bold;
}

.exam-header-buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
}

.exam-header-buttons button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  min-width: max-content;
  line-height: 1;
  padding: 8px 16px;
  border: var(--border-button-outline);
  border-radius: 20px;
  color: var(--text-accent-blue);
  background: transparent;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  box-shadow: var(--shadow-blue-off);
  transition: 0.3s;
}
.exam-header-buttons button:hover {
  transform: translateY(-3px);
  color: var(--text-dark);
  background: var(--bg-button-outline-on);
  box-shadow: var(--shadow-dark);
}

.exam-header-buttons button:disabled {
  pointer-events: none;
  cursor: not-allowed;
  opacity: 0.6;
  box-shadow: none;
}

.exam-header-buttons i {
  margin-right: 10px;
}

.exam-header-timer {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 22px;
  font-weight: bold;
  font-variant-numeric: tabular-nums;
}

.success {
  color: var(--text-success);
}

.failed {
  color: var(--text-error);
}

#examResultContainer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
}

#examResultContainer p {
  margin: 0;
  font-size: 24px;
}

#examResultContainer a {
  color: var(--text-accent-blue);
  font-size: 24px;
  text-decoration: none;
  transition: 0.3s ease;
}

#examResultContainer a:hover {
  transform: translateY(-3px);
  color: var(--text-primary);
}

#questionsList {
  list-style-type: none;
  padding: 0 200px;
}

#questionsList li {
  margin: 50px 0;
  padding: 20px;
  border: var(--border-standard);
  border-radius: 14px;
  border-left: 4px solid var(--text-accent-blue);
  color: var(--text-dark);
  background:
    linear-gradient(180deg, #f2f5f9 0%, #e9eef5 100%),
    radial-gradient(circle at 1px 1px, rgba(0,0,0,0.01) 1px, transparent 0);
  background-size: 100% 100%, 30px 30px;
  box-shadow: var(--shadow-dark);
}

#questionsList li:first-child {
  margin-top: 0;
}

#questionsList li p {
  margin: 0 0 10px 0;
  font-size: 18px;
  font-weight: 600;
}

#questionsList li p span {
  margin-left: 5px;
  font-size: 16px;
  font-weight: 100;
  font-style: italic;
}

.question-text {
  margin-bottom: 10px;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: break-word;
  font-size: 16px;
  font-family: monospace;
}

.answer {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 10px 0;
  padding-bottom: 2px;
}

.answer-input {
  width: 16px;
  height: 16px;
  accent-color: var(--text-accent-blue);
  cursor: pointer;
}

.answer-label {
  flex: 1;
  white-space: normal;
  min-width: 0;
  font-size: 15px;
}

.verify-container {
  display: flex;
  justify-content: flex-end;
  margin-top: 20px;
}

.question-verify {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  min-width: max-content;
  line-height: 1;
  padding: 8px 16px;
  border: var(--border-button-outline);
  border-radius: 20px;
  color: var(--text-accent-blue);
  background: transparent;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  box-shadow: var(--shadow-blue-off);
  transition: 0.3s;
}
.question-verify:hover {
  transform: translateY(-3px);
  color: var(--text-dark);
  background: var(--bg-button-outline-on);
  box-shadow: var(--shadow-dark);
}

/* laptop 1600–1919px */
@media (min-width: 1600px) and (max-width: 1919px) {
  #topicDescriptionContainer {
    margin: 35px 0 25px 130px;
  }

  #examPadding {
    min-height: 500px;
  }

  #questionsList {
    padding: 0 120px;
  }
}

/* laptop 1366–1599px */
@media (min-width: 1366px) and (max-width: 1599px) {
  #topicDescriptionContainer {
    top: 70px;
    margin: 30px 0 20px 70px;
    padding: 15px 30px;
  }

  #topicDescriptionContainer p {
    font-size: 17px;
  }

  #topicDescriptionContainer span {
    font-size: 19px;
  }

  .exam-data-container {
    top: 62px;
    gap: 40px;
    padding: 30px 30px;
  }

  #examPadding {
    min-height: 420px;
  }

  #examParamsContainer {
    gap: 90px;  
  }

  .exam-header-text {
    font-size: 23px;
  }

  .exam-header-buttons {
    gap: 25px;
  }

  .exam-header-buttons button {
    padding: 7px 14px;
    font-size: 15px;
  }

  .exam-header-buttons i {
    margin-right: 8px;
  }

  .exam-header-timer {
    font-size: 21px;
  }

  #examResultContainer {
    gap: 25px;
  }

  #examResultContainer p {
    font-size: 23px;
  }

  #examResultContainer a {
    font-size: 23px;
  }

  #questionsList {
    padding: 0 60px;
  }

  #questionsList li {
    margin: 40px 0;
  }

  #questionsList li p {
    font-size: 17px;
  }

  #questionsList li p span {
    font-size: 15px;
  }

  .question-text {
    font-size: 15px;
  }

  .answer-input {
    width: 15px;
    height: 15px;
  }

  .answer-label {
    font-size: 14px;
  }

  .question-verify {
    padding: 7px 14px;
    font-size: 15px;
  }
}

/* laptop 1280–1365px */
@media (min-width: 1280px) and (max-width: 1365px) {
  #topicDescriptionContainer {
    top: 70px;
    margin: 30px 0 20px 40px;
    padding: 15px 30px;
  }

  #topicDescriptionContainer p {
    font-size: 16px;
  }

  #topicDescriptionContainer span {
    font-size: 18px;
  }

  .exam-data-container {
    top: 62px;
    gap: 35px;
    padding: 30px 30px;
  }

  #examPadding {
    min-height: 460px;
  }

  #examParamsContainer {
    gap: 80px;  
  }

  .exam-header-text {
    font-size: 22px;
  }

  .exam-header-buttons {
    gap: 25px;
  }

  .exam-header-buttons button {
    padding: 7px 14px;
    font-size: 14px;
  }

  .exam-header-buttons i {
    margin-right: 8px;
  }

  .exam-header-timer {
    font-size: 20px;
  }

  #examResultContainer {
    gap: 25px;
  }

  #examResultContainer p {
    font-size: 22px;
  }

  #examResultContainer a {
    font-size: 22px;
  }

  #questionsList {
    padding: 0 30px;
  }

  #questionsList li {
    margin: 40px 0;
  }

  #questionsList li p {
    font-size: 16px;
  }

  #questionsList li p span {
    font-size: 14px;
  }

  .question-text {
    font-size: 14px;
  }

  .answer-input {
    width: 15px;
    height: 15px;
  }

  .answer-label {
    font-size: 14px;
  }

  .question-verify {
    padding: 7px 14px;
    font-size: 14px;
  }
}

/* tablet */
@media (min-width: 768px) and (max-width: 1279px) and (orientation: portrait) {
  #topicDescriptionContainer {
    top: 72px;
    margin: 25px 0 15px 15px;
    padding: 12px 24px;
  }

  #topicDescriptionContainer p {
    font-size: 14px;
  }

  #topicDescriptionContainer span {
    font-size: 16px;
  }

  .exam-data-container {
    top: 68px;
    gap: 20px;
    padding: 20px 20px;
  }

  #examPadding {
    min-height: 900px;
  }

  #examParamsContainer {
    gap: 30px;  
  }

  .exam-header-text {
    font-size: 19px;
  }

  .exam-header-buttons {
    gap: 15px;
  }

  .exam-header-buttons button {
    padding: 6px 11px;
    font-size: 13px;
  }

  .exam-header-buttons i {
    margin-right: 6px;
  }

  .exam-header-timer {
    font-size: 18px;
  }

  #examResultContainer {
    gap: 20px;
  }

  #examResultContainer p {
    font-size: 20px;
  }

  #examResultContainer a {
    font-size: 20px;
  }

  #questionsList {
    padding: 0 5px;
  }

  #questionsList li {
    margin: 35px 0;
  }

  #questionsList li p {
    font-size: 15px;
  }

  #questionsList li p span {
    font-size: 13px;
  }

  .question-text {
    font-size: 13px;
  }

  .answer-input {
    width: 14px;
    height: 14px;
  }

  .answer-label {
    font-size: 13px;
  }

  .question-verify {
    padding: 7px 14px;
    font-size: 13px;
  }
}
@media (min-width: 768px) and (max-width: 1279px) and (orientation: landscape) {
  #topicDescriptionContainer {
    top: 68px;
    margin: 25px 0 15px 20px;
    padding: 15px 30px;
  }

  #topicDescriptionContainer p {
    font-size: 15px;
  }

  #topicDescriptionContainer span {
    font-size: 17px;
  }

  .exam-data-container {
    top: 62px;
    gap: 25px;
    padding: 25px 25px;
  }

  #examPadding {
    min-height: 500px;
  }

  #examParamsContainer {
    gap: 60px;  
  }

  .exam-header-text {
    font-size: 21px;
  }

  .exam-header-buttons {
    gap: 20px;
  }

  .exam-header-buttons button {
    padding: 7px 14px;
    font-size: 13.5px;
  }

  .exam-header-buttons i {
    margin-right: 8px;
  }

  .exam-header-timer {
    font-size: 19px;
  }

  #examResultContainer {
    gap: 20px;
  }

  #examResultContainer p {
    font-size: 21px;
  }

  #examResultContainer a {
    font-size: 21px;
  }

  #questionsList {
    padding: 0 10px;
  }

  #questionsList li {
    margin: 40px 0;
  }

  #questionsList li p {
    font-size: 16px;
  }

  #questionsList li p span {
    font-size: 14px;
  }

  .question-text {
    font-size: 14px;
  }

  .answer-input {
    width: 15px;
    height: 15px;
  }

  .answer-label {
    font-size: 14px;
  }

  .question-verify {
    padding: 7px 14px;
    font-size: 14px;
  }
}

/* smartphone */
@media (max-width: 767px) and (orientation: portrait) {
  #topicDescriptionContainer {
    top: 65px;
    margin: 25px 0 15px 15px;
    padding: 12px 24px;
  }

  #topicDescriptionContainer p {
    font-size: 13px;
  }

  #topicDescriptionContainer span {
    font-size: 15px;
  }

  .exam-data-container {
    top: 57px;
    gap: 20px;
    padding: 20px 10px;
  }

  #examPadding {
    min-height: 900px;
  }

  #examParamsContainer {
    flex-direction: column;
    gap: 20px;  
  }

  .exam-header-text {
    font-size: 18px;
  }

  .exam-header-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .exam-header-buttons button {
    padding: 6px 11px;
    font-size: 13px;
  }

  .exam-header-buttons i {
    margin-right: 6px;
  }

  .exam-header-timer {
    font-size: 17px;
  }

  #examResultContainer {
    gap: 10px;
  }

  #examResultContainer p {
    text-align: center;
    font-size: 16px;
  }

  #examResultContainer a {
    font-size: 16px;
  }

  #questionsList {
    padding: 0 5px;
  }

  #questionsList li {
    margin: 30px 0;
  }

  #questionsList li p {
    font-size: 14px;
  }

  #questionsList li p span {
    font-size: 12px;
  }

  .question-text {
    font-size: 12px;
  }

  .answer-input {
    width: 13px;
    height: 13px;
  }

  .answer-label {
    font-size: 12px;
  }

  .verify-container {
    margin-top: 15px;
  }

  .question-verify {
    padding: 6px 12px;
    font-size: 12px;
  }
}
@media (max-width: 767px) and (orientation: landscape) {
  #topicDescriptionContainer {
    top: 65px;
    margin: 25px 0 15px 15px;
    padding: 12px 24px;
  }

  #topicDescriptionContainer p {
    font-size: 13px;
  }

  #topicDescriptionContainer span {
    font-size: 15px;
  }

  .exam-data-container {
    top: 57px;
    gap: 20px;
    padding: 20px 10px;
  }

  #examPadding {
    min-height: 900px;
  }

  #examParamsContainer {
    gap: 40px;  
  }

  .exam-header-text {
    font-size: 18px;
  }

  .exam-header-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .exam-header-buttons button {
    padding: 6px 11px;
    font-size: 13px;
  }

  .exam-header-buttons i {
    margin-right: 6px;
  }

  .exam-header-timer {
    font-size: 17px;
  }

  #examResultContainer {
    gap: 10px;
  }

  #examResultContainer p {
    text-align: center;
    font-size: 16px;
  }

  #examResultContainer a {
    font-size: 16px;
  }

  #questionsList {
    padding: 0 5px;
  }

  #questionsList li {
    margin: 30px 0;
  }

  #questionsList li p {
    font-size: 14px;
  }

  #questionsList li p span {
    font-size: 12px;
  }

  .question-text {
    font-size: 12px;
  }

  .answer-input {
    width: 13px;
    height: 13px;
  }

  .answer-label {
    font-size: 12px;
  }

  .verify-container {
    margin-top: 15px;
  }

  .question-verify {
    padding: 6px 12px;
    font-size: 12px;
  }
}
@media (min-width: 768px) and (max-width: 915px) and (max-height: 500px) and (orientation: landscape) {
  #topicDescriptionContainer {
    top: 65px;
    margin: 25px 0 15px 15px;
    padding: 12px 24px;
  }

  #topicDescriptionContainer p {
    font-size: 13px;
  }

  #topicDescriptionContainer span {
    font-size: 15px;
  }

  .exam-data-container {
    top: 57px;
    gap: 20px;
    padding: 20px 10px;
  }

  #examPadding {
    min-height: 900px;
  }

  #examParamsContainer {
    gap: 40px;  
  }

  .exam-header-text {
    font-size: 18px;
  }

  .exam-header-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .exam-header-buttons button {
    padding: 6px 11px;
    font-size: 13px;
  }

  .exam-header-buttons i {
    margin-right: 6px;
  }

  .exam-header-timer {
    font-size: 17px;
  }

  #examResultContainer {
    gap: 10px;
  }

  #examResultContainer p {
    text-align: center;
    font-size: 16px;
  }

  #examResultContainer a {
    font-size: 16px;
  }

  #questionsList {
    padding: 0 5px;
  }

  #questionsList li {
    margin: 30px 0;
  }

  #questionsList li p {
    font-size: 14px;
  }

  #questionsList li p span {
    font-size: 12px;
  }

  .question-text {
    font-size: 12px;
  }

  .answer-input {
    width: 13px;
    height: 13px;
  }

  .answer-label {
    font-size: 12px;
  }

  .verify-container {
    margin-top: 15px;
  }

  .question-verify {
    padding: 6px 12px;
    font-size: 12px;
  }
}