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/* Cztery tematy korzystają z tego samego układu; dłuższe wzory mają więcej miejsca. */
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.notebook[data-topic] .notebook-math .math{font-size:1em}
.notebook[data-topic]:not([data-topic="potegi"]) .notebook-label{white-space:normal;display:block;line-height:1.4}
.chapter{font-size:14px}.topic{font-size:14px}.chapter-tag{display:none}.chapter-number,.course-total,.topic.active:after{font-size:12px}.topic.active:after{content:'•';background:none;padding:0}.eyebrow{font-size:12px;letter-spacing:1.2px}.type-card .type-label{font-size:12px;letter-spacing:0}.type-card h3{font-size:17px}.type-card p{font-size:14px}.type-card .math-line{font-size:21px;overflow-wrap:anywhere}.type-card p .math{font-size:17px}
.section-intro,.test-intro,.question-prompt{font-size:16px}.table-caption,.advice p,.extra-theory,.feedback,.source-link,.back-theory{font-size:14px}.rules-table{font-size:15px}.rules-table th,.rules-table td:first-child small{font-size:12px}.advice h3{font-size:16px}.primary,.lesson-link,.progress-card strong,.text-button{font-size:14px}.progress-card span,.question-points,.submit-card p,.result p,.result small,.lesson-meta,.breadcrumb,.pill{font-size:12px}.question-label,.letter{font-size:13px}.question-prompt{line-height:2.1}.type-card .math-line{min-width:0}.types-grid{align-items:stretch}.result-links{flex-wrap:wrap}
@media(max-width:1100px){h1{font-size:51px}.types-grid{grid-template-columns:1fr}.type-card{display:block}.type-card .math-line{margin:12px 0}.notebook{width:175px}}
@media(max-width:760px){.welcome{flex-wrap:wrap}.welcome>div:first-child{flex:1;min-width:180px}.notebook{width:145px}.notebook[data-topic]:not([data-topic="potegi"]) .notebook-math{font-size:23px}.types-grid{grid-template-columns:1fr}.type-card{display:block}.rules-table{min-width:0}.rules-table thead{display:none}.rules-table,.rules-table tbody,.rules-table tr,.rules-table td{display:block;width:100%}.rules-table tr{padding:13px 15px;border-bottom:1px solid var(--line)}.rules-table tr:last-child{border-bottom:0}.rules-table td{border:0;padding:6px 0}.rules-table td:nth-child(3)::before{content:'Przykład: ';display:block;font:12px/1.6 "Segoe UI",sans-serif;color:var(--muted);margin-bottom:4px}.rules-table .math{font-size:18px}.theory-actions{flex-wrap:wrap}.nav-hint{display:none}.question.long-answers .answers{grid-template-columns:1fr}.answer-value{overflow-wrap:anywhere}.primary{white-space:normal}.theory-actions .primary,.source-link,.back-theory{font-size:14px}.advice-examples{gap:12px}.extra-theory p,.feedback p{overflow-wrap:anywhere}.feedback .math{font-size:17px}.top-note{font-size:12px}.lesson-meta{max-width:none}.type-card p{font-size:14px}.welcome .eyebrow{font-size:12px}.table-heading{line-height:1.4}}
@media(max-width:450px){h1{font-size:42px;letter-spacing:-2px}.welcome .notebook{display:none}.question{padding:18px 14px}.answers{grid-template-columns:1fr}.type-card .math-line{font-size:19px}.type-card .math-line .math{font-size:1em}.lesson-meta{font-size:12px}.breadcrumb{font-size:12px;flex-wrap:wrap}.top-note{display:none}.section-head{flex-wrap:wrap}.result-score{font-size:51px}.rule-table .math{font-size:17px}}
.home-welcome{display:grid;grid-template-columns:1.15fr .95fr;align-items:center;gap:32px;padding:25px 0 40px}.home-copy h1{font-size:42px;line-height:1.13;letter-spacing:-1.8px;margin:0 0 25px}.home-copy h1>span{color:var(--green)}.home-copy .eyebrow{font-size:12px;letter-spacing:1.3px}.commandments{margin:0 0 24px}.commandments h2{font-size:13px;letter-spacing:1.2px;line-height:1.5;margin-bottom:14px}.commandments ol{list-style:none;margin:0;padding:0}.commandments li{display:flex;gap:12px;align-items:baseline;padding:9px 0;font-size:16px;line-height:1.55}.commandments li span{color:#84916d;font-size:12px;flex-shrink:0;font-weight:700}.einstein{margin:0;min-width:0}.einstein img{display:block;width:100%;height:auto;border-radius:22px}.einstein figcaption{text-align:center;color:var(--muted);font-size:12px;margin-top:12px}.home-topics-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:23px}.home-topic-card{display:flex;flex-direction:column;position:relative;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:15px;padding:23px;color:var(--ink);transition:border-color .15s,transform .15s}.home-topic-card:hover{border-color:var(--green);transform:translateY(-2px)}.home-topic-number{font-size:12px;color:#7b8e6d;letter-spacing:1px;margin-bottom:12px}.home-topic-card h3{font-size:23px;letter-spacing:-.5px;margin-bottom:9px}.home-topic-card p{font-size:14px;color:var(--muted);margin-bottom:22px}.home-topic-meta{font-size:12px;color:var(--green);margin-top:auto;display:flex;justify-content:space-between}.home-topic-meta>span{font-size:20px;line-height:1}.set-picker{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:18px}.set-picker label{font-size:14px;font-weight:600}.set-picker select{font:inherit;font-size:14px;max-width:100%;border:1px solid #bacbb7;border-radius:8px;background:#fff;color:var(--ink);padding:10px 34px 10px 12px;min-height:44px}.set-picker select:focus-visible{outline:3px solid #c28818;outline-offset:3px}#single-set{font-size:13px;border:1px solid var(--line);border-radius:20px;padding:5px 12px;color:var(--green);background:#edf2e8}.notebook[data-topic="potegi"] .notebook-math{font-size:48px}.notebook[data-topic="potegi"] .notebook-caption{font-size:12px}.notebook[data-topic="potegi"] .notebook-math sup{font-size:28px}
@media(max-width:1150px){.home-welcome{grid-template-columns:1fr .8fr;gap:20px}.home-copy h1{font-size:35px}.commandments li{font-size:15px}.notebook[data-topic="potegi"] .notebook-math{font-size:36px}.notebook[data-topic="potegi"] .notebook-math sup{font-size:22px}.notebook[data-topic="potegi"] .notebook-math>span{font-size:25px}.notebook[data-topic="potegi"] .notebook-caption{font-size:11px}}
@media(max-width:950px){.home-welcome{grid-template-columns:1fr}.home-copy h1{max-width:570px}.einstein{max-width:270px;justify-self:center}.home-topic-card{padding:18px}.home-topic-card h3{font-size:21px}.home-topics-grid{gap:12px}}
@media(max-width:760px){.home-welcome{padding-top:0;gap:25px}.home-copy h1{font-size:35px}.home-copy .primary{width:100%}.einstein{max-width:235px}.home-topic-card p{font-size:14px}.home-topics-grid{grid-template-columns:1fr}.commandments li{font-size:16px}}
@media(prefers-reduced-motion:reduce){.home-topic-card{transition:none}}
/* Działy 2 i 3: kroki rozwiązań i laboratoria wykresów. */
.chapter-link{text-decoration:none;margin:5px 0}.chapter-link:hover{background:var(--mint)}
.function-basics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:25px 0}.function-basics article{padding:20px;background:#f1f5ef;border:1px solid var(--line);border-radius:12px}.function-basics h3{margin-bottom:12px}.function-basics p{font-size:15px}.function-basics .step-formula{font-size:20px;margin:14px 0}
.type-switch{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.type-switch button,.walk-controls button{font:inherit;font-size:14px;padding:10px 15px;border:1px solid #bacbbb;background:white;color:var(--green);min-height:44px}.type-switch button[aria-pressed=true]{background:var(--green);color:white;border-color:var(--green)}.type-switch button:hover{border-color:var(--green);box-shadow:0 0 0 1px var(--green)}
.walk-hint{font-size:18px;margin:20px 0;color:var(--green);font-weight:600}.walk-step{display:flex;gap:15px;background:#f5f7f2;border:1px solid var(--line);border-radius:12px;padding:20px;margin:12px 0;animation:step-enter .2s ease-out}.walk-step>div{min-width:0}.walk-step h3{font-size:17px}.walk-step p:not(.step-formula){font-size:15px;color:var(--muted)}.step-formula{font-family:Cambria,"Segoe UI",serif;font-size:23px;line-height:1.65;margin:12px 0;overflow-wrap:anywhere}.walk-controls{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin:20px 0}.walk-controls span{font-size:13px;color:var(--muted)}.walk-controls button:disabled{opacity:.45}
.graph-lab{margin:32px 0;padding:24px;border:1px solid var(--line);border-radius:16px;background:#fbfcf9}.graph-lab h3{font-size:23px;margin-bottom:14px}.graph-lab>p{font-size:15px}.coordinate-graph{display:block;width:100%;max-width:660px;height:auto;margin:18px auto;font-family:"Segoe UI",sans-serif;font-size:12px;overflow:visible}.question-visual{margin:10px 0 25px;max-width:660px}.question-visual figcaption,.graph-caption{font-size:13px;color:var(--muted);line-height:1.6}.question-visual .coordinate-graph{margin:10px auto}.lab-note{background:#eaf1e7;border-left:4px solid var(--green);padding:16px 18px;border-radius:0 10px 10px 0;margin:18px 0;line-height:1.7;font-size:16px}.lab-note .step-formula{margin:0 0 8px}.shift-controls{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:25px}.shift-controls label{display:block;font-size:15px;font-weight:600}.shift-controls input{display:block;width:100%;min-height:44px;accent-color:var(--green)}.shift-controls output{font-variant-numeric:tabular-nums;color:var(--green)}.values-table{border-collapse:collapse;margin:20px auto;max-width:100%;font-size:18px}.values-table td,.values-table th{border:1px solid #bacbbb;padding:9px 15px;text-align:center}.values-table th{background:var(--mint)}.values-table caption{font:14px/1.5 "Segoe UI",sans-serif;color:var(--muted);margin-bottom:10px}.test-source{margin:8px 0 20px}.formula-text{font-family:Cambria,serif;font-size:1.15em}.welcome>div:first-child{min-width:0}.welcome h1{overflow-wrap:anywhere;font-size:clamp(32px,4vw,58px)}
@keyframes step-enter{from{opacity:.3;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1100px){.function-basics{grid-template-columns:1fr}.welcome .notebook[data-topic=rownania],.welcome .notebook[data-topic=funkcje]{display:none}}
@media(max-width:760px){.graph-lab{padding:14px}.shift-controls{grid-template-columns:1fr;gap:10px}.walk-step{padding:14px;gap:10px}.walk-controls{justify-content:flex-start}.walk-controls span{order:-1;width:100%}.step-formula{font-size:20px}.values-table td,.values-table th{padding:8px}.type-switch button{flex:1 1 130px}.graph-lab h3{font-size:21px}.coordinate-graph{min-width:0}.question-visual{margin-left:0;margin-right:0}}
@media(prefers-reduced-motion:reduce){.walk-step{animation:none}}
.equation-line{display:block;margin:16px 0}.step-formula .math{font-size:1.05em}.answer-value .math,.question-prompt .math{vertical-align:middle}.step-formula{overflow-x:auto;padding-bottom:4px}.extra-theory .math{vertical-align:middle}.walk-step .equation-line{line-height:2.2}

/* V6: czytelny skład wzorów i nowe pracownie. */
.math{font-family:"Cambria Math",Cambria,serif;math-style:normal;vertical-align:-.15em}
.math mfrac{padding:0 .12em}.math mo{font-family:"Cambria Math",Cambria,serif}
.formula-block{font-family:"Cambria Math",Cambria,serif;font-size:23px;line-height:1.8;margin:18px 0;overflow-x:auto;padding:4px 0}.formula-block .math{font-size:1em}
.v6-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:24px 0}.v6-card{background:#f1f5ef;border:1px solid var(--line);border-radius:12px;padding:22px;margin:16px 0}.v6-cards .v6-card{margin:0}.v6-card h3{margin-bottom:12px}.v6-card p+p{margin-top:14px}
.graph-options{display:grid;grid-template-columns:1fr 1fr;gap:12px}.graph-options figure{margin:0}.graph-options figcaption{font-weight:700;font-size:16px}.statement-list{font-size:17px;line-height:1.65;padding-left:24px;margin:12px 0}.statement-list li+li{margin-top:8px}
.sequence-values{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}.sequence-values>div{flex:1;min-width:65px;background:#eaf1e7;border-radius:12px;padding:12px;text-align:center}.sequence-values small,.sequence-values strong{display:block}.sequence-values strong{font-size:25px;color:var(--green)}
.shift-controls select{display:block;padding:8px;width:100%;border:1px solid var(--line);border-radius:6px;background:white;min-height:44px;font:inherit}
@media(max-width:600px){.formula-block{font-size:20px}.v6-card{padding:16px}.graph-options{grid-template-columns:1fr}.statement-list{font-size:16px}}