/* MKS Learning Blocks v1.4 - compact quiz UI */
:root{
  --mks-purple:#8222EE;
  --mks-purple-dark:#5b12b8;
  --mks-purple-soft:#e9d9fa;
  --mks-purple-soft-2:#f6efff;
  --mks-border:#d9c4f6;
  --mks-text:#34313a;
  --mks-dark:#1d1230;
  --mks-green:#118a39;
  --mks-red:#d71920;
  --mks-yellow:#fff7df;
  --mks-blue-soft:#eef5ff;
}

/* Main concept containers */
.mks-lesson,.mks-concept-page,.mks-learning{
  max-width:1050px;
  margin:0 auto;
  padding:16px;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  color:var(--mks-text);
  background:#fff;
  line-height:1.55;
}
.mks-lesson *,.mks-concept-page *,.mks-learning *{box-sizing:border-box}

.mks-hero{
  background:linear-gradient(135deg,var(--mks-purple),var(--mks-purple-dark));
  color:#fff;
  padding:26px 22px;
  border-radius:20px;
  margin-bottom:20px;
  box-shadow:0 12px 28px rgba(130,34,238,.20);
}
.mks-topic-label{
  display:inline-block;
  background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.35);
  padding:6px 11px;
  border-radius:999px;
  font-size:12px;
  font-weight:800;
  letter-spacing:.35px;
  margin-bottom:10px;
}
.mks-hero h1{
  margin:0 0 8px;
  font-size:32px;
  line-height:1.15;
  font-weight:850;
  letter-spacing:-.5px;
  color:#fff;
}
.mks-hero p{
  margin:0;
  max-width:890px;
  font-size:15px;
  color:#f6ecff;
}

.mks-box,.mks-card{
  background:#fff;
  border:1px solid var(--mks-border);
  border-radius:16px;
  padding:17px;
  margin:16px 0;
  box-shadow:0 6px 16px rgba(130,34,238,.055);
}
.mks-highlight{background:var(--mks-purple-soft-2);border-left:5px solid var(--mks-purple)}
.mks-warning{background:var(--mks-yellow);border-left:5px solid #f59e0b;border-color:#ffe3a6}
.mks-blue{background:var(--mks-blue-soft);border-left:5px solid #3b82f6;border-color:#cfe0ff}

.mks-section-title{
  color:var(--mks-purple);
  font-size:25px;
  font-weight:850;
  margin:28px 0 12px;
  padding-bottom:8px;
  border-bottom:2px solid var(--mks-border);
  letter-spacing:-.2px;
}
.mks-box h3,.mks-card h3{
  margin:0 0 9px;
  color:var(--mks-purple);
  font-size:20px;
  font-weight:850;
}
.mks-box p,.mks-card p{margin:7px 0;font-size:15px}

.mks-formula{
  background:#171020;
  color:#fff;
  border-radius:12px;
  padding:13px 15px;
  margin:12px 0;
  font-size:15px;
  font-weight:750;
  overflow-x:auto;
}
.mks-formula span{color:#d9b8ff}

.mks-grid-2,.mks-grid-3,.mks-key-grid{display:grid;gap:14px;margin:16px 0}
.mks-grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.mks-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.mks-key-grid{grid-template-columns:repeat(7,minmax(0,1fr))}

.mks-mini-card,.mks-key-item{
  background:#fff;
  border:1px solid var(--mks-border);
  border-radius:14px;
  padding:14px;
  box-shadow:0 4px 12px rgba(130,34,238,.05);
}
.mks-key-item{text-align:center;font-weight:850;color:var(--mks-dark);padding:10px 7px}
.mks-key-item strong{color:var(--mks-purple)}
.mks-mini-card h4{margin:0 0 7px;color:var(--mks-dark);font-size:17px;font-weight:850}
.mks-mini-card p{margin:5px 0;font-size:14.5px}

.mks-table-wrap{overflow-x:auto;margin:14px 0;border-radius:14px;border:1px solid var(--mks-border)}
.mks-table{width:100%;border-collapse:collapse;min-width:680px;background:#fff}
.mks-table th{background:var(--mks-purple);color:#fff;padding:10px;text-align:left;font-size:13.5px;border:1px solid #9d54f2}
.mks-table td{padding:10px;border:1px solid var(--mks-border);font-size:14px;vertical-align:top}
.mks-table tr:nth-child(even) td{background:#fbf8ff}

.mks-step{display:flex;gap:12px;background:#fff;border:1px solid var(--mks-border);border-radius:14px;padding:13px;margin:10px 0}
.mks-step-number{min-width:32px;height:32px;background:var(--mks-purple);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:850}
.mks-step-content h4{margin:0 0 4px;color:var(--mks-dark);font-size:16px}
.mks-step-content p{margin:0;font-size:14.5px}

.mks-example{border:1px solid var(--mks-border);border-radius:16px;padding:16px;margin:14px 0;background:linear-gradient(180deg,#fff,#fbf8ff)}
.mks-example h4{margin:0 0 9px;color:var(--mks-purple);font-size:18px;font-weight:850}
.mks-solution{background:#fff;border-left:5px solid var(--mks-green);padding:11px 13px;border-radius:10px;margin-top:9px}
.mks-solution strong{color:var(--mks-green)}
.mks-list{padding-left:20px;margin:9px 0}
.mks-list li{margin-bottom:7px;font-size:15px}

.mks-final-summary,.mks-answer-key{
  background:linear-gradient(135deg,var(--mks-purple),var(--mks-purple-dark));
  color:#fff;
  padding:20px;
  border-radius:18px;
  margin-top:28px;
}
.mks-final-summary h2,.mks-answer-key h2{margin:0 0 10px;font-size:24px;color:#fff}
.mks-final-summary ul{margin:0;padding-left:20px}
.mks-final-summary li{margin-bottom:7px;color:#f6ecff}

/* Class Material */
.mks-class-material .mks-q-list{display:grid;grid-template-columns:1fr;gap:13px;margin:16px 0}
.mks-class-material .mks-q-card{
  background:linear-gradient(180deg,#ffffff,#fbf8ff);
  border:1px solid var(--mks-border);
  border-radius:16px;
  padding:15px 17px;
  margin:0;
  box-shadow:0 6px 18px rgba(130,34,238,.065);
}
.mks-class-material .mks-q-card h4{margin:0 0 10px;color:var(--mks-purple);font-size:17px;line-height:1.4;font-weight:850}
.mks-class-material .mks-q-card p{margin:7px 0;font-size:14.5px}
.mks-class-material .mks-options-line{display:flex;flex-wrap:wrap;gap:8px;margin-top:9px}
.mks-class-material .mks-options-line span{background:#fff;border:1px solid var(--mks-border);border-radius:999px;padding:6px 10px;font-weight:650;color:var(--mks-dark);font-size:14px}

/* Compact Quiz Layout */
.mks-mc-quiz{
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  color:#1c1c21;
  line-height:1.45;
  width:100%;
  max-width:850px;
  margin:18px auto;
}
.mks-mc-quiz h1{
  text-align:center;
  color:#333;
  border-bottom:2px solid var(--mks-purple);
  padding-bottom:9px;
  margin:0 0 8px;
  font-size:26px;
  font-weight:850;
}
.mks-mc-quiz .test-subtitle{
  text-align:center;
  font-weight:800;
  color:var(--mks-purple);
  margin:0 0 14px;
  font-size:15px;
}
.mks-mc-quiz .q-card{
  background:#e9d9fa;
  border:1px solid #c9a8f2;
  border-radius:15px;
  padding:15px 16px;
  margin:14px 0;
  box-shadow:0 8px 20px rgba(130,34,238,.12);
  color:#20162d;
}
.mks-mc-quiz .q-head{
  font-weight:760;
  font-size:17px;
  line-height:1.35;
  margin-bottom:11px;
  padding-bottom:10px;
  border-bottom:1px solid #d4bdf3;
  color:#20162d;
}
.mks-mc-quiz .q-head .q-number{
  display:inline-block;
  background:var(--mks-purple);
  color:#fff;
  padding:2px 8px;
  border-radius:7px;
  margin-right:8px;
  font-size:15px;
  line-height:1.5;
  box-shadow:none;
}
.mks-mc-quiz .q-card .q-text{color:#20162d}
.mks-mc-quiz .q-card p,
.mks-mc-quiz .q-card strong{
  color:#20162d;
}
.mks-mc-quiz .options{
  list-style-type:none;
  padding-left:0;
  margin:0;
}
.mks-mc-quiz .options li{
  padding:5px 0;
}
.mks-mc-quiz .options label{
  display:block;
  padding:9px 11px;
  border-radius:9px;
  background:#fff;
  border:1px solid #dfd7ea;
  cursor:pointer;
  color:#20162d;
  font-size:14.5px;
  font-weight:600;
  line-height:1.35;
  box-shadow:none;
}
.mks-mc-quiz .options label:hover{
  background:#f7f1ff;
  border-color:#c9a8f2;
}
.mks-mc-quiz .options input[type="radio"]{
  margin-right:8px;
  accent-color:var(--mks-purple);
}
.mks-mc-quiz .btn{
  font-family:inherit;
  font-size:14.5px;
  font-weight:750;
  color:#fff;
  border:none;
  border-radius:9px;
  padding:9px 16px;
  cursor:pointer;
  transition:all .2s ease;
}
.mks-mc-quiz .btn:hover:not(:disabled){opacity:.9;transform:translateY(-1px)}
.mks-mc-quiz .btn:disabled{background-color:#ccc;cursor:not-allowed;transform:none}
.mks-mc-quiz .btn.check-one{
  background:var(--mks-purple);
  color:#fff;
  border-radius:9px;
  margin-top:8px;
  box-shadow:0 6px 14px rgba(130,34,238,.18);
}
.mks-mc-quiz .correct{
  outline:2px solid #168a3a;
  background:#dff5e7;
}
.mks-mc-quiz .incorrect{
  outline:2px solid #c62828;
  background:#ffe6e6;
}
.mks-mc-quiz .explain{
  background:#fff;
  color:#20162d;
  border:1px solid #d4bdf3;
  border-left:5px solid var(--mks-purple);
  border-radius:10px;
  padding:10px 11px;
  margin-top:10px;
  font-size:14.5px;
  line-height:1.45;
}
.mks-mc-quiz .explain strong{color:var(--mks-purple)}
.mks-mc-quiz .controls{
  background:#fff;
  border:1px solid #dfd7ea;
  border-radius:12px;
  padding:14px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  margin-top:16px;
}
.mks-mc-quiz .controls .btn{margin-right:8px}
.mks-mc-quiz .controls .check-all{background-color:#1e88e5}
.mks-mc-quiz .controls .reset{background-color:#e53935}
.mks-mc-quiz .score{
  font-size:15px;
  font-weight:750;
  color:#333;
  background:#f1f1ff;
  padding:8px 12px;
  border-radius:8px;
  white-space:nowrap;
}
sup{font-size:72%;font-weight:700}

@media(max-width:768px){
  .mks-lesson,.mks-concept-page,.mks-learning{padding:12px}
  .mks-hero{padding:22px 18px}
  .mks-hero h1{font-size:27px}
  .mks-section-title{font-size:22px}
  .mks-grid-2,.mks-grid-3{grid-template-columns:1fr}
  .mks-key-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .mks-class-material .mks-options-line span{width:100%}
  .mks-step{flex-direction:column}
  .mks-table{min-width:620px}
  .mks-mc-quiz{margin:12px auto}
  .mks-mc-quiz h1{font-size:23px}
  .mks-mc-quiz .q-card{padding:13px;margin:12px 0}
  .mks-mc-quiz .q-head{font-size:16px}
  .mks-mc-quiz .controls{flex-direction:column;align-items:stretch}
  .mks-mc-quiz .btn{width:100%;margin:5px 0}
  .mks-mc-quiz .score{text-align:center}
}