:root{--navy:#102f3b;--deep:#082a36;--ink:#173340;--muted:#657983;--mint:#b2eddb;--green:#126656;--line:#dfE7e9;--surface:#f4f7f8;--white:#fff;--orange:#f0b570;--radius:16px;font-family:Inter,"Avenir Next",Avenir,system-ui,-apple-system,sans-serif;color:var(--ink);font-size:16px;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:var(--surface);line-height:1.6}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select,summary{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #198976;outline-offset:4px}button{color:inherit}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.2;letter-spacing:-.035em}h1{font-size:2.5rem;font-weight:650}h2{font-size:1.65rem;font-weight:650}h3{font-size:1.15rem;font-weight:650}small{font-size:.8rem}svg{display:block;max-width:100%}.skip{position:fixed;top:-100px;left:10px;background:white;padding:15px;z-index:99}.skip:focus{top:8px}.sidebar{position:fixed;width:248px;inset:0 auto 0 0;background:var(--deep);color:#fff;padding:36px 23px 22px;display:flex;flex-direction:column;z-index:30}.brand{display:flex;align-items:center;gap:12px;font-size:.8rem;letter-spacing:.07em;font-weight:750;line-height:1.3}.brand small{display:block;font-size:.75rem;font-weight:450;letter-spacing:.18em;margin-top:4px}.brand-mark{display:grid;place-items:center;width:39px;height:45px;font-size:1.9rem;color:var(--mint);filter:grayscale(1) brightness(3)}.school-label{font-size:.75rem;letter-spacing:.19em;color:#9bb5bf;margin:38px 13px 17px}.primary-nav{display:grid;gap:7px}.primary-nav a{display:flex;align-items:center;gap:12px;font-size:.9rem;color:#bbd0d7;padding:12px 14px;border-radius:7px;transition:background .2s}.primary-nav a span{font-size:1.25rem;width:21px;text-align:center}.primary-nav a:hover{background:#173e49}.primary-nav a.active{background:#244b55;color:white}.sidebar-heading{border-top:1px solid #32515c;margin:35px 12px 17px;padding-top:25px;display:flex;justify-content:space-between;font-size:.7rem;letter-spacing:.12em;color:#94b3be}.sidebar-heading span{color:#e6f1f3}.course-active{display:flex;align-items:center;gap:13px;padding:10px 12px;font-size:.93rem;line-height:1.5}.course-number{border:1px solid #6b929b;border-radius:6px;padding:5px 12px;color:var(--mint)}.side-progress{margin:26px 12px;color:#b9cdd4;font-size:.75rem}.side-progress>div{display:flex;justify-content:space-between;margin-bottom:10px}.side-progress strong{color:var(--mint)}progress{width:100%;height:5px;display:block;appearance:none;border:0;border-radius:8px;overflow:hidden;background:#355360}progress::-webkit-progress-bar{background:#355360}progress::-webkit-progress-value{background:var(--mint);border-radius:8px}progress::-moz-progress-bar{background:var(--mint)}.side-progress small{display:block;margin-top:10px}.sidebar-bottom{margin-top:auto;padding:35px 12px 0;color:#b5cbd1}.sidebar-bottom .compass{font-size:2.4rem;color:var(--mint)}.sidebar-bottom p{font-size:.8rem;line-height:1.7}.sidebar-bottom strong{font-weight:400;color:#e2edef}.sidebar-bottom small{font-size:.75rem;display:block;margin-top:25px;color:#8facb6}.page-shell{margin-left:248px}.topbar{height:82px;background:#fff;border-bottom:1px solid var(--line);padding:0 40px;display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:.85rem}.topbar-left,.topbar-right{display:flex;align-items:center;gap:12px}.slash{color:#b5c4ca;padding:0 13px}#breadcrumb{color:#657983}.draft-badge{font-size:.75rem;background:#f2f5f6;border:1px solid #e5ebed;padding:4px 9px;border-radius:5px;margin-right:13px;color:#637780}.avatar{height:32px;width:32px;display:grid;place-items:center;border-radius:50%;background:#e9f1ed;color:#326654;font-size:.8rem;font-weight:650}.menu-button{display:none;border:0;background:none;font-size:1.4rem}main{padding:34px 40px 42px;max-width:1640px;margin:auto;min-height:calc(100vh - 160px)}.eyebrow{font-size:.75rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;display:block;color:var(--green);margin-bottom:10px}.welcome{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:27px}.welcome p{color:var(--muted);margin-top:8px;font-size:.94rem}.daily-chip{font-size:.8rem;color:#43605a;display:flex;align-items:center;gap:8px}.daily-chip span{font-size:1.2rem}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:22px}.hero{position:relative;border-radius:var(--radius);overflow:hidden;background:#123d49;min-height:326px;color:white;display:flex;align-items:center}.hero-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:65% center}.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(4,31,43,.95),rgba(4,31,43,.68) 48%,rgba(4,31,43,.04))}.hero-content{position:relative;z-index:1;padding:32px;max-width:500px}.hero .eyebrow{color:var(--mint);font-size:.75rem;letter-spacing:.18em}.hero h2{font-size:2.6rem;line-height:1.12;letter-spacing:-.04em;margin:14px 0}.hero p{color:#d9e6e9;max-width:305px;font-size:.9rem}.hero-meta{display:flex;gap:16px;font-size:.75rem;color:#d6e4e9;margin:17px 0 22px}.button{border:0;border-radius:7px;background:var(--navy);color:white;font-weight:600;font-size:.86rem;padding:12px 17px;display:inline-flex;gap:10px;align-items:center;justify-content:center;min-height:44px;transition:transform .2s,background .2s}.button:hover{background:#1d4b5b;transform:translateY(-1px)}.button.mint{background:var(--mint);color:#103f37}.button.mint:hover{background:#caf8e9}.button.outline{background:transparent;border:1px solid var(--line);color:var(--ink)}.button.ghost{background:transparent;color:inherit;padding-left:0;padding-right:0}.hero-actions{display:flex;gap:17px;align-items:center;flex-wrap:wrap}.hero .button.ghost{font-size:.8rem;color:#fff}.daily-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column}.daily-card .eyebrow{color:var(--muted);font-size:.75rem}.daily-card h3{font-size:1.25rem;margin:5px 0 16px}.daily-plan{list-style:none;padding:0;margin:0;display:grid;gap:17px}.daily-plan li{display:flex;gap:11px;font-size:.8rem;align-items:flex-start}.step-dot{border:1px solid #d6e7e1;display:grid;place-items:center;min-width:26px;height:26px;border-radius:50%;font-size:.7rem;color:var(--green);background:#f2f9f6}.daily-plan strong{display:block;font-size:.84rem;font-weight:550}.daily-plan small{color:var(--muted);font-size:.75rem}.daily-card-bottom{margin-top:auto;padding-top:18px;font-size:.75rem;color:var(--muted);border-top:1px solid var(--line)}.section-header{display:flex;justify-content:space-between;align-items:center;margin:33px 0 20px;gap:16px}.section-header h2{font-size:1.3rem}.section-header p{font-size:.8rem;color:var(--muted)}.episode-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.episode-card{display:block;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:white;transition:transform .2s,box-shadow .2s}.episode-card:hover{transform:translateY(-3px);box-shadow:0 10px 22px #113f4810}.episode-art{height:126px;position:relative;overflow:hidden;background:#e4edf0;padding:13px 12px}.episode-art svg{height:100%;width:100%;opacity:.9}.episode-art:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#ecf2f430,transparent);pointer-events:none}.ep-index{position:absolute;left:15px;top:12px;font-size:.75rem;letter-spacing:.12em;font-weight:700;color:#52727b;z-index:1}.ep-time{position:absolute;bottom:10px;right:12px;font-size:.75rem;padding:2px 7px;border-radius:4px;background:#fffE;color:#36555f}.episode-info{padding:16px 18px 18px}.episode-info .kicker{font-size:.75rem;letter-spacing:.09em;color:var(--muted);margin-bottom:7px;display:block}.episode-info h3{font-size:1rem;margin-bottom:6px}.episode-info p{font-size:.78rem;color:var(--muted);line-height:1.5;min-height:38px}.episode-card-bottom{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #edf1f2;margin-top:15px;padding-top:12px;font-size:.75rem;color:#53747b}.episode-card-bottom .arrow{font-size:1.1rem}.ep-complete{color:var(--green);font-weight:600}.review-band{margin-top:25px;padding:21px 25px;display:flex;gap:22px;justify-content:space-between;align-items:center;background:#e7f1ed;border:1px solid #d7e6df;border-radius:12px}.review-band p{font-size:.82rem;color:#55766e;margin-top:5px}.review-band h3{font-size:1rem}.site-footer{display:flex;gap:20px;justify-content:space-between;padding:20px 40px;color:#6b8089;font-size:.75rem;border-top:1px solid var(--line)}.back-link{display:inline-flex;gap:8px;align-items:center;font-size:.82rem;color:#637d86;margin-bottom:23px}.lesson-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:22px;margin-bottom:26px}.lesson-heading h1{font-size:2.4rem}.lesson-heading p{max-width:740px;color:var(--muted);margin-top:11px}.lesson-time{white-space:nowrap;font-size:.78rem;color:var(--muted)}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 242px;gap:24px;align-items:start}.lesson-body{min-width:0}.lesson-nav{position:sticky;top:25px;border:1px solid var(--line);background:white;border-radius:12px;padding:21px}.lesson-nav h3{font-size:.9rem;margin-bottom:17px}.lesson-nav a{display:flex;gap:11px;padding:10px 0;color:#697e86;font-size:.8rem;border-bottom:1px solid #f1f4f5}.lesson-nav a.active{color:var(--green);font-weight:650}.lesson-nav a span{font-size:.7rem;min-width:19px}.lesson-nav p{font-size:.75rem;color:var(--muted);margin-top:20px}.concept-block,.interactive,.quiz-card,.metric-card{background:#fff;border:1px solid var(--line);border-radius:13px;padding:27px;margin-bottom:22px}.concept-block h2{font-size:1.35rem;margin-bottom:14px}.concept-block>p{color:#506c77;margin-bottom:20px}.term-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px 25px}.term{border-top:1px solid #e7edef;padding-top:14px}.term h3{font-size:.96rem;margin-bottom:6px}.term p{font-size:.88rem;color:#536e78;line-height:1.65}.memory{border-left:3px solid #69b89c;background:#eff7f3;border-radius:0 7px 7px 0;padding:16px 19px;font-size:.87rem;color:#3b6357;margin-top:23px}.memory strong{display:block;font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;margin-bottom:4px}.interactive{background:#e9f1f3;padding:23px}.interactive h2{font-size:1.12rem}.interactive>p{color:#5d7882;font-size:.82rem;margin:7px 0 16px}.diagram{max-width:600px;margin:15px auto}.diagram svg{width:100%;height:auto}.diagram svg text{font-family:inherit}.diagram-controls{display:flex;gap:9px;flex-wrap:wrap;justify-content:center}.pill{border:1px solid #bdd2d5;background:#fff;border-radius:6px;padding:8px 14px;font-size:.81rem}.pill.active{background:var(--navy);color:white;border-color:var(--navy)}.diagram-feedback{margin-top:16px;border-radius:8px;background:#fff9;padding:14px 17px;font-size:.9rem;min-height:75px}.diagram-feedback strong{display:block;color:#175e51;margin-bottom:3px}.range-row{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:15px;font-size:.8rem;margin-top:14px}.range-row input{width:100%;accent-color:var(--green)}.quiz-card{border-color:#bcd5ca}.quiz-card .eyebrow{margin-bottom:8px}.quiz-intro{font-size:.9rem;color:var(--muted);margin-top:9px}.quiz-question{margin-top:24px}.quiz-question>p{font-weight:550;margin-bottom:12px}.quiz-options{display:grid;gap:9px}.quiz-option{border:1px solid var(--line);border-radius:7px;display:flex;gap:12px;align-items:center;padding:12px 15px;cursor:pointer;font-size:.88rem}.quiz-option:hover{background:#f6faf8}.quiz-option input{accent-color:var(--green);width:17px;height:17px;flex-shrink:0}.quiz-option.correct{background:#eaf6ee;border-color:#98c8a8}.quiz-option.wrong{background:#fff2ee;border-color:#dfb7a7}.quiz-explanation{padding:11px 14px;font-size:.83rem;color:#45665b;background:#eff6f2;margin-top:9px;border-radius:7px}.quiz-result{margin-top:20px;padding:16px;border-radius:8px;background:#eaf3ee;font-size:.9rem}.quiz-result h3{font-size:1.05rem;margin-bottom:5px}.quiz-actions{margin-top:23px;display:flex;gap:13px;align-items:center;flex-wrap:wrap}.lesson-bottom{display:flex;justify-content:space-between;margin-top:25px;gap:15px}.checkbox-label{font-size:.85rem;display:flex;gap:9px;align-items:flex-start;margin-top:20px}.checkbox-label input{accent-color:var(--green);margin-top:5px}.glossary-tools{margin:25px 0;display:flex;gap:12px;align-items:center}.search{background:white;border:1px solid #cfdbdf;padding:13px 16px;border-radius:8px;max-width:480px;width:100%}.term-count{font-size:.8rem;color:var(--muted)}.glossary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.glossary-card{background:white;border:1px solid var(--line);border-radius:10px;padding:22px}.glossary-card .eyebrow{font-size:.75rem}.glossary-card h3{margin-bottom:10px}.glossary-card p{font-size:.86rem;color:#56717b}.glossary-card a{display:inline-block;margin-top:16px;font-size:.77rem;color:var(--green);font-weight:600}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:19px;margin:25px 0}.metric-card{margin:0;padding:23px}.metric-card strong{display:block;font-size:2rem;font-weight:600}.metric-card span{font-size:.85rem;color:var(--muted)}.progress-list{background:#fff;padding:8px 24px;border:1px solid var(--line);border-radius:12px}.progress-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line)}.progress-row:last-child{border-bottom:0}.progress-row h3{font-size:.98rem}.progress-row p{font-size:.8rem;color:var(--muted);margin-top:5px}.tag{padding:5px 10px;background:#eff3f4;border-radius:5px;font-size:.75rem;white-space:nowrap}.tag.done{background:#e9f5ef;color:var(--green)}.small-note{font-size:.82rem;color:var(--muted);margin-top:20px}.challenge-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:25px}.challenge-tile{background:white;border:1px solid var(--line);border-radius:12px;padding:27px}.challenge-tile .symbol{font-size:2.2rem;color:var(--green);margin-bottom:18px}.challenge-tile h2{font-size:1.35rem;margin-bottom:10px}.challenge-tile p{font-size:.9rem;color:var(--muted);margin-bottom:22px}.flashcard{background:#102f3b;color:white;padding:50px 30px;min-height:260px;border-radius:14px;display:grid;place-items:center;text-align:center;cursor:pointer;width:100%;border:0}.flashcard h2{font-size:2rem}.flashcard p{max-width:600px;font-size:1rem;color:#d0e5e5;line-height:1.8}.flashcard small{color:var(--mint);font-size:.8rem}.flash-navigation{display:flex;justify-content:space-between;align-items:center;margin:20px 0}.flash-navigation span{font-size:.85rem;color:var(--muted)}.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:18px}.calc-grid label{font-size:.82rem}.calc-grid input{width:100%;padding:10px;margin-top:7px;border-radius:6px;border:1px solid #bdd1d7}.calc-result{padding:18px;background:#fff;margin-top:17px;border-radius:8px;font-size:.9rem}.calc-result strong{font-size:1.2rem}.data-table{width:100%;border-collapse:collapse;font-size:.78rem;margin:15px 0}.data-table th,.data-table td{text-align:left;padding:9px;border-bottom:1px solid var(--line)}.data-table th{font-weight:600;background:#f4f8f7}.table-wrap{overflow:auto}.source-link{font-size:.77rem;color:var(--green);text-decoration:underline}.game-score{display:flex;justify-content:space-between;font-size:.82rem;color:var(--muted);margin:20px 0}.game-prompt{font-size:1.5rem!important;text-align:center;margin:20px 0}.empty{padding:50px;background:white;border:1px solid var(--line);border-radius:12px;text-align:center;color:var(--muted)}dialog{border:0;border-radius:17px;padding:25px;max-width:900px;width:calc(100% - 32px);color:var(--ink);box-shadow:0 20px 90px #0005}dialog::backdrop{background:#001e2cc9;backdrop-filter:blur(6px)}.dialog-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:19px;gap:20px}.dialog-top h2{font-size:1.5rem}.icon-button{border:1px solid var(--line);background:#fff;border-radius:50%;width:37px;height:37px}.dialog-top .eyebrow{font-size:.75rem}.video-note,dialog details{font-size:.83rem;color:var(--muted);margin-top:13px}dialog details p{margin-top:12px}video{width:100%;max-height:65vh;background:#0b2c38;border-radius:9px;display:block}summary{cursor:pointer}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:13px 22px;border-radius:9px;background:var(--navy);color:white;font-size:.87rem;z-index:70;box-shadow:0 8px 30px #001c3330;max-width:90vw}.rotation{transform-origin:300px 180px;animation:spin 9s linear infinite}.windflow{stroke-dasharray:8 7;animation:flow 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes flow{to{stroke-dashoffset:-30}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}@media(min-width:1550px){.hero{min-height:370px}.hero h2{font-size:3rem}.episode-art{height:155px}}@media(max-width:1250px){.sidebar{width:220px;padding-left:17px;padding-right:17px}.page-shell{margin-left:220px}main{padding:28px}.topbar{padding:0 28px}.hero-grid{grid-template-columns:minmax(0,1fr) 220px;gap:17px}.hero-content{padding:25px}.daily-card{padding:20px}.hero h2{font-size:2.3rem}.episode-grid{gap:14px}.lesson-layout{grid-template-columns:minmax(0,1fr) 215px;gap:18px}.lesson-nav{padding:17px}.site-footer{padding:20px 28px}.term-grid{gap:17px}}@media(max-width:1050px){.hero-grid{grid-template-columns:1fr}.daily-card{display:none}.episode-grid{grid-template-columns:repeat(2,1fr)}.lesson-layout{display:block}.lesson-nav{position:static;margin-top:25px}.lesson-nav a{display:inline-flex;margin-right:16px}.lesson-nav p{display:none}.glossary-grid{grid-template-columns:repeat(2,1fr)}.view-label{display:none}.topbar{padding:0 23px}h1{font-size:2.2rem}.daily-chip{display:none}}@media(max-width:760px){.sidebar{transform:translateX(-100%);transition:transform .25s;box-shadow:20px 0 50px #092c3933}.sidebar.open{transform:translateX(0)}.page-shell{margin:0}.menu-button{display:block}.topbar{height:68px;padding:0 18px;font-size:.76rem}.topbar-left,.topbar-right{gap:9px}.topbar .slash{padding:0 7px}.draft-badge{font-size:.75rem;margin-right:0;padding:4px 6px}.avatar{display:none}main{padding:25px 19px}.welcome{margin-bottom:22px}.welcome h1{font-size:1.8rem}.welcome p{font-size:.85rem}.hero{min-height:315px}.hero-content{padding:25px}.hero h2{font-size:2.3rem}.hero p{max-width:240px}.hero-image{object-position:60% center}.hero:after{background:linear-gradient(90deg,#041f2bf2,#041f2b80 70%,#041f2b20)}.hero-actions{gap:12px}.hero .button.ghost{font-size:.75rem}.section-header{align-items:flex-start;margin-top:28px}.section-header h2{font-size:1.2rem}.section-header p{font-size:.7rem}.episode-grid{gap:13px}.episode-art{height:110px}.episode-info{padding:14px}.episode-info h3{font-size:.93rem}.episode-info p{font-size:.75rem}.episode-card-bottom{font-size:.75rem}.review-band{padding:20px;flex-direction:column;align-items:flex-start;gap:15px}.site-footer{padding:20px;flex-direction:column;gap:5px}.lesson-heading{display:block}.lesson-heading h1{font-size:2rem}.lesson-time{display:block;margin-top:12px}.lesson-heading p{font-size:.92rem}.term-grid{grid-template-columns:1fr}.concept-block,.interactive,.quiz-card{padding:21px}.lesson-bottom{flex-wrap:wrap}.challenge-grid{grid-template-columns:1fr}.metrics{gap:9px}.metric-card{padding:17px 12px}.metric-card strong{font-size:1.6rem}.metric-card span{font-size:.7rem}.glossary-grid{gap:12px}.glossary-card{padding:17px}.glossary-card h3{font-size:1rem}.glossary-card p{font-size:.82rem}.glossary-tools{display:block}.term-count{display:block;margin-top:10px}.flashcard{padding:35px 22px}.flashcard h2{font-size:1.6rem}.lesson-nav a{display:flex}.calc-grid{gap:12px}.progress-list{padding:0 18px}.progress-row{gap:10px}.progress-row h3{font-size:.88rem}.progress-row .tag{font-size:.75rem;white-space:normal}.dialog-top h2{font-size:1.25rem}dialog{padding:18px}}@media(max-width:390px){.episode-grid,.glossary-grid{grid-template-columns:1fr}.episode-art{height:155px}.hero-actions{align-items:flex-start;flex-direction:column}.topbar-right{display:none}.metrics{grid-template-columns:1fr}.metric-card{display:flex;gap:15px;align-items:center}.term-grid{display:block}.term{margin-bottom:16px}}

.episode-art text{display:none}.quiz-question legend{font-weight:600;margin-bottom:13px;font-size:.96rem}.lesson-nav a,.primary-nav a{font-size:.875rem}.episode-info p,.glossary-card p,.daily-plan strong,.search{font-size:.875rem}.lesson-nav p,.small-note{font-size:.875rem}

/* Topic navigation and visual learning */
[hidden]{display:none!important}.sidebar{overflow-y:auto}.course-active{border-radius:8px;margin-bottom:7px}.selected-course{background:#204650}.course-active:not(.selected-course){color:#acc3cc}.sidebar-heading{margin-top:25px}.side-progress{margin-top:18px}.sidebar-bottom{padding-top:22px}.sidebar-bottom small{margin-top:10px}.term p{font-size:1rem}.term h3{font-size:1rem}.concept-trigger{border:0;background:none;text-align:left;font-weight:650;line-height:1.45;padding:0;color:inherit;border-bottom:1px dotted #7d9a9e}.concept-trigger span{font-size:1.1rem;color:#398673;margin-left:4px}.concept-trigger:hover{color:#127563}.concept-popover{position:fixed;z-index:60;background:white;border:1px solid #cfdddf;border-radius:13px;padding:14px;box-shadow:0 12px 48px #082c3930;max-height:80vh;overflow:auto}.popover-caption{display:flex;gap:14px;align-items:center;justify-content:space-between;margin-bottom:11px;font-size:.95rem}.popover-caption .icon-button{width:27px;height:27px;font-size:.8rem}.popover-visual{background:#eaf2f3;border-radius:9px;overflow:hidden;aspect-ratio:5/3;display:grid;place-items:center}.popover-visual svg{width:100%;height:100%;max-height:210px}.popover-visual .concept-photo{width:100%;height:100%;object-fit:contain}.popover-foot{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-top:12px}.popover-foot small{font-size:.75rem;color:#69808b;line-height:1.4}.popover-foot .button{font-size:.8rem;padding:7px 12px;min-height:37px}.concept-dialog{max-width:790px}.concept-large-visual{background:#eaf2f3;border-radius:12px;overflow:hidden;margin-bottom:20px}.concept-large-visual svg{width:100%;max-height:49vh;min-height:200px}.concept-photo{display:block;width:100%;object-fit:contain;max-height:52vh}.concept-large-visual .concept-photo{max-height:48vh}.concept-caption{font-size:1rem;line-height:1.7;margin-top:20px;color:#496674}.concept-dialog .range-row{margin-bottom:18px}.diagram .concept-photo{max-height:340px;object-fit:contain;border-radius:10px;margin:auto;width:auto;max-width:100%}.narration-dialog{max-width:980px}.narration-stage{background:#0d303b;border-radius:12px;overflow:hidden;position:relative;padding:20px 26px 18px;color:white}.scene-top{display:flex;justify-content:space-between;font-size:.75rem;letter-spacing:.12em;color:#bdd9df}.scene-illustration{margin:17px auto 15px;max-width:610px;background:#eaf2f3;border-radius:12px;overflow:hidden;aspect-ratio:5/3}.scene-illustration svg{height:100%;width:100%}.narration-stage h3{text-align:center;font-size:1.2rem;line-height:1.4;letter-spacing:0;margin:10px 0 14px;color:#fff}.scene-progress{height:3px;background:#3a5c68;border-radius:4px;overflow:hidden}.scene-progress>span{display:block;background:var(--mint);height:100%;transition:width .2s linear}.narration-controls{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:17px}.narration-controls .button{font-size:.84rem}.narration-controls #narration-counter{font-size:.83rem;color:#637d86;margin-right:auto}.narration-chapters{display:flex;gap:9px;margin:16px 0 10px}.narration-chapters button{border-radius:50%;width:30px;height:30px;border:1px solid #ccdcd9;background:white;color:#536f74;font-size:.75rem}.narration-chapters button.active{background:var(--green);color:white;border-color:var(--green)}.concept-block>.small-note{font-size:.875rem}.scene-illustration .rotation,.scene-illustration .windflow{animation:none!important}@media(max-width:760px){.concept-dialog{padding:18px}.concept-large-visual svg{min-height:0}.narration-stage{padding:15px 12px}.scene-top{font-size:.75rem;letter-spacing:.04em}.scene-illustration{margin:14px 0;max-height:37vh}.narration-controls{gap:7px}.narration-controls .button{padding:9px 12px;font-size:.8rem}.narration-controls #narration-mute{margin-left:0}.narration-chapters{gap:7px}.scene-top span{font-size:.75rem}.narration-stage h3{font-size:1.05rem}.term p{font-size:1rem;line-height:1.65}.concept-popover{max-height:68vh}.sidebar{padding-top:24px}.sidebar-bottom{display:none}}

/* Tema 3: exercises extend the existing nautical classroom. */
.safety-interactive>p{font-size:1rem;margin:12px 0 20px;color:#526f79}.safety-inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:22px 0}.safety-inputs label{font-size:.95rem;display:grid;gap:8px}.safety-inputs input:not([type=checkbox]),.safety-inputs select{width:100%;background:white;color:var(--ink);border:1px solid #c6d7dc;border-radius:8px;padding:10px 12px;min-height:46px}.safety-inputs .checkbox-label{display:flex;align-items:center;gap:10px}.safety-checklist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}.safety-checklist label{display:flex;align-items:flex-start;gap:11px;border:1px solid #d5e1e3;background:#fff;border-radius:10px;padding:16px;cursor:pointer}.safety-checklist input{width:18px;height:18px;accent-color:#126656;flex-shrink:0;margin-top:4px}.safety-checklist strong{display:block;font-size:1rem}.safety-checklist small{display:block;font-size:.9rem;color:#5b737c;line-height:1.5;margin-top:5px}.safety-checklist label:has(input:checked){background:#edf8f3;border-color:#7db3a2}.safety-table{width:100%;border-collapse:collapse;font-size:.9rem;line-height:1.5}.safety-table caption{text-align:left;font-size:.9rem;font-weight:700;padding:12px 0;color:#38615f}.safety-table th,.safety-table td{text-align:left;border-bottom:1px solid #dce6e8;padding:13px 14px;vertical-align:top}.safety-table th{font-weight:650}.safety-table thead{background:#e7f0ee}.safety-table tbody th{width:31%}.table-scroll{overflow-x:auto;margin:18px 0}.zone-heading{display:flex;gap:15px;align-items:center;flex-wrap:wrap;margin-top:20px}.zone-heading h3{font-size:1.05rem;letter-spacing:0}.safety-hotspot{position:relative;width:min(100%,520px);margin:22px auto;aspect-ratio:1;isolation:isolate}.safety-hotspot img{width:100%;height:100%;object-fit:contain;border-radius:12px}.hotspot-button{position:absolute;transform:translate(-50%,-50%);width:42px;height:42px;border:3px solid #fff;box-shadow:0 2px 9px #072f3e50;background:#126656;color:#fff;border-radius:50%;font-size:1rem;font-weight:700}.hotspot-button[aria-pressed=true]{background:#0e3544;outline:4px solid #9bdac3}.source-note{font-size:.9rem;background:#edf3f4;padding:17px 20px;border-radius:10px;margin:22px 0}.source-note summary{cursor:pointer;font-weight:650}.source-note p{margin-top:12px}.source-note a{text-decoration:underline;text-underline-offset:3px}.source-note li{margin:8px 0}.safety-patterns{display:grid;grid-template-columns:1fr 1fr;gap:14px}.safety-patterns figure{margin:0}.safety-patterns figcaption{font-size:.9rem;margin-top:9px;color:#58747d}.lesson-nav{max-height:calc(100vh - 44px);overflow:auto}.narration-chapters{flex-wrap:wrap}.primary-nav a{font-size:.95rem}.sidebar-heading,.school-label{font-size:.8rem}.concept-dialog .small-note,.concept-dialog .concept-caption{overflow-wrap:anywhere}@media(max-width:760px){.safety-inputs,.safety-checklist,.safety-patterns{grid-template-columns:1fr}.safety-table{min-width:420px}.hotspot-button{width:42px;height:42px}.lesson-nav{max-height:none}.safety-interactive .range-row{flex-wrap:wrap}.safety-interactive .range-row input{min-width:100px}.safety-inputs{gap:14px}.safety-hotspot{max-width:440px}.zone-heading{gap:10px}}@media(prefers-reduced-motion:reduce){.safety-interactive *{scroll-behavior:auto!important}}

/* Topic 4: same classroom surfaces, with responsive interactive diagrams. */
.law-case{margin-top:24px}.law-case .quiz-options{margin-top:22px}
.law-habitat-photo{aspect-ratio:3/2;width:min(100%,720px)}.law-habitat-photo img{object-fit:cover}
.law-interactive .range-row output{min-width:60px}
.law-interactive .range-row[hidden]{display:none}
@media(max-width:620px){.law-interactive .safety-inputs{grid-template-columns:1fr}.law-interactive .range-row{flex-wrap:wrap}.law-interactive .range-row input[type=range]{min-width:120px}}

/* Tema 5 · legible identification diagrams and an explicitly controlled light laboratory. */
.buoy-atlas-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin:24px 0}.buoy-atlas-card{border:1px solid #d8e5e9;border-radius:15px;overflow:hidden;background:#fff}.buoy-atlas-card>svg{display:block;width:100%;height:230px;background:#edf5f7}.buoy-atlas-card>div{padding:19px 21px}.buoy-atlas-card h3{font-size:1.15rem;margin:0 0 12px;line-height:1.45}.buoy-atlas-card p{margin:0 0 12px;font-size:1rem;line-height:1.6}.buoy-atlas-card a{font-size:.9rem;font-weight:700;color:#176554}.buoy-light-label{border-top:1px solid #e5edf0;padding-top:12px;color:#315c67;font-weight:600}.buoy-cardinal-explorer{display:grid;grid-template-columns:1fr;gap:12px}.buoy-interactive>.diagram{margin-bottom:20px}.buoy-interactive>.button{margin-top:18px}.buoy-night-lab{margin:0 0 30px;padding:28px;border-radius:18px;background:#0b2633;color:#f4f8fa;overflow:hidden}.buoy-night-lab .eyebrow{color:#a4e5d2}.buoy-night-lab h2{color:#fff;margin:12px 0;font-size:1.55rem}.buoy-night-heading p{line-height:1.65;color:#c7dbe3}.buoy-night-lab .safety-inputs label{color:#dfedf2}.buoy-night-lab select{background:#173a49;color:#fff;border-color:#587b88;font-size:1rem;min-height:46px}.buoy-night-lab select option{background:#173a49;color:#fff}.buoy-light-scene{display:flex;align-items:center;gap:32px;min-height:150px;padding:22px 18px;margin-top:12px}.buoy-beacon{width:26px;height:26px;min-width:26px;border-radius:50%;background:#223946;outline:1px solid #587b88;outline-offset:5px}.buoy-light-scene strong{font-size:1.35rem}.buoy-light-scene p{color:#c7dbe3;line-height:1.5;min-height:24px;margin:10px 0 0}.buoy-night-lab .small-note{color:#bdd3dc;line-height:1.6}.buoy-night-lab .range-row{color:#fff;margin:22px 0;display:grid;grid-template-columns:auto minmax(60px,1fr) auto}.buoy-night-lab .button.outline{border-color:#8bb2bd;color:#edf7fb;background:transparent}.buoy-night-lab .button.outline:hover{background:#244958}.buoy-night-lab .range-row output{color:#fff;min-width:58px}.buoy-night-lab #buoy-timeline svg{display:block;width:100%;height:auto}.buoy-case{display:grid;grid-template-columns:minmax(190px,.7fr) minmax(0,1.3fr);gap:32px;align-items:start}.buoy-question-picture svg{width:100%;height:auto;max-height:310px}.buoy-case h2{margin-top:0}.buoy-case .quiz-options{margin-top:18px}.buoy-atlas-card .concept-trigger{text-align:left}.buoy-night-lab :focus-visible{outline:3px solid #b2eddb;outline-offset:4px}
@media(min-width:1450px){.buoy-cardinal-explorer{grid-template-columns:1fr 1fr}}
@media(max-width:720px){.buoy-atlas-grid{grid-template-columns:1fr}.buoy-atlas-card>svg{height:235px}.buoy-case{grid-template-columns:1fr;gap:22px}.buoy-question-picture svg{max-height:235px}.buoy-night-lab{padding:20px 16px}.buoy-night-lab .range-row{grid-template-columns:minmax(0,1fr) auto}.buoy-night-lab .range-row label{grid-column:1/-1}.buoy-light-scene{gap:24px;padding:18px 10px}.buoy-light-scene strong{font-size:1.15rem}.buoy-night-lab .safety-inputs{grid-template-columns:1fr}.buoy-night-lab .diagram-controls{gap:9px}}

/* Tema 6 · watchkeeping exercises, light signatures and sound practice */
.ripa-field{display:grid;gap:8px;margin:20px 0;font-weight:650;font-size:1rem}.ripa-field select{width:100%;min-height:46px;padding:10px 13px;border:1px solid #a8c2ca;border-radius:9px;background:#fff;color:#173e4c;font:inherit;font-weight:500}.ripa-context{background:#e9f4f2;color:#1e5a50;border-radius:8px;padding:12px 15px;font-size:.95rem;line-height:1.55}.ripa-sound-pattern{display:flex;flex-wrap:wrap;align-items:center;gap:12px;min-height:98px;padding:22px 14px;margin:18px 0;border-radius:13px;background:#0b2936;color:#c4edde}.ripa-note{display:inline-flex;justify-content:center;align-items:center;min-width:30px;height:45px;padding:4px 7px;border:1px solid #547f89;border-radius:5px;font-size:1.15rem}.ripa-note-L{min-width:92px}.ripa-note-B{min-width:120px;font-size:1rem}.ripa-note.playing{background:#b2eddb;color:#0b2936;border-color:#b2eddb}.ripa-player details{margin:16px 0}.ripa-player summary{cursor:pointer;font-weight:650}.ripa-player .diagram-controls{flex-wrap:wrap}.ripa-game{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:30px;align-items:start}.ripa-game h2{margin-top:0;font-size:1.45rem;line-height:1.4}.ripa-game .quiz-options{margin-top:20px}.ripa-game-visual>.diagram,.ripa-game-visual>div>.diagram{margin-top:0}.ripa-game-visual>svg{display:block;width:100%;height:auto}.ripa-game-visual{min-width:0}.ripa-game .range-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px}.ripa-game .range-row label{grid-column:1/-1}.ripa-sign-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.ripa-sign-card{border:1px solid #d3e1e6;border-radius:15px;overflow:hidden;background:#fff}.ripa-sign-card>svg{display:block;width:100%;height:auto}.ripa-sign-card>div{padding:20px}.ripa-sign-card h3{font-size:1.2rem;line-height:1.4;margin:0 0 12px}.ripa-sign-card p{font-size:1rem;line-height:1.6;margin:12px 0}.ripa-sign-card a{color:#1b6758;font-size:.95rem;font-weight:650}.ripa-player .button{min-height:44px}.ripa-sound-lab .diagram-feedback{margin-top:16px}.ripa-game .button:disabled{opacity:.6}
@media(max-width:1000px){.ripa-game{grid-template-columns:1fr;gap:22px}.ripa-game-visual>svg,.ripa-game-visual .diagram{max-width:650px;margin-left:auto;margin-right:auto}}
@media(max-width:650px){.ripa-sign-grid{grid-template-columns:1fr}.ripa-note-L{min-width:65px}.ripa-sound-pattern{gap:8px;padding:16px 10px}.ripa-field select{font-size:1rem}.ripa-game h2{font-size:1.25rem}}
.man-controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:16px;align-items:end;margin:20px 0}.man-field{display:flex;flex-direction:column;gap:8px;font-size:1rem;font-weight:600;margin:16px 0}.man-controls .man-field{margin:0}.man-field select{font:inherit;font-weight:400;width:100%;min-width:0;min-height:46px;padding:10px 36px 10px 12px;color:var(--navy,#153b49);background:#fff;border:1px solid #9eb6bf;border-radius:8px}.man-field select:focus-visible,.man-lab input:focus-visible{outline:3px solid #087c68;outline-offset:3px}.man-lab .range-row small{font-size:.875rem;font-weight:400}.man-sequence .diagram-controls{justify-content:center;gap:18px}.man-sequence .diagram-controls span{font-size:1rem;font-variant-numeric:tabular-nums}.man-lab .diagram-feedback{min-height:100px}.man-game{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:30px;align-items:start}.man-game .diagram{padding:0;overflow:hidden;min-width:0}.man-game .quiz-options{margin-top:20px}.man-game h2{font-size:1.4rem;line-height:1.4}.man-game .diagram-feedback{margin-top:18px}.man-game .quiz-actions{flex-wrap:wrap}.man-game .quiz-option{width:100%;text-align:left;white-space:normal;line-height:1.5;font-size:1rem}.man-lab .button:disabled{opacity:.5;cursor:default}@media(max-width:1050px){.man-game{grid-template-columns:1fr}.man-game .diagram{max-width:720px;width:100%;margin-inline:auto}}@media(max-width:600px){.man-controls{grid-template-columns:1fr}.man-lab .range-row{flex-wrap:wrap}.man-sequence .diagram-controls{gap:10px}.man-game{gap:20px}}

/* Tema 8: functional emergency learning surfaces. */
.em-lab>p{margin:14px 0 20px;color:#526f79;font-size:1rem}.em-lab .small-note{margin-top:18px}.em-field{display:grid;gap:8px;margin:22px 0;font-size:1rem}.em-field select{width:100%;max-width:100%;border:1px solid #b4ccd2;border-radius:9px;background:#fff;padding:12px;color:var(--ink);min-height:48px}.em-lab .range-row{display:grid;grid-template-columns:minmax(130px,1fr) minmax(80px,1fr) 45px;gap:16px;margin:22px 0}.em-lab .range-row input{width:100%;min-width:0}.em-lab .range-row output{text-align:right;font-variant-numeric:tabular-nums}.em-subtitle{margin-top:28px;margin-bottom:15px;font-size:1.2rem}.em-lab .diagram{margin-top:20px}.em-case-number{display:inline-block;color:#126656;font-weight:700;font-size:.875rem;letter-spacing:.12em;margin-bottom:15px}.em-game{margin-top:25px}.em-game h2{font-size:1.5rem;line-height:1.4}.em-game .diagram{max-width:650px;margin:24px auto 0}.em-lab .pill{min-height:44px;white-space:normal}.em-lab .pill[aria-pressed=true]{background:#126656;color:#fff;border-color:#126656}@media(max-width:600px){.em-lab .range-row{grid-template-columns:1fr 48px}.em-lab .range-row label{grid-column:1/-1}.em-lab .diagram-controls{gap:8px}.em-lab .pill{flex:1 1 120px}.em-game h2{font-size:1.25rem}}
.em-equipment{display:grid;grid-template-columns:minmax(160px,260px) 1fr;align-items:center;gap:24px;background:white;border:1px solid var(--line);border-radius:14px;padding:20px;margin:26px 0}.em-equipment img{display:block;width:100%;max-height:260px;object-fit:contain}.em-equipment p{margin-top:12px;font-size:1rem;color:#526f79}@media(max-width:600px){.em-equipment{grid-template-columns:1fr}.em-equipment img{max-width:230px;margin:auto}}

/* Tema 9: weather experiments, readable on keyboard, touch and pointer. */
.met-lab>p{margin:14px 0 22px}.met-graphic{margin:22px 0}.met-controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,225px),1fr));gap:20px;margin:22px 0;align-items:end}.met-field{display:grid;gap:9px;font-size:1rem;font-weight:600;min-width:0}.met-field select{font:inherit;font-weight:400;color:#173e4c;background:#fff;min-width:0;width:100%;min-height:48px;padding:11px 32px 11px 12px;border:1px solid #a3bfc8;border-radius:9px}.met-lab .met-range{display:grid;grid-template-columns:minmax(0,1fr) 50px;gap:12px;margin:0}.met-range label{grid-column:1/-1;font-size:1rem}.met-range input{min-width:0;width:100%;min-height:30px}.met-range output{font-size:1rem;font-variant-numeric:tabular-nums;text-align:right}.met-animation,.met-presets{grid-column:1/-1}.met-animation{display:grid;grid-template-columns:auto minmax(160px,1fr);align-items:end;gap:24px;padding-top:18px;border-top:1px solid #cfdee2}.met-lab input:focus-visible,.met-field select:focus-visible,.met-reset:focus-visible{outline:3px solid #147b66;outline-offset:4px}.met-lab .diagram-feedback{min-height:100px}.met-reset{display:block;margin:20px 0 0;padding:8px 0;background:none;border:0;text-decoration:underline;text-underline-offset:4px;color:#315c67;font:inherit;cursor:pointer;min-height:44px}.met-secondary{border-top:1px solid #d3e1e6;margin-top:28px;padding-top:24px}.met-secondary h3{font-size:1.2rem;margin-bottom:16px}.met-room-select{margin:28px 0;max-width:760px}.met-links{display:grid;gap:12px;margin:18px 0}.met-links a{color:#176958;text-underline-offset:4px;line-height:1.5;overflow-wrap:anywhere}.met-table{width:100%;border-collapse:collapse;margin:26px 0;background:#fff}.met-table caption{text-align:left;font-weight:700;padding:14px 0;font-size:1.15rem}.met-table th,.met-table td{text-align:left;border-bottom:1px solid #d6e4e8;padding:12px 16px;font-size:1rem;white-space:normal}.met-table thead{background:#e5f1ee}.met-case-tag{display:block;font-size:.8rem;font-weight:700;letter-spacing:.11em;color:#126656;margin-bottom:16px}.met-game-graphic{max-width:680px;margin:28px auto 0}.met-lab [hidden]{display:none!important}#met-wave-controls{display:grid;gap:18px}.met-presets{flex-wrap:wrap}.met-presets .pill{min-height:44px}@media(max-width:600px){.met-controls{grid-template-columns:1fr}.met-animation{grid-template-columns:1fr;gap:18px}.met-table th,.met-table td{padding:11px 9px;font-size:.95rem}.met-lab .diagram-feedback{min-height:0}.met-room-select select{font-size:.95rem}.met-graphic{margin-inline:-8px}}


/* Themes 10–11: navigation experiments and a responsive chart desk. */
.nav-lab,.chart-lab{overflow:hidden}.nav-graphic{margin:22px 0}.nav-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 26px;margin:20px 0}.nav-field{display:grid;gap:8px;font-size:14px;font-weight:650;color:var(--ink,#0b2c38)}.nav-field select{width:100%;min-width:0;min-height:45px;padding:10px 12px;border:1px solid #a9c4cb;border-radius:9px;background:#fff;color:#143943;font:inherit}.nav-room-select{max-width:680px;margin:24px 0}.nav-range{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}.nav-range label{grid-column:1/-1;font-size:14px}.nav-range input{width:100%;min-width:0;accent-color:#126656}.nav-range output{font-size:14px;min-width:58px;text-align:right;font-variant-numeric:tabular-nums}.nav-reset{margin-top:18px;padding:8px 0;border:0;background:transparent;font:inherit;font-size:14px;color:#245a69;text-decoration:underline;cursor:pointer}.chart-lab-heading{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}.chart-lab-heading h2{margin-bottom:0}.chart-lab-heading .button{white-space:nowrap}.chart-question{line-height:1.7;max-width:850px;margin:20px 0}.chart-graphic{margin:20px 0;background:#f0f7f8;border-radius:16px}.chart-graphic svg{display:block;width:100%;height:auto}.chart-clickable{cursor:crosshair}.chart-answer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.chart-field{display:grid;gap:8px;font-size:14px;font-weight:650}.chart-field>div{display:flex;align-items:center;gap:9px}.chart-field input{box-sizing:border-box;min-width:0;width:100%;min-height:46px;padding:10px 12px;border:1px solid #99b9c3;border-radius:9px;font:inherit;font-size:16px;color:#0b2c38;background:#fff}.chart-field input[aria-invalid=true]{border:2px solid #a3482e;background:#fff8f4}.chart-field input:focus,.nav-field select:focus{outline:3px solid #93daca;outline-offset:2px}.chart-guide{margin-top:24px;border-top:1px solid #cbdbdf;padding-top:22px}.chart-guide>p{line-height:1.7}.chart-solution{padding:17px 20px;background:#eef8f4;border-left:3px solid #126656;border-radius:0 8px 8px 0}.chart-result-list{padding-left:22px;line-height:1.7;margin:12px 0}.chart-explorer{margin-top:22px;padding:18px;border:1px solid #ccdde0;border-radius:12px}.chart-explorer summary{cursor:pointer;font-weight:650;line-height:1.6}.chart-explorer .nav-field{margin:20px 0 16px}.chart-lab .diagram-feedback p{margin:10px 0 0}.chart-lab .quiz-actions{flex-wrap:wrap}.chart-lab .small-note{overflow-wrap:anywhere}.chart-graphic:not(.chart-clickable){touch-action:pan-y}.nav-lab button:disabled,.chart-lab button:disabled{opacity:.5;cursor:default}
@media(min-width:1200px){.chart-answer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:680px){.nav-controls,.chart-answer-grid{grid-template-columns:1fr}.chart-lab-heading{align-items:flex-start}.chart-lab-heading .button{padding:10px 14px}.chart-graphic{overflow-x:auto}.chart-graphic>svg{min-width:590px}.chart-explorer .diagram{overflow-x:auto}.chart-explorer svg{min-width:530px}.chart-lab .quiz-actions .button{flex:1}.chart-question{font-size:15px}.nav-range output{min-width:64px}}

.chart-ruler{margin:14px 0 22px;padding:16px;background:#f7f1f5;border-radius:12px}.chart-ruler .quiz-actions{margin:0}.chart-ruler-status{font-size:15px;color:#65365a;line-height:1.65;margin:12px 0 0}.chart-graphic:has(svg[tabindex]){cursor:crosshair}.chart-graphic svg:focus{outline:3px solid #8a4777;outline-offset:-3px}

/* Official topic titles and individual topic photography. */
.course-hero{min-height:350px}.course-hero .hero-content{max-width:590px;width:73%;padding:30px}.course-hero h2{font-size:clamp(2rem,2.6vw,2.65rem);line-height:1.13;text-wrap:balance}.course-hero p{font-size:1rem;line-height:1.55;max-width:390px}.course-hero p.course-subtitle{font-size:1.125rem;color:#b2eddb;line-height:1.35;font-weight:500;margin-bottom:14px}.course-subtitle br{display:none}.course-subtitle em{font-style:normal}.course-hero.hero--long-title h2{font-size:clamp(1.65rem,2vw,2rem);line-height:1.2}.hero--object{background:#edf3f3}.hero--object .hero-image{inset:0 0 0 auto;width:51%;object-fit:contain;object-position:center}.hero--object:after{background:linear-gradient(90deg,#092d3a 0%,#092d3a 35%,rgba(9,45,58,.92) 47%,rgba(9,45,58,.15) 69%,transparent 82%)}
@media(max-width:1250px){.course-hero .hero-content{width:78%;padding:26px}.course-hero h2{font-size:2rem}}@media(max-width:650px){.course-hero .hero-content{width:100%;padding:26px 23px}.course-hero h2{font-size:2rem;max-width:330px}.course-hero p{max-width:310px}.course-hero.hero--long-title h2{font-size:1.75rem}.course-hero:after{background:linear-gradient(90deg,rgba(4,31,43,.94),rgba(4,31,43,.78) 65%,rgba(4,31,43,.48))}.hero--object .hero-image{width:70%;opacity:.85}}