/*
 * My Self_Learn Chemistry Database - isolated visual layer
 * Version: 1.5.0
 * This file is intentionally scoped to [data-msl-db] so Cocoon / Elementor /
 * theme CSS does not leak into the database UI.
 */

.msl-db[data-msl-db]{
  --msl-brand:#2ed2e8;
  --msl-brand-hover:#18bdd4;
  --msl-brand-dark:#0d8e9f;
  --msl-ink:#183d46;
  --msl-text:#536a70;
  --msl-muted:#8a9a9e;
  --msl-border:#dcebed;
  --msl-border-strong:#c6e2e6;
  --msl-bg:#f7fbfc;
  --msl-soft:#eefbfc;
  --msl-white:#fff;
  --msl-shadow:0 12px 32px rgba(24,61,70,.07);
  --msl-shadow-hover:0 18px 42px rgba(24,61,70,.11);
  isolation:isolate;
  width:100%;
  max-width:1180px;
  margin:24px auto 56px!important;
  padding:0!important;
  background:transparent!important;
  color:var(--msl-text)!important;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif!important;
  font-size:16px!important;
  font-weight:400!important;
  line-height:1.7!important;
  letter-spacing:0!important;
  text-align:left!important;
}

/* Theme isolation */
.msl-db[data-msl-db],
.msl-db[data-msl-db] *{box-sizing:border-box!important}
.msl-db[data-msl-db] :where(h1,h2,h3,h4,h5,h6,p,ul,ol,li,form,fieldset,label,table,thead,tbody,tr,th,td,details,summary){
  text-transform:none!important;
  text-decoration:none;
}
.msl-db[data-msl-db] :where(button,input,select,textarea){
  font-family:inherit!important;
  letter-spacing:0!important;
  text-transform:none!important;
}
.msl-db[data-msl-db] button{
  float:none!important;
  width:auto;
  margin:0!important;
  line-height:1.3!important;
  text-shadow:none!important;
  filter:none!important;
}
.msl-db[data-msl-db] a{box-shadow:none!important}
.msl-db[data-msl-db] select{-webkit-appearance:auto!important;appearance:auto!important}

/* Hero */
.msl-db[data-msl-db] .msl-db-hero{
  position:relative;
  overflow:hidden;
  padding:40px 44px!important;
  border:1px solid #cdeff3!important;
  border-radius:24px!important;
  background:linear-gradient(135deg,#effcff 0%,#fff 55%,#f4fdfe 100%)!important;
  box-shadow:var(--msl-shadow)!important;
}
.msl-db[data-msl-db] .msl-db-hero:after{
  content:"";
  position:absolute;
  right:-80px;
  bottom:-115px;
  width:300px;
  height:300px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(46,210,232,.13),rgba(46,210,232,0) 68%);
  pointer-events:none;
}
.msl-db[data-msl-db] .msl-db-eyebrow{
  color:var(--msl-brand-dark)!important;
  font-size:11px!important;
  font-weight:800!important;
  letter-spacing:.16em!important;
}
.msl-db[data-msl-db] .msl-db-hero h2{
  margin:8px 0 10px!important;
  padding:0!important;
  border:0!important;
  background:none!important;
  color:var(--msl-ink)!important;
  font-size:34px!important;
  font-weight:800!important;
  line-height:1.38!important;
  letter-spacing:-.02em!important;
}
.msl-db[data-msl-db] .msl-db-hero p{
  margin:0!important;
  padding:0!important;
  color:#667a80!important;
  font-size:14px!important;
}
.msl-db[data-msl-db] .msl-db-hero-guide{
  position:relative;
  z-index:1;
  padding:18px 16px!important;
  border:1px solid #d9eef1!important;
  border-radius:16px!important;
  background:rgba(255,255,255,.92)!important;
  box-shadow:0 8px 24px rgba(24,61,70,.05)!important;
}
.msl-db[data-msl-db] .msl-db-hero-guide b{
  width:36px!important;
  height:36px!important;
  background:var(--msl-brand)!important;
  box-shadow:0 7px 16px rgba(46,210,232,.24)!important;
}

/* Section headers */
.msl-db[data-msl-db] .msl-db-area-section,
.msl-db[data-msl-db] .msl-db-search-panel,
.msl-db[data-msl-db] .msl-db-result-section{margin-top:30px!important}
.msl-db[data-msl-db] .msl-db-section-head,
.msl-db[data-msl-db] .msl-db-result-head{margin:0 0 14px!important}
.msl-db[data-msl-db] .msl-db-step-number{
  min-width:42px!important;
  height:28px!important;
  border:1px solid #cdeff3!important;
  border-radius:999px!important;
  background:#edfbfd!important;
  color:var(--msl-brand-dark)!important;
}
.msl-db[data-msl-db] .msl-db-section-head h3,
.msl-db[data-msl-db] .msl-db-result-head h3{
  margin:0!important;
  padding:0!important;
  border:0!important;
  background:none!important;
  color:var(--msl-ink)!important;
  font-size:20px!important;
  font-weight:800!important;
  line-height:1.4!important;
}

/* Unified button baseline */
.msl-db[data-msl-db] :is(.msl-db-all-link,.msl-db-primary,.msl-db-reset,.msl-db-link,.msl-db-pagination button,.msl-db-empty button){
  border-radius:12px!important;
  font-weight:800!important;
  text-decoration:none!important;
  cursor:pointer!important;
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease,background-color .16s ease,color .16s ease!important;
}
.msl-db[data-msl-db] :is(.msl-db-all-link,.msl-db-primary,.msl-db-reset,.msl-db-link,.msl-db-pagination button,.msl-db-empty button):focus-visible,
.msl-db[data-msl-db] .msl-db-area-card:focus-visible{
  outline:3px solid rgba(46,210,232,.24)!important;
  outline-offset:2px!important;
}

/* Category buttons */
.msl-db[data-msl-db] .msl-db-area-grid{
  grid-template-columns:repeat(5,minmax(0,1fr))!important;
  gap:14px!important;
}
.msl-db[data-msl-db] .msl-db-area-card{
  position:relative!important;
  min-height:178px!important;
  padding:17px!important;
  border:1px solid var(--msl-border)!important;
  border-radius:18px!important;
  background:var(--msl-white)!important;
  color:var(--msl-text)!important;
  box-shadow:0 5px 18px rgba(24,61,70,.045)!important;
  transform:none;
}
.msl-db[data-msl-db] .msl-db-area-card:before{
  top:0!important;
  right:0!important;
  bottom:auto!important;
  left:0!important;
  width:100%!important;
  height:4px!important;
  border-radius:18px 18px 0 0!important;
  background:#e9f1f2!important;
}
.msl-db[data-msl-db] .msl-db-area-card:hover{
  transform:translateY(-3px)!important;
  border-color:#afe6ed!important;
  box-shadow:var(--msl-shadow-hover)!important;
}
.msl-db[data-msl-db] .msl-db-area-card.is-active{
  border-color:var(--msl-brand)!important;
  background:linear-gradient(180deg,#f0fdff 0%,#fff 74%)!important;
  box-shadow:0 0 0 2px rgba(46,210,232,.1),var(--msl-shadow)!important;
}
.msl-db[data-msl-db] .msl-db-area-card.is-active:before{background:var(--msl-brand)!important}
.msl-db[data-msl-db] .msl-db-area-symbol{
  width:44px!important;
  height:44px!important;
  border-radius:13px!important;
  box-shadow:none!important;
}
.msl-db[data-msl-db] .msl-db-area-copy strong{
  color:var(--msl-ink)!important;
  font-size:15px!important;
  font-weight:800!important;
}
.msl-db[data-msl-db] .msl-db-area-copy small{
  color:#819196!important;
  font-size:10.5px!important;
}
.msl-db[data-msl-db] .msl-db-area-count{color:var(--msl-brand-dark)!important}
.msl-db[data-msl-db] .msl-db-area-select{
  min-height:32px!important;
  padding:0 11px!important;
  border-color:#d9e7e9!important;
  background:#f8fbfc!important;
  color:#657b80!important;
}
.msl-db[data-msl-db] .msl-db-area-card.is-active .msl-db-area-select{
  border-color:var(--msl-brand)!important;
  background:var(--msl-brand)!important;
  color:#fff!important;
  box-shadow:0 5px 14px rgba(46,210,232,.22)!important;
}
.msl-db[data-msl-db] .msl-db-all-link{
  min-height:42px!important;
  padding:0 15px!important;
  border:1px solid var(--msl-border-strong)!important;
  background:#fff!important;
  color:#60777d!important;
}
.msl-db[data-msl-db] .msl-db-all-link:hover{
  transform:translateY(-1px)!important;
  border-color:#9ce3ec!important;
  background:#f4fdfe!important;
  color:var(--msl-brand-dark)!important;
}

/* Search panel */
.msl-db[data-msl-db] .msl-db-search-panel{
  padding:26px!important;
  border:1px solid var(--msl-border)!important;
  border-radius:22px!important;
  background:#fff!important;
  box-shadow:var(--msl-shadow)!important;
}
.msl-db[data-msl-db] .msl-db-field{
  padding:16px!important;
  border:1px solid #dbe9eb!important;
  border-radius:15px!important;
  background:#fbfeff!important;
}
.msl-db[data-msl-db] .msl-db-field:hover{border-color:#c7e7eb!important}
.msl-db[data-msl-db] .msl-db-field:focus-within{
  border-color:#a8e4eb!important;
  box-shadow:0 0 0 3px rgba(46,210,232,.08)!important;
}
.msl-db[data-msl-db] .msl-db-field-step{
  width:30px!important;
  height:30px!important;
  background:#e9fafc!important;
  color:var(--msl-brand-dark)!important;
}
.msl-db[data-msl-db] :is(.msl-db-field select,.msl-db-advanced select,.msl-db-keyword input){
  border:1px solid #cfdee1!important;
  background-color:#fff!important;
  color:#3d565c!important;
  box-shadow:none!important;
}
.msl-db[data-msl-db] :is(.msl-db-field select,.msl-db-advanced select){
  height:48px!important;
  border-radius:11px!important;
}
.msl-db[data-msl-db] .msl-db-keyword input{
  height:54px!important;
  border-radius:13px!important;
}
.msl-db[data-msl-db] :is(.msl-db-field select,.msl-db-advanced select,.msl-db-keyword input):focus{
  outline:none!important;
  border-color:var(--msl-brand)!important;
  box-shadow:0 0 0 3px rgba(46,210,232,.12)!important;
}
.msl-db[data-msl-db] .msl-db-primary{
  min-width:210px!important;
  min-height:54px!important;
  padding:0 22px!important;
  border:1px solid var(--msl-brand)!important;
  background:var(--msl-brand)!important;
  color:#fff!important;
  box-shadow:0 9px 20px rgba(46,210,232,.24)!important;
}
.msl-db[data-msl-db] .msl-db-primary:hover{
  transform:translateY(-2px)!important;
  border-color:var(--msl-brand-hover)!important;
  background:var(--msl-brand-hover)!important;
  box-shadow:0 13px 26px rgba(46,210,232,.28)!important;
}
.msl-db[data-msl-db] .msl-db-primary:active{transform:translateY(0)!important}
.msl-db[data-msl-db] .msl-db-advanced{
  border:1px solid #dfeaec!important;
  border-radius:14px!important;
  background:#fafefe!important;
}
.msl-db[data-msl-db] .msl-db-advanced summary{
  margin:0!important;
  padding:12px 14px!important;
  border:0!important;
  background:transparent!important;
}
.msl-db[data-msl-db] .msl-db-advanced summary:hover{background:#f2fbfc!important}
.msl-db[data-msl-db] .msl-db-detail-toggle{border-color:#d7e6e8!important}
.msl-db[data-msl-db] .msl-db-filter-chip{
  min-height:29px!important;
  border-color:#c7ebf0!important;
  background:#eafafb!important;
  color:var(--msl-brand-dark)!important;
}
.msl-db[data-msl-db] .msl-db-reset{
  min-height:40px!important;
  padding:0 13px!important;
  border:1px solid #dae6e8!important;
  background:#fff!important;
  color:#6b8085!important;
}
.msl-db[data-msl-db] .msl-db-reset:hover{
  transform:translateY(-1px)!important;
  border-color:#bcdde1!important;
  background:#f6fbfc!important;
  color:#4e686e!important;
}

/* Results */
.msl-db[data-msl-db] .msl-db-result-head p{margin:0!important}
.msl-db[data-msl-db] .msl-db-table-wrap{
  border:1px solid var(--msl-border)!important;
  border-radius:18px!important;
  background:#fff!important;
  box-shadow:var(--msl-shadow)!important;
}
.msl-db[data-msl-db] .msl-db-table{
  width:100%!important;
  margin:0!important;
  border:0!important;
  border-collapse:collapse!important;
  background:#fff!important;
  color:var(--msl-text)!important;
  font-size:13px!important;
}
.msl-db[data-msl-db] .msl-db-table th{
  padding:13px 14px!important;
  border:0!important;
  border-bottom:1px solid var(--msl-border)!important;
  background:#f6fbfc!important;
  color:#536a70!important;
  font-size:11px!important;
  font-weight:800!important;
}
.msl-db[data-msl-db] .msl-db-table td{
  padding:14px!important;
  border:0!important;
  border-bottom:1px solid #edf3f4!important;
  background:#fff!important;
  color:var(--msl-text)!important;
}
.msl-db[data-msl-db] .msl-db-table tr:hover td{background:#fbfeff!important}
.msl-db[data-msl-db] .msl-db-link{
  min-height:40px!important;
  padding:8px 13px!important;
  border:1px solid #cde1e5!important;
  background:#fff!important;
  color:#526d73!important;
}
.msl-db[data-msl-db] .msl-db-link.primary{
  border-color:var(--msl-brand)!important;
  background:var(--msl-brand)!important;
  color:#fff!important;
  box-shadow:0 6px 15px rgba(46,210,232,.19)!important;
}
.msl-db[data-msl-db] .msl-db-link:hover{
  transform:translateY(-1px)!important;
  border-color:#a7dde4!important;
  box-shadow:0 7px 16px rgba(24,61,70,.07)!important;
}
.msl-db[data-msl-db] .msl-db-link.primary:hover{
  border-color:var(--msl-brand-hover)!important;
  background:var(--msl-brand-hover)!important;
}
.msl-db[data-msl-db] .msl-db-card{
  border:1px solid var(--msl-border)!important;
  border-radius:17px!important;
  background:#fff!important;
  box-shadow:0 8px 24px rgba(24,61,70,.055)!important;
}
.msl-db[data-msl-db] .msl-db-card h4{
  margin:12px 0 4px!important;
  padding:0!important;
  border:0!important;
  background:none!important;
  color:#304a50!important;
  font-size:16px!important;
  font-weight:800!important;
  line-height:1.45!important;
}
.msl-db[data-msl-db] .msl-db-card-meta span{background:#f5fafb!important}
.msl-db[data-msl-db] .msl-db-pagination button{
  min-width:40px!important;
  height:40px!important;
  border:1px solid #d5e5e7!important;
  background:#fff!important;
  color:#5d757b!important;
}
.msl-db[data-msl-db] .msl-db-pagination button:hover{
  transform:translateY(-1px)!important;
  border-color:#aee4eb!important;
  background:#f4fdfe!important;
  color:var(--msl-brand-dark)!important;
}
.msl-db[data-msl-db] .msl-db-pagination button.is-current{
  border-color:var(--msl-brand)!important;
  background:var(--msl-brand)!important;
  color:#fff!important;
}

/* Responsive */
@media(max-width:1060px){
  .msl-db[data-msl-db] .msl-db-area-grid{grid-template-columns:repeat(3,minmax(0,1fr))!important}
}
@media(max-width:820px){
  .msl-db[data-msl-db]{margin:16px auto 42px!important}
  .msl-db[data-msl-db] .msl-db-hero{padding:30px 24px!important}
  .msl-db[data-msl-db] .msl-db-area-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}
  .msl-db[data-msl-db] .msl-db-area-card{min-height:162px!important}
  .msl-db[data-msl-db] .msl-db-area-card:last-child{grid-column:1/-1!important;min-height:145px!important}
}
@media(max-width:600px){
  .msl-db[data-msl-db]{font-size:15px!important}
  .msl-db[data-msl-db] .msl-db-hero{padding:24px 18px!important;border-radius:18px!important}
  .msl-db[data-msl-db] .msl-db-hero h2{font-size:23px!important}
  .msl-db[data-msl-db] .msl-db-area-grid{gap:9px!important}
  .msl-db[data-msl-db] .msl-db-area-card{min-height:154px!important;padding:13px!important;border-radius:15px!important}
  .msl-db[data-msl-db] .msl-db-area-card:before{border-radius:15px 15px 0 0!important}
  .msl-db[data-msl-db] .msl-db-area-copy strong{font-size:14px!important}
  .msl-db[data-msl-db] .msl-db-search-panel{padding:18px!important;border-radius:18px!important}
  .msl-db[data-msl-db] .msl-db-primary{width:100%!important;min-width:0!important}
  .msl-db[data-msl-db] .msl-db-reset{width:100%!important}
  .msl-db[data-msl-db] .msl-db-card .msl-db-link{width:100%!important;min-height:44px!important}
}

/* =========================================================
 * My Self_Learn brand color policy - v1.5.0
 * White / light surfaces: text #5A5A5A
 * #2ed2e8 surfaces: text / numbers / icons #FFFFFF
 * ======================================================= */
.msl-db[data-msl-db]{
  --msl-brand:#2ed2e8;
  --msl-ink:#5A5A5A;
  --msl-text:#5A5A5A;
  --msl-muted:#5A5A5A;
  --msl-brand-dark:#5A5A5A;
  color:#5A5A5A!important;
}

/* White and pale surfaces */
.msl-db[data-msl-db] :is(
  .msl-db-hero,
  .msl-db-hero-guide,
  .msl-db-area-section,
  .msl-db-area-card,
  .msl-db-search-panel,
  .msl-db-field,
  .msl-db-advanced,
  .msl-db-result-section,
  .msl-db-table-wrap,
  .msl-db-table,
  .msl-db-table th,
  .msl-db-table td,
  .msl-db-card,
  .msl-db-card-meta span,
  .msl-db-filter-chip,
  .msl-db-all-link,
  .msl-db-reset,
  .msl-db-link:not(.primary),
  .msl-db-pagination button:not(.is-current),
  input,
  select,
  textarea
){
  color:#5A5A5A!important;
}

.msl-db[data-msl-db] :is(
  .msl-db-eyebrow,
  .msl-db-hero h2,
  .msl-db-hero p,
  .msl-db-hero-guide span,
  .msl-db-hero-guide i,
  .msl-db-step-number,
  .msl-db-section-head h3,
  .msl-db-result-head h3,
  .msl-db-area-copy strong,
  .msl-db-area-copy small,
  .msl-db-area-count,
  .msl-db-area-select,
  .msl-db-field-step,
  .msl-db-detail-toggle,
  .msl-db-filter-chip,
  .msl-db-table th,
  .msl-db-table td,
  .msl-db-card h4,
  .msl-db-card-meta span,
  .msl-db-all-link,
  .msl-db-reset,
  .msl-db-link:not(.primary),
  .msl-db-pagination button:not(.is-current)
){
  color:#5A5A5A!important;
}

/* Category symbols stay on pale surfaces and therefore use #5A5A5A */
.msl-db[data-msl-db] .msl-db-area-symbol,
.msl-db[data-msl-db] .msl-db-area-card[data-area] .msl-db-area-symbol{
  color:#5A5A5A!important;
}

/* Brand surfaces: every foreground element is white */
.msl-db[data-msl-db] :is(
  .msl-db-primary,
  .msl-db-link.primary,
  .msl-db-pagination button.is-current,
  .msl-db-hero-guide b,
  .msl-db-area-card.is-active .msl-db-area-select,
  .msl-db-area-card.is-active .msl-db-area-symbol
){
  border-color:#2ed2e8!important;
  background:#2ed2e8!important;
  color:#FFFFFF!important;
}

.msl-db[data-msl-db] :is(
  .msl-db-primary,
  .msl-db-link.primary,
  .msl-db-pagination button.is-current,
  .msl-db-hero-guide b,
  .msl-db-area-card.is-active .msl-db-area-select,
  .msl-db-area-card.is-active .msl-db-area-symbol
) :is(span,strong,small,b,i,svg,path,.dashicons){
  color:#FFFFFF!important;
  fill:currentColor!important;
}

/* Keep hover state inside the same brand palette */
.msl-db[data-msl-db] :is(.msl-db-primary,.msl-db-link.primary):hover{
  background:#2ed2e8!important;
  border-color:#2ed2e8!important;
  color:#FFFFFF!important;
}

/* =========================================================
 * v1.6.0 Unit learning: overview -> key points -> exercises
 * ========================================================= */
.msl-db[data-msl-db] .msl-db-learning-section{
  margin:28px 0;
  padding:0;
  border:1px solid rgba(46,210,232,.24);
  border-radius:24px;
  background:#f7fdfe;
  box-shadow:0 12px 32px rgba(30,80,90,.06);
  overflow:hidden;
}
.msl-db[data-msl-db] .msl-db-learning-section[hidden]{display:none!important;}
.msl-db[data-msl-db] .msl-db-learning-head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 24px;border-bottom:1px solid rgba(46,210,232,.18);background:#fff;
}
.msl-db[data-msl-db] .msl-db-learning-head>div{display:flex;align-items:center;gap:12px;}
.msl-db[data-msl-db] .msl-db-learning-head small{display:block;margin:0 0 3px;font-size:11px;font-weight:800;letter-spacing:.12em;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-learning-head h3{margin:0;font-size:22px;line-height:1.35;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-learning-badge{
  display:inline-flex;align-items:center;gap:7px;padding:9px 13px;border-radius:999px;
  background:#2ed2e8!important;color:#fff!important;font-size:12px;font-weight:800;white-space:nowrap;
}
.msl-db[data-msl-db] .msl-db-learning-badge .dashicons{color:#fff!important;}
.msl-db[data-msl-db] .msl-db-learning-content{padding:24px;}
.msl-db[data-msl-db] .msl-db-learning-overview,
.msl-db[data-msl-db] .msl-db-learning-points{
  padding:20px 22px;margin:0 0 16px;border:1px solid #e5f4f6;border-radius:18px;background:#fff;color:#5A5A5A!important;
}
.msl-db[data-msl-db] .msl-db-learning-label{
  display:flex;align-items:center;gap:8px;margin:0 0 12px;font-size:15px;font-weight:800;color:#5A5A5A!important;
}
.msl-db[data-msl-db] .msl-db-learning-label .dashicons{color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-learning-body{font-size:15px;line-height:1.95;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-learning-points ul{margin:0;padding:0;list-style:none;display:grid;gap:9px;}
.msl-db[data-msl-db] .msl-db-learning-points li{position:relative;margin:0;padding:11px 12px 11px 38px;border-radius:12px;background:#f3fbfc;color:#5A5A5A!important;line-height:1.65;}
.msl-db[data-msl-db] .msl-db-learning-points li:before{content:'✓';position:absolute;left:12px;top:10px;width:18px;height:18px;border-radius:50%;display:grid;place-items:center;background:#2ed2e8;color:#fff;font-size:11px;font-weight:900;}
.msl-db[data-msl-db] .msl-db-exercises{margin-top:22px;}
.msl-db[data-msl-db] .msl-db-exercise-heading{display:flex;align-items:end;justify-content:space-between;gap:12px;margin:0 0 12px;padding:0 3px;}
.msl-db[data-msl-db] .msl-db-exercise-heading span{font-size:10px;font-weight:900;letter-spacing:.16em;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-exercise-heading h4{margin:2px 0 0;font-size:20px;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-exercise-heading small{font-weight:800;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-exercise-card{margin:0 0 14px;padding:20px;border:1px solid #e2eff1;border-radius:18px;background:#fff;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-exercise-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;}
.msl-db[data-msl-db] .msl-db-exercise-no{display:inline-flex;padding:6px 10px;border-radius:999px;background:#eefbfc;color:#5A5A5A!important;font-size:12px;font-weight:900;}
.msl-db[data-msl-db] .msl-db-exercise-card h5{margin:0 0 12px;font-size:17px;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-exercise-question{padding:16px;border-radius:14px;background:#fafcfc;color:#5A5A5A!important;line-height:1.9;}
.msl-db[data-msl-db] .msl-db-answer-toggle{
  width:100%;min-height:48px;margin-top:14px;padding:10px 14px;border:1px solid #2ed2e8!important;border-radius:13px;background:#2ed2e8!important;color:#fff!important;
  display:flex;align-items:center;justify-content:center;gap:8px;font-weight:900;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease;
}
.msl-db[data-msl-db] .msl-db-answer-toggle:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(46,210,232,.20);}
.msl-db[data-msl-db] .msl-db-answer-toggle :is(.dashicons,.label,.arrow){color:#fff!important;}
.msl-db[data-msl-db] .msl-db-answer-toggle .arrow{margin-left:auto;font-size:18px;font-weight:900;}
.msl-db[data-msl-db] .msl-db-answer-panel{margin-top:12px;border:1px solid #dff0f2;border-radius:14px;overflow:hidden;background:#fff;}
.msl-db[data-msl-db] .msl-db-answer-panel[hidden]{display:none!important;}
.msl-db[data-msl-db] .msl-db-answer-block,
.msl-db[data-msl-db] .msl-db-explanation-block{padding:17px 18px;color:#5A5A5A!important;line-height:1.9;}
.msl-db[data-msl-db] .msl-db-answer-block{background:#f2fcfd;}
.msl-db[data-msl-db] .msl-db-explanation-block{border-top:1px solid #e4f0f2;background:#fff;}
.msl-db[data-msl-db] .msl-db-answer-block>strong,
.msl-db[data-msl-db] .msl-db-explanation-block>strong{display:block;margin-bottom:7px;color:#5A5A5A!important;font-size:13px;}
.msl-db[data-msl-db] .msl-db-learning-loading,
.msl-db[data-msl-db] .msl-db-learning-empty{padding:28px;text-align:center;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-learning-loading span{display:inline-block;width:16px;height:16px;margin-right:8px;border:2px solid #dff7fa;border-top-color:#2ed2e8;border-radius:50%;vertical-align:-3px;animation:mslLearningSpin .7s linear infinite;}
@keyframes mslLearningSpin{to{transform:rotate(360deg)}}
@media(max-width:720px){
  .msl-db[data-msl-db] .msl-db-learning-head{align-items:flex-start;padding:18px;}
  .msl-db[data-msl-db] .msl-db-learning-head h3{font-size:18px;}
  .msl-db[data-msl-db] .msl-db-learning-badge{padding:7px 9px;font-size:10px;}
  .msl-db[data-msl-db] .msl-db-learning-content{padding:16px;}
  .msl-db[data-msl-db] .msl-db-learning-overview,.msl-db[data-msl-db] .msl-db-learning-points,.msl-db[data-msl-db] .msl-db-exercise-card{padding:16px;border-radius:15px;}
  .msl-db[data-msl-db] .msl-db-exercise-top{align-items:flex-start;flex-direction:column;gap:7px;}
}

/* =========================================================
 * v1.9.0 Study guide: goals / formulas / typical patterns
 * ======================================================= */
.msl-db[data-msl-db] .msl-db-study-card{
  padding:20px 22px;
  margin:0 0 16px;
  border:1px solid #e5f4f6;
  border-radius:18px;
  background:#fff;
  color:#5A5A5A!important;
}
.msl-db[data-msl-db] .msl-db-study-card ul{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:9px;
}
.msl-db[data-msl-db] .msl-db-study-card li{
  position:relative;
  margin:0;
  padding:11px 13px 11px 38px;
  border-radius:12px;
  background:#f5fbfc;
  color:#5A5A5A!important;
  line-height:1.68;
}
.msl-db[data-msl-db] .msl-db-study-card li:before{
  position:absolute;
  left:13px;
  top:11px;
  width:18px;
  height:18px;
  display:grid;
  place-items:center;
  border-radius:50%;
  background:#2ed2e8;
  color:#FFFFFF;
  font-size:10px;
  font-weight:900;
}
.msl-db[data-msl-db] .msl-db-learning-goals li:before{content:'✓';}
.msl-db[data-msl-db] .msl-db-typical li:before{content:'→';}
.msl-db[data-msl-db] .msl-db-memory li:before{content:'!';}
.msl-db[data-msl-db] .msl-db-formulas{
  border-color:rgba(46,210,232,.34);
  background:#f4fdfe;
}
.msl-db[data-msl-db] .msl-db-formulas li{
  padding:13px 15px;
  border:1px solid rgba(46,210,232,.18);
  background:#FFFFFF;
  font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace;
  font-weight:700;
  letter-spacing:.01em;
}
.msl-db[data-msl-db] .msl-db-formulas li:before{display:none;}
.msl-db[data-msl-db] .msl-db-exercise-ident{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:7px;
}
.msl-db[data-msl-db] .msl-db-exercise-theme{
  display:inline-flex;
  align-items:center;
  min-height:28px;
  padding:5px 9px;
  border:1px solid rgba(46,210,232,.26);
  border-radius:999px;
  background:#f4fdfe;
  color:#5A5A5A!important;
  font-size:11px;
  font-weight:800;
}
@media(max-width:720px){
  .msl-db[data-msl-db] .msl-db-study-card{padding:16px;border-radius:15px;}
  .msl-db[data-msl-db] .msl-db-study-card li{padding:10px 11px 10px 35px;}
  .msl-db[data-msl-db] .msl-db-formulas li{padding:12px;overflow-wrap:anywhere;}
}

/* v2.0.0 一問一答 */
.msl-db[data-msl-db] .msl-db-quickchecks{
  margin:28px 0 8px;
  padding:22px;
  border:1px solid rgba(46,210,232,.28);
  border-radius:20px;
  background:#f7fdfe;
  color:#5A5A5A;
}
.msl-db[data-msl-db] .msl-db-quickcheck-heading{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  margin-bottom:16px;
}
.msl-db[data-msl-db] .msl-db-quickcheck-heading>div>span{
  display:block;
  color:#5A5A5A;
  font-size:11px;
  font-weight:800;
  letter-spacing:.14em;
}
.msl-db[data-msl-db] .msl-db-quickcheck-heading h4{
  margin:3px 0 4px!important;
  color:#5A5A5A!important;
  font-size:22px!important;
  line-height:1.35!important;
}
.msl-db[data-msl-db] .msl-db-quickcheck-heading p{
  margin:0!important;
  color:#5A5A5A!important;
  font-size:13px!important;
}
.msl-db[data-msl-db] .msl-db-quickcheck-heading>small{
  flex:0 0 auto;
  min-width:56px;
  padding:8px 11px;
  border-radius:999px;
  background:#2ed2e8;
  color:#FFFFFF!important;
  text-align:center;
  font-weight:800;
}
.msl-db[data-msl-db] .msl-db-quickcheck-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px;
}
.msl-db[data-msl-db] .msl-db-quickcheck-card{
  overflow:hidden;
  border:1px solid #e4edf0;
  border-radius:16px;
  background:#FFFFFF;
  box-shadow:0 6px 18px rgba(72,102,112,.06);
  color:#5A5A5A;
}
.msl-db[data-msl-db] .msl-db-quickcheck-top{
  display:flex;
  align-items:center;
  gap:8px;
  padding:14px 16px 0;
}
.msl-db[data-msl-db] .msl-db-quickcheck-no{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:36px;
  height:28px;
  padding:0 9px;
  border-radius:999px;
  background:#2ed2e8;
  color:#FFFFFF!important;
  font-size:12px;
  font-weight:800;
}
.msl-db[data-msl-db] .msl-db-quickcheck-topic{
  color:#5A5A5A!important;
  font-size:12px;
  font-weight:700;
}
.msl-db[data-msl-db] .msl-db-quickcheck-question{
  min-height:76px;
  padding:14px 16px 16px;
  color:#5A5A5A!important;
  font-size:15px;
  font-weight:700;
  line-height:1.8;
}
.msl-db[data-msl-db] .msl-db-quick-toggle{
  width:100%;
  min-height:46px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:0!important;
  border-top:1px solid #eaf1f3!important;
  border-radius:0!important;
  background:#FFFFFF!important;
  color:#5A5A5A!important;
  font-weight:800!important;
  cursor:pointer;
  box-shadow:none!important;
}
.msl-db[data-msl-db] .msl-db-quick-toggle:hover,
.msl-db[data-msl-db] .msl-db-quick-toggle[aria-expanded="true"]{
  background:#2ed2e8!important;
  color:#FFFFFF!important;
}
.msl-db[data-msl-db] .msl-db-quick-toggle:hover *,
.msl-db[data-msl-db] .msl-db-quick-toggle[aria-expanded="true"] *{
  color:#FFFFFF!important;
}
.msl-db[data-msl-db] .msl-db-quick-toggle .arrow{margin-left:auto;margin-right:14px;font-size:18px;line-height:1;}
.msl-db[data-msl-db] .msl-db-quick-answer{
  padding:16px;
  border-top:1px solid rgba(46,210,232,.22);
  background:#f7fdfe;
  color:#5A5A5A!important;
  line-height:1.8;
}
.msl-db[data-msl-db] .msl-db-quick-answer>strong{
  display:inline-block;
  margin-bottom:8px;
  padding:4px 8px;
  border-radius:6px;
  background:#2ed2e8;
  color:#FFFFFF!important;
  font-size:11px;
  letter-spacing:.08em;
}
.msl-db[data-msl-db] .msl-db-quick-explanation{
  margin:10px 0 0!important;
  padding-top:10px;
  border-top:1px dashed #d7e7ea;
  color:#5A5A5A!important;
  font-size:13px!important;
}
@media (max-width:720px){
  .msl-db[data-msl-db] .msl-db-quickchecks{padding:16px;border-radius:16px;}
  .msl-db[data-msl-db] .msl-db-quickcheck-grid{grid-template-columns:1fr;}
  .msl-db[data-msl-db] .msl-db-quickcheck-question{min-height:0;}
}

/* =========================================================
 * v2.1.0 Membership / student-only question database
 * ======================================================= */
.msl-db[data-msl-db] .msl-db-member-filter-note{
  display:flex;
  gap:13px;
  align-items:flex-start;
  margin-top:18px;
  padding:16px 18px;
  border:1px solid rgba(46,210,232,.28);
  border-radius:15px;
  background:#f7fdfe!important;
  color:#5A5A5A!important;
}
.msl-db[data-msl-db] .msl-db-member-filter-note>.dashicons{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;flex:0 0 34px;
  border-radius:10px;background:#2ed2e8;color:#FFFFFF!important;
}
.msl-db[data-msl-db] .msl-db-member-filter-note strong,
.msl-db[data-msl-db] .msl-db-member-filter-note p{color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-member-filter-note p{margin:4px 0 0!important;font-size:13px;line-height:1.7;}
.msl-db[data-msl-db] .msl-db-area-public{font-size:18px!important;}
.msl-db[data-msl-db] .msl-db-area-public small{font-size:10px!important;}
.msl-db[data-msl-db] .msl-db-member-only-badge{
  display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:999px;
  background:#2ed2e8!important;color:#FFFFFF!important;font-size:12px;font-weight:900;
}
.msl-db[data-msl-db] .msl-db-member-only-badge *{color:#FFFFFF!important;}
.msl-db[data-msl-db] .msl-db-member-statusbar{
  display:flex;align-items:center;gap:8px;margin:0 0 14px;padding:10px 13px;border-radius:12px;
  background:#f7fdfe;color:#5A5A5A!important;font-size:13px;font-weight:800;
}
.msl-db[data-msl-db] .msl-db-member-statusbar>.dashicons{
  display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;background:#2ed2e8;color:#FFFFFF!important;
}
.msl-db[data-msl-db] .msl-db-member-statusbar a{margin-left:auto;color:#5A5A5A!important;text-decoration:underline;font-weight:700;}
.msl-db[data-msl-db] .msl-db-member-gate{
  display:grid;grid-template-columns:90px minmax(0,1.2fr) minmax(300px,.8fr);gap:24px;align-items:center;
  padding:28px;border:1px solid rgba(46,210,232,.28);border-radius:22px;background:linear-gradient(135deg,#FFFFFF 0%,#f6fdfe 100%);
  box-shadow:0 16px 44px rgba(38,80,88,.08);
}
.msl-db[data-msl-db] .msl-db-member-gate-icon{
  width:76px;height:76px;display:flex;align-items:center;justify-content:center;border-radius:22px;background:#2ed2e8;color:#FFFFFF!important;
  box-shadow:0 12px 30px rgba(46,210,232,.25);
}
.msl-db[data-msl-db] .msl-db-member-gate-icon .dashicons{width:34px;height:34px;font-size:34px;color:#FFFFFF!important;}
.msl-db[data-msl-db] .msl-db-member-kicker{display:block;margin-bottom:6px;color:#5A5A5A!important;font-size:11px;font-weight:900;letter-spacing:.12em;}
.msl-db[data-msl-db] .msl-db-member-gate-copy h4{margin:0 0 8px!important;color:#5A5A5A!important;font-size:21px;line-height:1.45;}
.msl-db[data-msl-db] .msl-db-member-gate-copy>p{margin:0!important;color:#5A5A5A!important;font-size:14px;line-height:1.8;}
.msl-db[data-msl-db] .msl-db-member-benefits{display:flex;flex-wrap:wrap;gap:7px 12px;margin-top:14px;}
.msl-db[data-msl-db] .msl-db-member-benefits>span{display:inline-flex;align-items:center;gap:4px;color:#5A5A5A!important;font-size:12px;font-weight:800;}
.msl-db[data-msl-db] .msl-db-member-benefits .dashicons{color:#5A5A5A!important;font-size:15px;width:15px;height:15px;}
.msl-db[data-msl-db] .msl-db-member-login-box{
  padding:18px;border:1px solid #e4eff1;border-radius:16px;background:#FFFFFF!important;color:#5A5A5A!important;
}
.msl-db[data-msl-db] .msl-db-member-login-box>strong{display:block;margin-bottom:4px;color:#5A5A5A!important;font-size:16px;}
.msl-db[data-msl-db] .msl-db-member-login-box>p{margin:0 0 12px!important;color:#5A5A5A!important;font-size:12px;line-height:1.65;}
.msl-db[data-msl-db] .msl-db-member-login-box form p{margin:0 0 10px!important;}
.msl-db[data-msl-db] .msl-db-member-login-box label{display:block;margin-bottom:5px;color:#5A5A5A!important;font-size:12px;font-weight:800;}
.msl-db[data-msl-db] .msl-db-member-login-box input[type="text"],
.msl-db[data-msl-db] .msl-db-member-login-box input[type="password"]{
  width:100%!important;min-height:44px;padding:9px 11px!important;border:1px solid #dbe8ea!important;border-radius:10px!important;background:#FFFFFF!important;color:#5A5A5A!important;box-shadow:none!important;
}
.msl-db[data-msl-db] .msl-db-member-login-box input[type="submit"]{
  width:100%!important;min-height:46px;border:1px solid #2ed2e8!important;border-radius:11px!important;background:#2ed2e8!important;color:#FFFFFF!important;font-weight:900!important;cursor:pointer;
}
.msl-db[data-msl-db] .msl-db-member-login-box .login-remember label{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:600;}
.msl-db[data-msl-db] .msl-db-member-login-links{margin-top:8px;text-align:center;}
.msl-db[data-msl-db] .msl-db-member-login-links a,
.msl-db[data-msl-db] .msl-db-member-switch{color:#5A5A5A!important;font-size:12px;font-weight:800;text-decoration:underline;}
.msl-db[data-msl-db] .msl-db-member-noaccess{text-align:center;color:#5A5A5A!important;}
.msl-db[data-msl-db] .msl-db-member-noaccess>.dashicons{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;margin-bottom:8px;border-radius:50%;background:#2ed2e8;color:#FFFFFF!important;font-size:22px;}
.msl-db[data-msl-db] .msl-db-member-noaccess strong{display:block;color:#5A5A5A!important;font-size:14px;}
.msl-db[data-msl-db] .msl-db-member-noaccess p{margin:7px 0 10px!important;color:#5A5A5A!important;font-size:12px;line-height:1.65;}
.msl-member-account-card{display:flex;gap:10px;align-items:center;padding:14px 16px;border:1px solid #e4eff1;border-radius:14px;background:#f7fdfe;color:#5A5A5A;}
.msl-member-account-card.is-active{border-color:rgba(46,210,232,.4);}
.msl-member-account-card strong,.msl-member-account-card span,.msl-member-account-card a{color:#5A5A5A!important;}
.msl-member-account-card a{margin-left:auto;text-decoration:underline;font-weight:800;}
@media(max-width:980px){
  .msl-db[data-msl-db] .msl-db-member-gate{grid-template-columns:70px 1fr;}
  .msl-db[data-msl-db] .msl-db-member-login-box{grid-column:1/-1;}
  .msl-db[data-msl-db] .msl-db-member-gate-icon{width:62px;height:62px;border-radius:18px;}
}
@media(max-width:640px){
  .msl-db[data-msl-db] .msl-db-member-gate{grid-template-columns:1fr;gap:16px;padding:18px;border-radius:17px;}
  .msl-db[data-msl-db] .msl-db-member-gate-icon{width:52px;height:52px;}
  .msl-db[data-msl-db] .msl-db-member-gate-copy h4{font-size:18px;}
  .msl-db[data-msl-db] .msl-db-member-login-box{grid-column:auto;}
  .msl-member-account-card{align-items:flex-start;flex-direction:column;}
  .msl-member-account-card a{margin-left:0;}
}