:root{
  --mksm-primary:#8222ee;
  --mksm-primary-dark:#5b17b5;
  --mksm-primary-soft:#f7f0ff;
  --mksm-primary-softer:#fbf8ff;
  --mksm-border:#e6d6ff;
  --mksm-border-strong:#d3b7ff;
  --mksm-text:#171421;
  --mksm-muted:#625d71;
  --mksm-card:#ffffff;
  --mksm-green:#0f9f6e;
  --mksm-red:#dc2626;
  --mksm-amber:#b45309;
  --mksm-shadow:0 14px 40px rgba(87,34,150,.08);
}

.mksm-lesson,.mksm-dashboard{max-width:1120px;margin:0 auto;padding:24px 18px 70px;color:var(--mksm-text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55;box-sizing:border-box;overflow-x:hidden}
.mksm-lesson *,.mksm-dashboard *{box-sizing:border-box}
.mksm-hero{border-radius:24px;background:linear-gradient(135deg,#9c2cff 0%,#8222ee 48%,#3e126d 100%);color:#fff;padding:34px 38px;box-shadow:var(--mksm-shadow);position:relative;overflow:hidden;margin:0 0 18px}
.mksm-hero:after{content:"";position:absolute;right:-72px;top:-80px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.18)}
.mksm-kicker{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(255,255,255,.35);background:rgba(255,255,255,.12);border-radius:999px;padding:8px 14px;text-transform:uppercase;letter-spacing:.08em;font-size:12px;font-weight:850;margin-bottom:16px;position:relative;z-index:1}
.mksm-hero h1{font-size:clamp(30px,4.5vw,52px);line-height:1.02;margin:0 0 10px;font-weight:900;color:#fff;letter-spacing:-.04em;position:relative;z-index:1}
.mksm-hero p{font-size:clamp(16px,2.3vw,21px);max-width:820px;margin:0;color:rgba(255,255,255,.92);position:relative;z-index:1}
.mksm-chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;position:relative;z-index:1}.mksm-chip{display:inline-flex;align-items:center;border:1px solid rgba(255,255,255,.32);background:rgba(255,255,255,.14);border-radius:999px;padding:8px 12px;font-size:13px;font-weight:800;color:#fff}.mksm-chip:before{content:"";width:8px;height:8px;border-radius:50%;background:#fff;margin-right:8px;opacity:.85}

.mksm-card,.mksm-practice{background:linear-gradient(180deg,#fff 0%,#fff 70%,#fcf9ff 100%);border:1px solid var(--mksm-border);border-radius:20px;padding:26px;margin:16px 0;box-shadow:0 8px 26px rgba(70,38,120,.045)}
.mksm-section-title{font-size:clamp(24px,3vw,34px);line-height:1.15;margin:0 0 16px;color:var(--mksm-primary);font-weight:900;letter-spacing:-.03em;display:flex;align-items:center;gap:10px}.mksm-section-title:before{content:"";width:7px;height:32px;border-radius:999px;background:var(--mksm-primary);box-shadow:0 0 0 7px #f1e4ff}
.mksm-card h3,.mksm-practice h3{font-size:20px;margin:18px 0 8px;color:#211b2d}.mksm-card p,.mksm-practice p{font-size:16.5px;margin:10px 0;color:var(--mksm-text)}
.mksm-checklist{list-style:none;padding:0;margin:10px 0;display:grid;gap:10px}.mksm-checklist li{position:relative;padding-left:34px;font-size:16px}.mksm-checklist li:before{content:"✓";position:absolute;left:0;top:0;width:23px;height:23px;border-radius:50%;display:grid;place-items:center;background:var(--mksm-primary);color:#fff;font-weight:900;font-size:13px}
.mksm-grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.mksm-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.mksm-mini{border:1px solid var(--mksm-border);background:var(--mksm-primary-softer);border-radius:16px;padding:18px}.mksm-mini strong{display:block;color:var(--mksm-primary-dark);font-size:16px;margin-bottom:6px}.mksm-mini p{font-size:15px;color:var(--mksm-muted);margin:0}
.mksm-tip,.mksm-warning,.mksm-rule{border:1px solid var(--mksm-border);border-left:6px solid var(--mksm-primary);background:#fff;border-radius:16px;padding:16px 18px;margin:16px 0;color:var(--mksm-text)}.mksm-tip strong,.mksm-warning strong,.mksm-rule strong{color:#181421}.mksm-warning{border-left-color:#f59e0b;background:#fffaf2}.mksm-rule{border-left-color:#16a34a;background:#f3fff8}

.mksm-formula-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.mksm-formula{border:1px solid var(--mksm-border);background:#fff;border-radius:16px;padding:16px}.mksm-formula strong{display:block;color:var(--mksm-primary);font-size:15px;margin-bottom:8px}.mksm-eq,.mksm-inline-eq{font-family:Georgia,"Times New Roman",serif;color:#15121f}.mksm-eq{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:20px;background:#fbf8ff;border:1px solid #eadcff;border-radius:12px;padding:10px 12px;margin:8px 0}.mksm-inline-eq{display:inline-flex;align-items:center;gap:4px;background:#fbf8ff;border:1px solid #eadcff;border-radius:7px;padding:1px 6px;font-size:1.02em;vertical-align:middle}.mksm-frac{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;line-height:1;text-align:center;vertical-align:middle;min-width:1.5em;margin:0 .15em;font-family:Georgia,"Times New Roman",serif}.mksm-frac>span:first-child{display:block;border-bottom:1.7px solid currentColor;padding:0 .18em .12em}.mksm-frac>span:last-child{display:block;padding:.12em .18em 0}.mksm-sup{font-size:.68em;vertical-align:super;margin-left:1px}.mksm-sub{font-size:.68em;vertical-align:sub}.mksm-sqrt{display:inline-flex;align-items:flex-start;gap:2px;font-family:Georgia,"Times New Roman",serif}.mksm-sqrt .radicand{border-top:1.7px solid currentColor;padding:.05em .15em 0 .15em}.mksm-matrix{display:inline-grid;grid-template-columns:1fr 1fr;gap:4px 8px;border-left:2px solid currentColor;border-right:2px solid currentColor;padding:3px 8px;margin:0 4px}.mksm-pill{display:inline-flex;align-items:center;border-radius:999px;padding:4px 10px;background:#f4ecff;color:var(--mksm-primary);font-weight:850;font-size:13px}

.mksm-svg-wrap{border:1px solid var(--mksm-border);border-radius:18px;background:#fff;padding:14px;margin:16px auto;max-width:760px;overflow-x:auto}.mksm-svg{display:block;max-width:100%;height:auto;margin:0 auto}.mksm-grid-line{stroke:#ece5f8;stroke-width:1}.mksm-axis{stroke:#8b91a4;stroke-width:1.6}.mksm-plot-line{stroke:var(--mksm-primary);stroke-width:3.2;stroke-linecap:round}.mksm-plot-line-thin{stroke:var(--mksm-primary);stroke-width:2.2;stroke-linecap:round}.mksm-plot-point{fill:#11a97d;stroke:white;stroke-width:2}.mksm-svg text{font-family:Inter,ui-sans-serif,system-ui;font-weight:700;fill:#261d36}.mksm-svg .label-small{font-size:13px;fill:#625d71}.mksm-svg .label-purple{fill:var(--mksm-primary);font-weight:900}.mksm-graph-note{font-size:14px;color:var(--mksm-muted);text-align:center;margin-top:8px}

.mksm-example{border:1px solid var(--mksm-border);border-radius:16px;background:#fff;padding:18px;margin:14px 0}.mksm-example h3{margin-top:0;color:#1e1930}.mksm-example ol{padding-left:22px}.mksm-example li{margin:8px 0}.mksm-q{border:1px solid var(--mksm-border);background:#fff;border-radius:18px;padding:18px;margin:14px 0}.mksm-q-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px;font-size:13px;font-weight:900;color:var(--mksm-primary);text-transform:uppercase;letter-spacing:.04em}.mksm-choices{display:grid;gap:10px;margin-top:12px}.mksm-choice{display:grid;grid-template-columns:38px 1fr;align-items:center;gap:12px;border:1px solid var(--mksm-border);border-radius:14px;background:#fff;padding:11px 13px}.mksm-choice>span:first-child{width:32px;height:32px;border-radius:10px;background:var(--mksm-primary);color:#fff;display:grid;place-items:center;font-weight:900}.mksm-choice p{margin:0;font-size:16px;color:#1f1b2b}.mksm-answer-key{border:1px solid #b7f0cc;background:#f7fff9;border-radius:18px;padding:18px;margin:20px 0}.mksm-answer-key h2{margin:0 0 12px;color:#0f7f53;font-size:24px}.mksm-answer-key details{background:#fff;border:1px solid #c5f4d5;border-radius:12px;padding:11px 13px;margin:9px 0}.mksm-answer-key summary{cursor:pointer;font-weight:850;color:#111827}.mksm-answer-key .ans{color:#0f7f53}.mksm-step-table{width:100%;border-collapse:collapse;margin:14px 0;overflow:hidden;border-radius:14px;border:1px solid var(--mksm-border);font-size:15px}.mksm-step-table th,.mksm-step-table td{border:1px solid var(--mksm-border);padding:10px 12px;text-align:left}.mksm-step-table th{background:#f5edff;color:#5416a4}

@media(max-width:760px){.mksm-lesson,.mksm-dashboard{padding:14px 10px 50px}.mksm-hero{padding:24px 20px;border-radius:18px}.mksm-card,.mksm-practice{padding:18px;border-radius:16px}.mksm-grid-2,.mksm-grid-3,.mksm-formula-grid{grid-template-columns:1fr}.mksm-section-title{font-size:25px}.mksm-card p,.mksm-practice p{font-size:15.5px}.mksm-eq{font-size:18px;overflow-x:auto;white-space:normal}.mksm-choice{grid-template-columns:34px 1fr;padding:10px}.mksm-choice>span:first-child{width:30px;height:30px}.mksm-svg-wrap{padding:8px}.mksm-q-head{align-items:flex-start;flex-direction:column}}

/* v1.9 long question bank support */
.mksm-long-practice{background:#fff;}.mksm-long-practice .mksm-q{box-shadow:none}.mksm-svg-compact{max-height:360px}.mksm-hero-light{background:linear-gradient(135deg,#f8f1ff,#ffffff 54%,#f4fff9);color:#211735;border:1px solid var(--mksm-border)}.mksm-hero-light h1{color:#5416a4}.mksm-hero-light p{color:#4c465f}.mksm-source-note{font-size:13px;color:#6b647c}.mksm-lesson .mksm-choice p{overflow-wrap:anywhere}.mksm-lesson .mksm-inline-eq{white-space:normal}.mksm-long-practice .mksm-q{break-inside:avoid}


/* v1.10 compact answer-key cards */
.mksm-answer-key{border:1px solid var(--mksm-border-strong);background:linear-gradient(180deg,#fff 0%,#fbf7ff 100%);border-radius:18px;padding:20px;margin:22px 0;box-shadow:0 10px 28px rgba(130,34,238,.055)}
.mksm-answer-key h2{margin:0 0 14px;color:#5b17d2;font-size:clamp(22px,2.8vw,30px);line-height:1.1;font-weight:900;letter-spacing:-.03em}
.mksm-ak-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;margin:12px 0 2px}
.mksm-ak-card{display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:9px;min-height:50px;border:1px solid #e6d7ff;background:#fbf8ff;border-radius:12px;padding:8px 10px;color:#221b32;box-shadow:0 4px 12px rgba(130,34,238,.035)}
.mksm-ak-num{display:grid;place-items:center;min-width:34px;height:34px;border-radius:9px;background:#efe7ff;color:#6414cf;font-weight:900;font-size:18px;line-height:1}
.mksm-ak-choice{display:grid;place-items:center;min-width:42px;height:34px;border-radius:9px;background:var(--mksm-primary);color:#fff;font-weight:900;font-size:18px;line-height:1;padding:0 10px;text-transform:uppercase}
.mksm-ak-choice.spr{font-size:12px;letter-spacing:.04em;min-width:52px;background:linear-gradient(135deg,#8a2bf2,#6420c8)}
.mksm-ak-value{font-weight:850;font-size:17px;line-height:1.15;color:#242033;overflow-wrap:anywhere}
.mksm-solution-list{border:1px solid #d8c2ff;background:#fff;border-radius:18px;padding:18px;margin:18px 0}.mksm-solution-list h2{margin:0 0 10px;color:#5b17d2;font-size:24px}.mksm-solution-list details{border:1px solid #eadfff;background:#fff;border-radius:12px;padding:11px 13px;margin:9px 0}.mksm-solution-list summary{cursor:pointer;font-weight:850;color:#1e1930}.mksm-solution-list .ans{color:#0f7f53}
@media(max-width:1040px){.mksm-ak-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:680px){.mksm-ak-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.mksm-ak-card{grid-template-columns:auto auto 1fr;min-height:46px;padding:7px}.mksm-ak-num{min-width:30px;height:30px;font-size:15px}.mksm-ak-choice{min-width:36px;height:30px;font-size:15px}.mksm-ak-choice.spr{min-width:44px;font-size:10px}.mksm-ak-value{font-size:15px}.mksm-answer-key{padding:14px}}

/* Interactive SAT Math class material */
.mksm-class-material{
  --mksm-cm-ink:#172033;
  --mksm-cm-muted:#5f6b7a;
  --mksm-cm-border:#d8dee8;
  --mksm-cm-soft:#f5f7fa;
  --mksm-cm-accent:#1d4ed8;
  --mksm-cm-accent-soft:#eff6ff;
  --mksm-cm-correct:#15803d;
  --mksm-cm-correct-soft:#f0fdf4;
  --mksm-cm-error:#b42318;
  --mksm-cm-error-soft:#fff4f2;
  width:100%;
  max-width:none;
  margin:0;
  padding:20px 16px 64px;
  color:var(--mksm-cm-ink);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.55;
  letter-spacing:0;
}
.mksm-class-material,.mksm-class-material *{box-sizing:border-box}
.mksm-cm-header{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;padding:16px 0 20px;border-bottom:2px solid var(--mksm-cm-ink);margin-bottom:28px}
.mksm-cm-kicker{margin:0 0 4px;color:var(--mksm-cm-accent);font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:0}
.mksm-cm-header h1{margin:0;color:var(--mksm-cm-ink);font-size:30px;line-height:1.18;font-weight:800;letter-spacing:0}
.mksm-cm-subtitle{margin:6px 0 0;color:var(--mksm-cm-muted);font-size:16px}
.mksm-cm-progress{display:flex;align-items:baseline;gap:5px;flex:0 0 auto;margin:0;color:var(--mksm-cm-muted);font-size:15px}
.mksm-cm-progress strong{color:var(--mksm-cm-correct);font-size:26px;line-height:1;font-weight:850}
.mksm-cm-section{margin:0 0 36px}
.mksm-cm-section>h2{margin:0 0 14px;padding:0 0 8px;border-bottom:1px solid var(--mksm-cm-border);color:var(--mksm-cm-ink);font-size:20px;line-height:1.3;font-weight:800;letter-spacing:0}
.mksm-cm-question-list{display:grid;grid-template-columns:minmax(0,1fr);gap:14px}
.mksm-cm-question{width:100%;min-width:0;margin:0;padding:22px;border:1px solid var(--mksm-cm-border);border-radius:8px;background:#fff;box-shadow:0 3px 14px rgba(15,23,42,.045)}
.mksm-cm-number{margin:0 0 10px;color:var(--mksm-cm-accent);font-size:13px;line-height:1.2;font-weight:850;text-transform:uppercase;letter-spacing:0}
.mksm-cm-prompt{color:var(--mksm-cm-ink);font-size:18px;line-height:1.62;font-weight:560;overflow-wrap:anywhere}
.mksm-cm-prompt p{margin:0 0 10px;font:inherit;color:inherit}
.mksm-cm-prompt p:last-child{margin-bottom:0}
.mksm-cm-prompt mjx-container,.mksm-cm-choice-content mjx-container,.mksm-cm-prompt .katex-display,.mksm-cm-choice-content .katex-display{max-width:100%;overflow-x:auto;overflow-y:hidden}
.mksm-cm-regression-table{display:block;width:100%;max-width:100%;margin:14px 0;overflow-x:auto;overflow-y:hidden}
.mksm-cm-table-wrap{display:block;width:100%;max-width:100%;margin:14px 0;overflow-x:auto;overflow-y:hidden;border:1px solid var(--mksm-cm-border);border-radius:6px;background:#fff}
.mksm-cm-data-table{width:100%;min-width:520px;border-collapse:collapse;color:var(--mksm-cm-ink);font-size:14px;line-height:1.35}
.mksm-cm-data-table caption{padding:10px 12px;border-bottom:1px solid var(--mksm-cm-border);font-weight:800;text-align:left}
.mksm-cm-data-table th,.mksm-cm-data-table td{padding:9px 11px;border-right:1px solid var(--mksm-cm-border);border-bottom:1px solid var(--mksm-cm-border);text-align:center;white-space:nowrap}
.mksm-cm-data-table th{background:#f4f7ff;font-weight:800}
.mksm-cm-data-table tbody th{text-align:left}
.mksm-cm-data-table tr:last-child th,.mksm-cm-data-table tr:last-child td{border-bottom:0}
.mksm-cm-data-table th:last-child,.mksm-cm-data-table td:last-child{border-right:0}
.mksm-cm-figure{width:min(100%,700px);margin:18px auto 8px;padding:12px;border:1px solid var(--mksm-cm-border);border-radius:6px;background:#fff;text-align:center}
.mksm-cm-figure img{display:block;width:auto;max-width:100%;max-height:360px;height:auto;margin:0 auto;object-fit:contain}
.mksm-cm-options{display:grid;grid-template-columns:minmax(0,1fr);gap:9px;margin:18px 0 0}
.mksm-cm-option{display:grid;grid-template-columns:38px minmax(0,1fr);align-items:center;gap:12px;width:100%;min-height:52px;margin:0;padding:9px 12px;border:1px solid var(--mksm-cm-border);border-radius:6px;background:#fff;color:var(--mksm-cm-ink);font:inherit;text-align:left;cursor:pointer;transition:border-color .15s ease,background-color .15s ease,box-shadow .15s ease}
.mksm-cm-option:hover,.mksm-cm-option:focus,.mksm-cm-option:active{border-color:#6f8fc8;background:#f4f7ff;color:var(--mksm-cm-ink)!important}
.mksm-cm-option:focus-visible,.mksm-cm-check:focus-visible,.mksm-cm-response input:focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:2px}
.mksm-cm-option.is-selected{border-color:var(--mksm-cm-accent);background:var(--mksm-cm-accent-soft);box-shadow:inset 3px 0 0 var(--mksm-cm-accent)}
.mksm-cm-choice-key{display:grid;place-items:center;width:32px;height:32px;border:1px solid #aeb8c7;border-radius:50%;background:var(--mksm-cm-soft);color:var(--mksm-cm-ink);font-size:14px;font-weight:850}
.mksm-cm-option.is-selected .mksm-cm-choice-key{border-color:var(--mksm-cm-accent);background:var(--mksm-cm-accent);color:#fff}
.mksm-cm-option .mksm-cm-choice-content,.mksm-cm-option .mksm-cm-choice-content *{color:var(--mksm-cm-ink)!important}
.mksm-cm-option .mksm-cm-choice-content mjx-container,.mksm-cm-option .mksm-cm-choice-content mjx-container *,.mksm-cm-option .mksm-cm-choice-content .katex,.mksm-cm-option .mksm-cm-choice-content .katex *{border-color:currentColor!important}
.mksm-cm-choice-content{min-width:0;color:var(--mksm-cm-ink)!important;font-size:16px;line-height:1.5;overflow-wrap:anywhere}
.mksm-cm-choice-content>span{display:block}
.mksm-cm-option.has-image{align-items:start;padding-top:12px;padding-bottom:12px}
.mksm-cm-option.has-image .mksm-cm-choice-content img{display:block;width:auto;max-width:100%;max-height:240px;height:auto;margin:0 auto;object-fit:contain}
.mksm-cm-response{display:grid;gap:7px;margin:18px 0 0;color:var(--mksm-cm-ink);font-size:14px;font-weight:750}
.mksm-cm-response input{width:min(100%,320px);height:46px;border:1px solid #aeb8c7;border-radius:6px;background:#fff;color:var(--mksm-cm-ink);font:500 17px/1.2 inherit;padding:9px 12px}
.mksm-cm-actions{display:flex;align-items:center;gap:14px;min-height:44px;margin-top:16px}
.mksm-cm-check{display:inline-flex;align-items:center;justify-content:center;min-width:104px;height:42px;border:1px solid var(--mksm-cm-accent);border-radius:6px;background:var(--mksm-cm-accent);color:#fff;font:800 15px/1 inherit;cursor:pointer}
.mksm-cm-check:hover{background:#173ea9;border-color:#173ea9}
.mksm-cm-feedback{min-width:0;margin:0;color:var(--mksm-cm-muted);font-size:14px;font-weight:750}
.mksm-cm-question.is-correct{border-color:#79c693;background:var(--mksm-cm-correct-soft)}
.mksm-cm-question.is-correct .mksm-cm-feedback{color:var(--mksm-cm-correct)}
.mksm-cm-question.is-incorrect{border-color:#e6a39d;background:var(--mksm-cm-error-soft)}
.mksm-cm-question.is-incorrect .mksm-cm-feedback{color:var(--mksm-cm-error)}
@media(min-width:720px){.mksm-cm-options:has(.mksm-cm-option.has-image){grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:719px){
  .mksm-class-material{padding:12px 10px 48px}
  .mksm-cm-header{align-items:flex-start;padding-top:10px;margin-bottom:22px}
  .mksm-cm-header h1{font-size:24px}
  .mksm-cm-subtitle{font-size:14px}
  .mksm-cm-question{padding:17px 14px}
  .mksm-cm-prompt{font-size:16px}
  .mksm-cm-option{grid-template-columns:34px minmax(0,1fr);padding:9px}
  .mksm-cm-choice-key{width:29px;height:29px}
  .mksm-cm-actions{align-items:flex-start;flex-direction:column;gap:8px}
  .mksm-cm-check{width:100%}
  .mksm-cm-figure{padding:7px}
  .mksm-cm-figure img{max-height:280px}
  .mksm-cm-option.has-image .mksm-cm-choice-content img{max-height:220px}
}

/* SAT Math concept lessons */
.mksm-concept{
  --mksm-concept-ink:#172033;
  --mksm-concept-muted:#586579;
  --mksm-concept-border:#d8dee8;
  --mksm-concept-soft:#f5f7fa;
  --mksm-concept-blue:#1d4ed8;
  --mksm-concept-blue-soft:#eff6ff;
  --mksm-concept-green:#147a45;
  --mksm-concept-green-soft:#effaf3;
  --mksm-concept-amber:#9a5a05;
  --mksm-concept-amber-soft:#fff8e8;
  width:100%;
  max-width:none;
  margin:0;
  padding:20px 16px 64px;
  color:var(--mksm-concept-ink);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.62;
  letter-spacing:0;
}
.mksm-concept,.mksm-concept *{box-sizing:border-box}
.mksm-concept-header{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding:16px 0 22px;border-bottom:2px solid var(--mksm-concept-ink)}
.mksm-concept-kicker,.mksm-concept-section-head>p,.mksm-concept-formula-sheet>header>p{margin:0 0 5px;color:var(--mksm-concept-blue);font-size:12px;font-weight:850;text-transform:uppercase;letter-spacing:0}
.mksm-concept-header h1{margin:0;color:var(--mksm-concept-ink);font-size:32px;line-height:1.15;font-weight:850;letter-spacing:0}
.mksm-concept-subtitle{max-width:820px;margin:7px 0 0;color:var(--mksm-concept-muted);font-size:16px}
.mksm-concept-level{flex:0 0 auto;margin:0;padding:7px 11px;border:1px solid #adc2ef;border-radius:6px;background:var(--mksm-concept-blue-soft);color:#173b91;font-size:13px;font-weight:800}
.mksm-concept-overview{max-width:920px;margin:22px 0 0;color:var(--mksm-concept-ink);font-size:18px;font-weight:560}
.mksm-concept-overview p{margin:0}
.mksm-concept-outcomes{margin:24px 0 8px;padding:18px 0;border-top:1px solid var(--mksm-concept-border);border-bottom:1px solid var(--mksm-concept-border)}
.mksm-concept-outcomes h2{margin:0 0 12px;color:var(--mksm-concept-ink);font-size:18px;line-height:1.3}
.mksm-concept-outcomes ul,.mksm-concept-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 28px;margin:0;padding:0;list-style:none}
.mksm-concept-outcomes li,.mksm-concept-list li{position:relative;padding-left:22px;color:var(--mksm-concept-ink)}
.mksm-concept-outcomes li:before,.mksm-concept-list li:before{content:"";position:absolute;top:.68em;left:2px;width:8px;height:8px;border-radius:50%;background:var(--mksm-concept-green)}
.mksm-concept-section{padding:34px 0;border-bottom:1px solid var(--mksm-concept-border)}
.mksm-concept-section-head{max-width:980px;margin:0 0 20px}
.mksm-concept-section-head h2,.mksm-concept-formula-sheet h2{margin:0;color:var(--mksm-concept-ink);font-size:25px;line-height:1.25;font-weight:850;letter-spacing:0}
.mksm-concept-section-summary{max-width:900px;margin:7px 0 0;color:var(--mksm-concept-muted);font-size:17px}
.mksm-concept-section-summary p{margin:0}
.mksm-concept-body{max-width:1100px;color:var(--mksm-concept-ink);font-size:16px}
.mksm-concept-body h3{margin:24px 0 8px;color:#263247;font-size:19px;line-height:1.3}
.mksm-concept-body p{margin:9px 0}
.mksm-concept-body ol{margin:10px 0;padding-left:24px}
.mksm-concept-body ol li{margin:7px 0;padding-left:4px}
.mksm-concept-body strong{font-weight:800}
.mksm-concept-formula-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:16px 0}
.mksm-concept-rule{min-width:0;padding:15px;border:1px solid var(--mksm-concept-border);border-radius:6px;background:#fff}
.mksm-concept-rule strong{display:block;margin:0 0 6px;color:#263247;font-size:14px}
.mksm-concept-rule .mksm-concept-math{color:var(--mksm-concept-blue);font-size:18px;font-weight:700}
.mksm-concept-rule p{margin:5px 0 0;color:var(--mksm-concept-muted);font-size:14px}
.mksm-concept-note{margin:16px 0;padding:14px 16px;border:1px solid #b9d2f7;border-left:5px solid var(--mksm-concept-blue);border-radius:6px;background:var(--mksm-concept-blue-soft)}
.mksm-concept-note.is-remark{border-color:#f0d49c;border-left-color:var(--mksm-concept-amber);background:var(--mksm-concept-amber-soft)}
.mksm-concept-note.is-logic{border-color:#b8ddc7;border-left-color:var(--mksm-concept-green);background:var(--mksm-concept-green-soft)}
.mksm-concept-note strong{display:block;margin-bottom:3px;color:var(--mksm-concept-ink)}
.mksm-concept-example{margin:18px 0;padding:18px;border:1px solid var(--mksm-concept-border);border-radius:6px;background:#fff}
.mksm-concept-example>h3{margin:0 0 10px}
.mksm-concept-example .answer{margin-top:12px;padding-top:10px;border-top:1px solid var(--mksm-concept-border);color:var(--mksm-concept-green);font-weight:800}
.mksm-concept-table-wrap{max-width:100%;margin:16px 0;overflow-x:auto;border:1px solid var(--mksm-concept-border);border-radius:6px}
.mksm-concept-table{width:100%;min-width:620px;border-collapse:collapse;background:#fff;font-size:14px}
.mksm-concept-table th,.mksm-concept-table td{padding:10px 12px;border-right:1px solid var(--mksm-concept-border);border-bottom:1px solid var(--mksm-concept-border);text-align:left;vertical-align:top}
.mksm-concept-table th{background:var(--mksm-concept-soft);color:#263247;font-weight:800}
.mksm-concept-table tr:last-child td{border-bottom:0}
.mksm-concept-table th:last-child,.mksm-concept-table td:last-child{border-right:0}
.mksm-concept-figure{width:min(100%,760px);margin:18px auto 22px;padding:10px;border:1px solid var(--mksm-concept-border);border-radius:6px;background:#fff;text-align:center}
.mksm-concept-figure img{display:block;width:100%;max-width:100%;max-height:390px;height:auto;margin:0 auto;object-fit:contain}
.mksm-concept-figure figcaption{margin:8px 4px 0;color:var(--mksm-concept-muted);font-size:13px}
.mksm-concept-check{margin:16px 0;border:1px solid #b8ddc7;border-radius:6px;background:var(--mksm-concept-green-soft)}
.mksm-concept-check summary{padding:12px 14px;color:#115c36;font-weight:800;cursor:pointer}
.mksm-concept-check summary:hover,.mksm-concept-check summary:focus{background:#dff5e7;color:#0c4729}
.mksm-concept-check>div{padding:0 14px 14px;color:var(--mksm-concept-ink)}
.mksm-concept-formula-sheet{padding:34px 0;border-bottom:1px solid var(--mksm-concept-border)}
.mksm-concept-formula-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
.mksm-concept-formula{min-width:0;padding:15px;border:1px solid var(--mksm-concept-border);border-radius:6px;background:#fff}
.mksm-concept-formula>strong{display:block;margin-bottom:7px;color:#263247;font-size:14px}
.mksm-concept-formula .mksm-concept-math{color:var(--mksm-concept-blue);font-size:18px;font-weight:700;overflow-x:auto}
.mksm-concept-formula p{margin:7px 0 0;color:var(--mksm-concept-muted);font-size:13px}
.mksm-concept-closing{margin:26px 0 0;padding:16px 18px;border-left:5px solid var(--mksm-concept-green);background:var(--mksm-concept-green-soft);color:var(--mksm-concept-ink)}
.mksm-concept-closing p{margin:0}
.mksm-concept mjx-container,.mksm-concept .katex-display{max-width:100%;overflow-x:auto;overflow-y:hidden}
@media(max-width:900px){
  .mksm-concept-formula-row,.mksm-concept-formula-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:680px){
  .mksm-concept{padding:12px 10px 48px}
  .mksm-concept-header{align-items:flex-start;flex-direction:column;gap:14px}
  .mksm-concept-header h1{font-size:25px}
  .mksm-concept-overview{font-size:16px}
  .mksm-concept-outcomes ul,.mksm-concept-list,.mksm-concept-formula-row,.mksm-concept-formula-grid{grid-template-columns:minmax(0,1fr)}
  .mksm-concept-section{padding:27px 0}
  .mksm-concept-section-head h2,.mksm-concept-formula-sheet h2{font-size:22px}
  .mksm-concept-section-summary{font-size:15px}
  .mksm-concept-body{font-size:15px}
  .mksm-concept-example{padding:15px}
  .mksm-concept-figure{padding:6px}
  .mksm-concept-figure img{max-height:300px}
}