.material-hero{
  padding:70px 0 40px;
  text-align:center;
}
.material-hero .wrap{max-width:720px;}
.material-hero h1{font-size:clamp(30px,4vw,44px);}

.material-toolbar{
  position:sticky;top:73px;z-index:40;
  background:var(--cream);
  border-bottom:1px solid var(--line);
  padding:16px 0;
}

.search-row{
  margin-top:14px;position:relative;display:flex;align-items:center;
}
.search-row .material-icons-outlined{
  position:absolute;left:14px;font-size:19px;color:var(--ink-soft);pointer-events:none;
}
.search-row input{
  width:100%;padding:11px 16px 11px 44px;border-radius:7px;
  border:1px solid var(--line);background:#fff;
  font-family:'Jost',sans-serif;font-size:14px;color:var(--ink);
  transition:border-color .2s;
}
.search-row input:focus{outline:none;border-color:var(--terracotta);}

.active-filter-chip{
  display:flex;align-items:center;gap:8px;margin-top:12px;
  background:var(--cream-2);border:1px solid var(--line);border-radius:7px;
  padding:9px 14px;font-size:13px;color:var(--ink-soft);width:fit-content;
}
.active-filter-chip .material-icons-outlined{font-size:17px;color:var(--terracotta-dark);}
.active-filter-chip strong{color:var(--ink);font-weight:600;}
.active-filter-chip button{
  display:inline-flex;align-items:center;gap:3px;margin-left:6px;
  border:none;background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:4px 10px;font-size:12px;font-family:'Jost',sans-serif;color:var(--ink-soft);
  cursor:pointer;transition:border-color .15s,color .15s;
}
.active-filter-chip button:hover{border-color:var(--terracotta);color:var(--terracotta-dark);}
.active-filter-chip button .material-icons-outlined{font-size:14px;color:inherit;}

.pagination{
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:30px 0 60px;
}
.page-btn{
  min-width:38px;height:38px;padding:0 10px;border-radius:7px;
  border:1px solid var(--line);background:#fff;color:var(--ink-soft);
  font-family:'Jost',sans-serif;font-size:14px;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;gap:4px;
  transition:all .2s;
}
.page-btn:hover:not(:disabled){border-color:var(--terracotta);color:var(--terracotta-dark);}
.page-btn:disabled{opacity:0.4;cursor:default;}
.page-btn.active{background:var(--ink);border-color:var(--ink);color:#fff;}
.page-btn .material-icons-outlined{font-size:18px;}
.empty-state{
  text-align:center;padding:50px 20px;color:var(--ink-soft);font-size:15px;
}

.material-section{padding:56px 0;scroll-margin-top:140px;}
.material-section-head{
  display:flex;align-items:center;gap:18px;
  margin-bottom:30px;
}
.material-icon-badge{
  width:54px;height:54px;border-radius:16px;
  background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.material-icon-badge .material-icons-outlined{font-size:26px;color:var(--terracotta);}
.material-section-head h2{margin-bottom:2px;font-size:26px;}
.sublabel{margin:0;font-size:14px;color:var(--ink-soft);}

.tag-subject, .tag-format{
  font-size:11px;letter-spacing:0.04em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;font-weight:500;
}
.tag-subject{background:var(--sage-light);color:var(--sage);}
.tag-format{background:var(--cream-2);color:var(--terracotta-dark);}
/* table view */
.table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  overflow:hidden;overflow-x:auto;
}
.data-table{width:100%;border-collapse:collapse;min-width:480px;}
.data-table thead th{
  text-align:left;font-family:'Jost',sans-serif;font-weight:500;font-size:13px;
  letter-spacing:0.04em;text-transform:uppercase;color:var(--ink-soft);
  padding:16px 20px;border-bottom:1px solid var(--line);background:var(--cream-2);
  cursor:pointer;user-select:none;white-space:nowrap;
}
.data-table thead th:hover{color:var(--terracotta-dark);}
.data-table thead th.sorted{color:var(--terracotta-dark);}
.sort-arrow{display:inline-block;width:12px;font-size:12px;}
.data-table tbody td{
  padding:16px 20px;border-bottom:1px solid var(--line);font-size:14px;color:var(--ink);
  vertical-align:middle;
}
.data-table tbody tr:last-child td{border-bottom:none;}
.data-table tbody tr:hover{background:var(--cream);}
.table-title{font-weight:500;min-width:220px;}
.table-title a{color:var(--ink);transition:color .15s;}
.table-title a:hover{color:var(--terracotta-dark);}

/* material detail page */
.detail-hero{text-align:left;padding-top:40px;}
.detail-hero .wrap{max-width:760px;}
.back-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;color:var(--ink-soft);margin-bottom:28px;
  transition:color .2s;
}
.back-link .material-icons-outlined{font-size:18px;}
.back-link:hover{color:var(--terracotta-dark);}
.detail-head{display:flex;align-items:flex-start;gap:20px;margin-bottom:22px;}
.detail-head h1{font-size:clamp(26px,3.4vw,38px);margin-top:10px;}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;}
.tag-age{
  font-size:11px;letter-spacing:0.04em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;font-weight:500;
  background:var(--cream-2);color:var(--ink-soft);
}
.detail-description{font-size:17px;max-width:60ch;margin-bottom:34px;}

.detail-hook{
  font-family:'Fraunces',serif;font-size:21px;line-height:1.5;
  max-width:62ch;margin-bottom:40px;color:var(--ink);
}

.lesson-section{max-width:62ch;margin-bottom:38px;}
.lesson-heading{font-size:22px;margin-bottom:12px;}
.lesson-body{font-size:16px;margin-bottom:20px;}

.tip-box{
  display:flex;gap:16px;align-items:flex-start;max-width:62ch;
  background:#fdf6ec;border:1px solid #f0dfc0;border-radius:14px;
  padding:22px;margin-bottom:28px;
}
.tip-box .material-icons-outlined{font-size:24px;color:var(--mode-orange);flex:0 0 auto;margin-top:2px;}
.tip-box h3{font-size:15px;margin-bottom:4px;}
.tip-box p{margin:0;font-size:14px;color:var(--ink-soft);}

.key-concept{
  margin:0 0 0;padding:22px 26px;max-width:62ch;
  background:var(--cream-2);border-left:4px solid var(--terracotta);border-radius:0 10px 10px 0;
  position:relative;
}
.key-concept .material-icons-outlined{
  font-size:22px;color:var(--terracotta);opacity:0.6;margin-bottom:6px;display:block;
}
.key-concept p{
  margin:0;font-family:'Fraunces',serif;font-size:19px;font-style:italic;
  color:var(--ink);line-height:1.5;
}

.image-placeholder{
  max-width:62ch;margin-bottom:20px;padding:40px 24px;
  border:2px dashed var(--line);border-radius:14px;background:#fff;
  text-align:center;color:var(--ink-soft);
}
.image-placeholder .material-icons-outlined{font-size:34px;color:var(--line);margin-bottom:10px;}
.image-placeholder p{margin:0 0 10px;font-size:15px;color:var(--ink-soft);}
.image-placeholder-tag{
  display:inline-block;font-size:11px;letter-spacing:0.04em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;background:var(--cream-2);color:var(--ink-soft);
}

.lesson-image{
  max-width:62ch;margin:0 0 20px;padding:0;
}
.lesson-image img{
  display:block;width:100%;height:auto;border-radius:14px;background:#fff;
  border:1px solid var(--line);
}
.lesson-image figcaption{
  margin-top:8px;font-size:13px;color:var(--ink-soft);text-align:center;
}
.detail-panel{
  display:flex;gap:16px;align-items:flex-start;
  border-radius:14px;padding:22px;margin-bottom:24px;
}
.detail-panel .material-icons-outlined{font-size:26px;flex:0 0 auto;margin-top:2px;}
.detail-panel h3{font-size:16px;margin-bottom:4px;}
.detail-panel p{margin:0;font-size:14px;}
.detail-soon{background:var(--cream-2);}
.detail-soon .material-icons-outlined{color:var(--ink-soft);}

/* interactive exercise block */
.exercise-block{
  max-width:62ch;background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:28px;margin-bottom:24px;
}
.exercise-head{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.exercise-head .material-icons-outlined{color:var(--terracotta);font-size:24px;}
.exercise-head h3{margin:0;font-size:18px;flex:1 1 auto;}
.quiz-progress{font-size:13px;color:var(--ink-soft);font-weight:500;}
.quiz-track{height:6px;border-radius:999px;background:var(--cream-2);overflow:hidden;margin-bottom:22px;}
.quiz-track-fill{height:100%;background:var(--terracotta);border-radius:999px;transition:width .3s ease;}

.quiz-results{text-align:center;padding:10px 0;}
.quiz-stars{display:flex;justify-content:center;gap:6px;margin-bottom:14px;}
.quiz-stars .material-icons-outlined{font-size:34px;color:var(--line);}
.quiz-stars .material-icons-outlined.filled{color:var(--mode-orange);}
.quiz-score{font-family:'Fraunces',serif;font-size:24px;margin:0 0 6px;color:var(--ink);}
.quiz-message{font-size:15px;color:var(--ink-soft);margin:0 0 22px;}
.exercise-question{font-size:16px;font-weight:500;color:var(--ink);margin-bottom:18px;}
.exercise-options{display:flex;flex-direction:column;gap:10px;margin-bottom:20px;}
.exercise-option{
  display:flex;align-items:center;gap:12px;text-align:left;
  padding:13px 16px;border-radius:9px;border:2px solid var(--line);background:var(--cream);
  font-family:'Jost',sans-serif;font-size:15px;color:var(--ink);cursor:pointer;
  transition:all .15s;
}
.exercise-option:hover:not(.disabled){border-color:var(--terracotta);}
.exercise-option.selected{border-color:var(--terracotta);background:var(--cream-2);}
.exercise-option-letter{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--cream-2);display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:13px;color:var(--ink-soft);
}
.exercise-option.selected .exercise-option-letter{background:var(--terracotta);color:#fff;}
.exercise-option.disabled{cursor:default;}
.exercise-option.correct{border-color:var(--sage);background:var(--sage-light);}
.exercise-option.correct .exercise-option-letter{background:var(--sage);color:#fff;}
.exercise-option.incorrect{border-color:#c0564f;background:#fbe9e7;}
.exercise-option.incorrect .exercise-option-letter{background:#c0564f;color:#fff;}
.exercise-feedback{
  display:none;gap:14px;align-items:flex-start;margin-top:18px;
  padding:16px 18px;border-radius:10px;
}
.exercise-feedback.is-correct, .exercise-feedback.is-incorrect{display:flex;}
.exercise-feedback + .btn{margin-top:18px;}
.exercise-feedback.is-correct{background:var(--sage-light);}
.exercise-feedback.is-correct .material-icons-outlined{color:var(--sage);}
.exercise-feedback.is-incorrect{background:#fbe9e7;}
.exercise-feedback.is-incorrect .material-icons-outlined{color:#c0564f;}
.exercise-feedback .material-icons-outlined{font-size:22px;flex:0 0 auto;margin-top:2px;}
.exercise-feedback strong{display:block;margin-bottom:4px;font-size:14px;}
.exercise-feedback p{margin:0;font-size:14px;color:var(--ink-soft);}

/* responsivo */
@media (max-width:700px){
  .material-hero{padding:44px 0 28px;}
  .material-hero .section-lede{font-size:15px;}
  .material-toolbar{top:0;padding:12px 0;}
  .material-section{padding:32px 0;}
  .material-section-head{gap:12px;margin-bottom:18px;}
  .material-icon-badge{width:44px;height:44px;border-radius:12px;}
  .material-icon-badge .material-icons-outlined{font-size:21px;}
  .material-section-head h2{font-size:20px;}
  .data-table{min-width:0;}
  .data-table thead th, .data-table tbody td{padding:12px 14px;font-size:13px;}
  .table-title{min-width:140px;}
  .pagination{padding:20px 0 40px;flex-wrap:wrap;}
}

@media (max-width:480px){
  .search-row input{font-size:13px;}
}