:root{
  --headline:#304862;
  --hover:#de4640;
  --hover-dark:#c73f39;
  --text:#4d647e;
  --muted:#6b869c;

  --card-bg:#f7f9fb;
  --border:#e0e6ec;
  --shadow:0 10px 26px rgba(48,72,98,.18);
  --shadow2:0 14px 34px rgba(48,72,98,.22);
}

.quiz-inner{
  width: min(980px, 92%);
  margin: 0 auto;
}

.leaderboard-container{
  width: min(980px, 92%);
  margin: 1.2rem auto 0;
  background:#fff;
  border:1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow:hidden;
}

.leaderboard-header{
  padding: .9rem 1rem;
  background: var(--card-bg);
  border-bottom:1px solid var(--border);
  text-align:center;
}

.leaderboard-header h2{
  margin:0;
  color:var(--headline);
  font-weight:700;
  letter-spacing:.2px;
  font-size: 1.25rem;
}

.leaderboard-table{
  padding: .8rem 1rem 1rem;
}

.leaderboard-table table{
  width:100%;
  border-collapse: collapse;
  font-weight: 400;
  color: var(--text);
}

.leaderboard-table th,
.leaderboard-table td{
  padding: .75rem .65rem;
  border-bottom:1px solid var(--border);
}

.leaderboard-table th{
  text-align:left;
  color: var(--headline);
  font-weight:700;
}

.leaderboard-table tbody tr:hover{
  background: rgba(48,72,98,.04);
}

.quizzes-section{
  padding: 1rem 0 1.25rem;
}

.quizzes-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.quiz-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.quiz-card:hover{
  transform: translateY(-3px);
  box-shadow: var(--shadow2);
  border-color: rgba(48,72,98,.18);
}

.quiz-card__media{
  display:block;
  aspect-ratio: 16/9;
  background:#e9eef4;
  overflow:hidden;
}

.quiz-card__img{
  width:100%;
  height:100%;
  object-fit: cover;
  display:block;
  transition: transform .35s ease;
}

.quiz-card:hover .quiz-card__img{
  transform: scale(1.04);
}

.quiz-card__title{
  margin:0;
  padding: .85rem .95rem 1rem;
  text-align:center;
  color: var(--headline);
  font-weight:700;
  letter-spacing: .2px;
  font-size: 1.05rem;
  line-height: 1.25;
}

.quiz-card__title-link{
  color: inherit;
  text-decoration:none;
}

.quiz-card__title-link:hover{
  color: var(--hover);
}

.quizzes-empty-section{
  padding: 1rem 0 1.25rem;
}

.quizzes-empty{
  background:#fff;
  border:1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 1.1rem;
  text-align:center;
}

.quizzes-empty h4{
  margin:0;
  color: var(--headline);
  font-weight:700;
}

.quiz-page{
  padding: 1rem 0 1.25rem;
}

.quiz-page__title{
  margin: .35rem 0 .85rem;
  color: var(--headline);
  font-weight:700;
  letter-spacing:.2px;
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  line-height: 1.2;
  text-align:center;
}

.quiz-page__image{
  width:100%;
  height:auto;
  margin-bottom: 1.35rem;
  border-radius: 18px;
  border:1px solid var(--border);
  box-shadow: var(--shadow);
  display:block;
  background:#e9eef4;
}

.quiz-page__description{
  margin: 1rem 0 0;
  color: var(--text);
  line-height: 1.75;
  font-size: 1.02rem;
  text-align: justify;
}

.quiz-btn{
  appearance:none;
  -webkit-appearance:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width: 200px;
  padding: .85rem 2rem;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,0);
  background: var(--headline);
  color:#fff !important;
  font-weight:700;
  font-size: 1rem;
  letter-spacing:.2px;
  text-decoration:none;
  cursor:pointer;
  box-shadow: 0 10px 22px rgba(48,72,98,.22);
  transition: transform .08s ease, box-shadow .2s ease, filter .2s ease;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif !important;
}

.quiz-btn:hover{
  transform: translateY(-1px);
  filter: brightness(1.06);
  box-shadow: 0 16px 34px rgba(48,72,98,.30);
}

.quiz-btn:active{
  transform: translateY(0);
  filter: brightness(.98);
}

.quiz-btn:focus-visible{
  outline:none;
  box-shadow: 0 0 0 4px rgba(48,72,98,.18), 0 16px 34px rgba(48,72,98,.30);
}

.quiz-btn--primary{
  background: var(--headline);
}

.quiz-page a.quiz-btn.quiz-btn--primary:hover,
.quiz-question a.quiz-btn.quiz-btn--primary:hover,
.quizzes-section a.quiz-btn.quiz-btn--primary:hover{
  background: var(--headline) !important;
  color: #fff !important;
  text-decoration: none !important;
}

.quiz-start-btn{
  display: flex;
  width: fit-content;
  margin: .95rem auto 0;
}

.quiz-question-title{
  padding: 1rem 0 .5rem;
}

.quiz-question-title__text{
  margin: 0;
  text-align:center;
  color: var(--headline);
  font-weight:700;
  letter-spacing: .2px;
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  line-height: 1.25;
}

.first-attempt-message{
  margin: .85rem auto 0;
  max-width: 760px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  color: #7c2d12;
  border-radius: 14px;
  padding: .75rem .85rem;
  font-weight: 600;
  line-height: 1.5;
}

.quiz-question{
  padding: .6rem 0 1.25rem;
}

.quiz-question__image{
  width:100%;
  margin-bottom: 1.35rem;
  border-radius: 18px;
  border:1px solid var(--border);
  box-shadow: var(--shadow);
  display:block;
  background:#e9eef4;
}

.quiz-question__progress{
  margin: 1.35rem 0 .35rem;
  text-align:center;
  color: var(--muted);
  font-weight:700;
  letter-spacing: .2px;
  font-size: 1rem;
}

.quiz-question__text{
  margin: 0 0 .85rem;
  text-align:center;
  color: var(--headline);
  font-weight:700;
  letter-spacing:.1px;
  line-height: 1.35;
}

.quiz-form-wrap{
  background:#fff;
  border:1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 1rem;
}

.quiz-answers{
  display:flex;
  flex-direction:column;
  gap: .7rem;
}

.answer-option{
  position: relative;
  display: grid;
  place-items: center start;
  min-height: 3.5rem;

  padding: 1rem 1.1rem;
  border-radius: 16px;
  border:1px solid var(--border);
  background: var(--card-bg);
  cursor:pointer;

  transition: transform .12s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
  color: var(--text);
  font-weight: 600;
  line-height: 1.5;
}

.answer-option span{
  width: 100%;
  display: block;
}

.answer-option span *{
  margin: 0;
  padding: 0;
  line-height: 1.5;
}

.answer-option::before,
.answer-option::after{
  content: none !important;
}

.quiz-answer-input{
  position:absolute;
  opacity:0;
  pointer-events:none;
  width: 0;
  height: 0;
  margin: 0;
  padding: 0;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.answer-option:hover{
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(48,72,98,.14);
  border-color: rgba(48,72,98,.20);
  background: #fff;
}

.answer-option input[type="radio"]{
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
  margin: 0;
  padding: 0;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.answer-option:has(input:checked){
  background: rgba(59, 130, 246, 0.15) !important;
  border-color: rgba(59, 130, 246, 0.6) !important;
  box-shadow: none !important;
  transform: translateY(0);
}

.answer-option:has(input:checked) span{
  color: var(--headline);
}

.answer-option:has(input:focus-visible){
  outline: none;
  box-shadow: 0 0 0 4px rgba(48,72,98,.14), 0 12px 28px rgba(48,72,98,.18);
  border-color: rgba(48,72,98,.45);
}

.quiz-answer-input:checked + span{
  color: var(--headline);
}

.quiz-submit{
  margin-top: .95rem;
  display:flex;
  justify-content:center;
}

.quiz-results-container{
  padding: 1rem 0 1.25rem;
}

.results-box{
  width: min(860px, 92%);
  margin: 0 auto;
  background:#fff;
  border:1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 1.1rem 1.1rem 1.2rem;
  text-align:center;
  overflow: hidden;
}

.results-box img{
  max-width: 100%;
  height: auto;
  display: block;
}

.quiz-completed-title{
  margin: .15rem 0 .75rem;
  color: var(--headline);
  font-weight:700;
  letter-spacing:.2px;
}

.quiz-score{
  margin: 0;
  color: var(--text);
  font-weight:700;
  letter-spacing:.1px;
  font-family: 'Roboto Mono', 'Courier New', Courier, monospace;
}

.score-label{ color: var(--muted); font-weight:700; }
.score-value{ color: var(--headline); font-family: 'Roboto Mono', 'Courier New', Courier, monospace; }

.user-stats-container{
  margin: 1rem 0 .75rem;
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .75rem;
}

@media (max-width: 520px){
  .user-stats-container{ grid-template-columns: 1fr; }
}

.stat-box{
  border:1px solid var(--border);
  border-radius: 16px;
  background: var(--card-bg);
  padding: .85rem .9rem;
  box-shadow: 0 10px 22px rgba(48,72,98,.10);
}

.stat-icon{ font-size: 1.25rem; }
.stat-label{
  margin: .35rem 0 .1rem;
  color: var(--muted);
  font-weight:700;
}
.stat-value{
  margin: 0;
  color: var(--headline);
  font-weight:700;
  font-size: 1.25rem;
  font-family: 'Roboto Mono', 'Courier New', Courier, monospace;
}

.image-container{
  margin: .6rem 0 .85rem;
}

.question-image{
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: block;
  background: #e9eef4;
}

.question-block{
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.content-container{
  display: grid;
  grid-template-columns: 1fr;
  gap: .9rem;
}

.question-number{
  color: var(--muted);
  font-weight:700;
  letter-spacing: .2px;
  margin-bottom: .2rem;
  font-family: 'Roboto Mono', 'Courier New', Courier, monospace;
}

.question-result{
  font-size: 1.2rem;
  font-weight:700;
  margin-bottom: .35rem;
}

.question-number,
.question-result{
  text-align: center;
}

.question-result{
  display: flex;
  justify-content: center;
  align-items: center;
}

.question-text{
  color: var(--headline);
  font-weight:700;
  line-height: 1.35;
  margin: .35rem 0 .7rem;
}

.answer-list{
  list-style: none;
  padding: 0;
  margin: .85rem 0 0;
  text-align:left;
}

.question-block .answer-list{
  margin: .45rem 0 0;
  display:flex;
  flex-direction:column;
  gap: .5rem;
}

.result-answer-option{
  position: relative;
  padding: .75rem .85rem .75rem 2.35rem;
  border-radius: 14px;
  border:1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  font-weight: 600;
  line-height: 1.4;
}

.result-answer-option.correct-answer{
  background: #ecfdf5;
  border-color: rgba(16,185,129,.55);
  color: #065f46;
}

.result-answer-option.incorrect-answer{
  background: #fef2f2;
  border-color: rgba(239,68,68,.55);
  color: #7f1d1d;
}

.explanation{
  margin: .65rem 0 0;
  padding: .75rem .85rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  line-height: 1.6;
  font-weight: 700;
}

.explanation a{
  color: var(--headline);
  font-weight:700;
  text-decoration: none;
  border-bottom: 1px solid rgba(48,72,98,.25);
}

.explanation a:hover{
  color: var(--hover);
  border-bottom-color: rgba(222,70,64,.35);
}

.return-btn{
  margin-top: 1rem;
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  color: var(--headline);
  text-decoration:none;
  font-weight:700;
  padding: .7rem .9rem;
  border-radius: 14px;
  border:1px solid var(--border);
  background: var(--card-bg);
}

.return-btn:hover{
  color: var(--hover);
  border-color: rgba(222,70,64,.35);
}

.quiz-selectors{
  padding: 1.25rem 0 1.5rem;
}

.quiz-selectors .filters-form-2{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
  align-items: flex-end;
}

.quiz-selectors .filters-field{
  display:flex;
  flex-direction:column;
  gap: .35rem;
}

.quiz-selectors .filters-label{
  display: block;
  font-weight:700;
  color: var(--muted);
  margin-bottom: 0;
  letter-spacing: .2px;
  font-size: .95rem;
}

.quiz-selectors .filters-select{
  width: 100%;
  padding: .7rem .85rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--headline);
  font-weight: 700;
  outline: none;
  cursor: pointer;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.quiz-selectors .filters-select:hover{
  border-color: var(--headline);
}

.quiz-selectors .filters-select:focus{
  border-color: var(--headline);
  box-shadow: 0 0 0 3px rgba(48, 72, 98, .1);
}

@media (max-width: 520px){
  .quiz-selectors .filters-form-2{ grid-template-columns: 1fr; }

  .results-box{
    width: 100%;
    padding: .85rem .75rem;
  }

  .image-container{
    margin: .5rem 0 .65rem;
  }
}