:root{color-scheme:dark;--bg:#0a1216;--panel:#101e23;--panel2:#14262b;--line:#273b40;--text:#eaf1ee;--muted:#a7b8b8;--green:#76e3bb;--cyan:#89cbe7;--radius:18px;font-family:Arial,Helvetica,sans-serif;font-size:16px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:radial-gradient(ellipse at 87% 4%,#10302966,transparent 24%),var(--bg);color:var(--text);line-height:1.65}a{color:inherit;text-underline-offset:4px}button,input,select{font:inherit}button,.button,select{min-height:44px;border:1px solid var(--line);border-radius:9px;background:#17282e;color:var(--text);padding:10px 17px;cursor:pointer;line-height:1.4}button:hover,.button:hover{background:#213d40;border-color:#66bba0}button:disabled{opacity:.4;cursor:default}button.primary,.button.primary{background:var(--green);color:#0b241d;border-color:var(--green);font-weight:700}button.primary:hover,.button.primary:hover{background:#a0f4d2}button[aria-pressed=true]{background:#24443e;color:#9bf0cf;border-color:#6cd8b0}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,select:focus-visible{outline:3px solid #9bdafa;outline-offset:4px}button:disabled:hover{border-color:var(--line)}input{accent-color:var(--green)}.wrap{width:min(1240px,calc(100% - 64px));margin-inline:auto}.site-header{min-height:96px;display:flex;justify-content:space-between;align-items:center;gap:24px;border-bottom:1px solid var(--line)}.logo{max-width:210px;object-fit:contain}.site-header nav{display:flex;gap:32px;align-items:center}.site-header nav a{text-decoration:none;font-size:14px}.site-header nav .current{color:var(--green);border:1px solid #2a5e50;padding:9px 17px;border-radius:7px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--muted);padding:25px 0 12px}.breadcrumbs a{text-decoration:none}.hero{display:grid;grid-template-columns:1.18fr 1fr;gap:38px;align-items:center;padding:32px 0 48px;border:0;margin:0}.eyebrow{font-size:12px;letter-spacing:1.65px;font-weight:700;color:var(--green);margin:0 0 18px}.pill{padding:5px 10px;border:1px solid #3f715d;border-radius:5px;margin-right:10px;font-size:11px}h1{font-size:clamp(36px,4.1vw,57px);line-height:1.12;letter-spacing:-1.9px;font-weight:600;margin:22px 0}h1 span{color:var(--green)}.hero-copy{color:#b2c2c0;font-size:17px;line-height:1.75;max-width:590px}.hero-actions{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin:27px 0 20px}.button{text-decoration:none;display:inline-flex;align-items:center;justify-content:space-between;gap:20px;font-size:14px}.hero-visual{align-self:stretch;display:flex;flex-direction:column;justify-content:center;background:linear-gradient(145deg,#12272155,#0b181700);border:1px solid #28403988;border-radius:24px;overflow:hidden;position:relative}.hero-visual:before{content:'';position:absolute;inset:0;background-image:linear-gradient(#8bbaa308 1px,transparent 1px),linear-gradient(90deg,#8bbaa308 1px,transparent 1px);background-size:28px 28px;pointer-events:none}.hero-visual svg{width:100%;position:relative}.visual-top{display:flex;justify-content:space-between;gap:20px;padding:22px 25px 0;color:#8da99f;font-size:10px;letter-spacing:2px}.hero-visual p{font-size:12px;color:var(--muted);text-align:center;margin:0 20px 24px}.micro{font-size:12px;color:var(--muted);line-height:1.7}.course-strip{display:grid;grid-template-columns:1fr 1fr 1fr 1.15fr;border-block:1px solid var(--line);padding:22px 0;gap:25px}.course-strip>div{display:flex;gap:17px;align-items:center}.course-strip b{font-size:31px;color:#bfd3ca;font-weight:400;font-family:Georgia,serif}.course-strip span{font-size:12px;line-height:1.5;color:var(--muted)}.course-strip a{font-size:13px;color:var(--green);align-self:center;text-decoration:none}.anchors{display:flex;flex-wrap:wrap;gap:7px;padding:24px 0}.anchors a{white-space:nowrap;text-decoration:none;border:1px solid var(--line);border-radius:7px;font-size:12px;padding:9px 12px}.anchors a:hover{color:var(--green);background:var(--panel)}.progress-bar{display:flex;align-items:center;gap:16px;font-size:12px;color:var(--muted);padding-bottom:20px}.progress-bar>span{color:var(--green);white-space:nowrap}.progress-bar button{margin-left:auto;font-size:12px;background:transparent;padding:4px 10px}.progress-bar #progress-list{display:flex;flex-wrap:wrap;gap:10px}.progress-bar .done{color:var(--green)}section{padding:58px 0;border-top:1px solid var(--line)}.section-heading{display:flex;gap:22px;align-items:flex-start;margin-bottom:27px}.section-no{font-size:14px;line-height:42px;flex-shrink:0;text-align:center;width:44px;height:44px;border-radius:50%;border:1px solid #386455;color:var(--green);margin-top:3px}.section-heading .eyebrow{margin:0 0 7px;font-size:10px}.section-heading h2{font-size:clamp(25px,2.7vw,35px);line-height:1.24;letter-spacing:-.7px;max-width:860px;margin:0 0 13px;font-weight:500}.lede{color:var(--muted);max-width:850px;margin:0;font-size:15px}.panel{border:1px solid var(--line);background:linear-gradient(120deg,#13252a,#101c22);border-radius:var(--radius);padding:28px;min-width:0}.two-col{display:grid;grid-template-columns:1.25fr 1fr;gap:20px}.panel h3{font-size:21px;font-weight:500;line-height:1.4;margin:0 0 14px}.panel p{font-size:14px;color:var(--muted)}.panel-top{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:13px;flex-wrap:wrap}.panel-top h3{margin:0}.tag{font-size:11px;color:#bcd4cc;padding:4px 9px;border:1px solid #35514a;border-radius:5px}.quiet{background:radial-gradient(at 100% 0,#20423966,transparent 70%),#101c21}.taxonomy-list{padding:0;list-style:none;display:grid;gap:7px;counter-reset:rank}.taxonomy-list li{display:flex;gap:10px;align-items:center;background:#0b181f;border:1px solid var(--line);border-radius:8px;padding:7px 9px;font-size:14px}.taxonomy-list li:before{counter-increment:rank;content:counter(rank,decimal-leading-zero);color:#769590;font-size:11px;min-width:22px}.taxonomy-list .item-label{flex:1}.taxonomy-list button{min-width:44px;padding:6px;min-height:44px}.taxonomy-list li[draggable=true]{cursor:grab}.taxonomy-list li.correct{border-color:#65bfa0}.taxonomy-list li.incorrect{border-color:#dba896}.actions{display:flex;flex-wrap:wrap;gap:9px}.actions button{font-size:13px}.feedback{margin-top:16px;font-size:14px}.feedback:empty{display:none}.feedback.good{color:#a2f0cb}.feedback.bad{color:#ffd3ae}.static-taxonomy{padding:0;list-style:none}.static-taxonomy li{display:flex;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px}.static-taxonomy li span{color:var(--muted)}.note{background:#16332980;border-left:2px solid var(--green);padding:15px 18px;border-radius:0 9px 9px 0;font-size:14px;line-height:1.75}.takeaway{font-size:14px;color:var(--muted);margin:21px 0 0;padding-left:15px;border-left:2px solid #416757}.takeaway strong{color:#d5e9dd;display:block;font-size:12px;margin-bottom:4px}summary{cursor:pointer;min-height:44px;padding-block:12px;color:#dce9e3;font-size:15px}details[open] summary{color:var(--green)}.segmented{display:flex;gap:4px;flex-wrap:wrap;background:#0b161b;border:1px solid var(--line);padding:4px;border-radius:10px;width:fit-content;margin-bottom:22px}.segmented button{font-size:13px;background:transparent;border-color:transparent}.comparison-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 30px;margin-bottom:28px}.comparison-grid article{padding:19px 0;border-bottom:1px solid var(--line)}.comparison-grid h3{font-size:16px;font-weight:500;color:#d5ede3;margin:0 0 7px}.comparison-grid p{font-size:14px;color:var(--muted);margin:0}.anatomy{display:grid;grid-template-columns:1fr 1fr;gap:24px}.anatomy-controls{display:flex;gap:7px;flex-wrap:wrap}.anatomy-controls button{font-size:12px;padding:8px 11px}.skeleton-pair{display:grid;grid-template-columns:1fr 1fr;gap:5px}.skeleton-pair figure{margin:0}.skeleton-pair svg{width:100%;max-height:330px}.skeleton-pair figcaption{text-align:center;font-size:12px;color:var(--muted)}fieldset{border:0;padding:0;margin:0 0 18px;min-width:0}legend{font-size:16px;padding:0 0 15px;color:#d3e7dd}#bipedal-options{display:grid;grid-template-columns:1fr 1fr;gap:9px}label.choice{display:flex;align-items:flex-start;gap:12px;min-height:48px;padding:13px 15px;border:1px solid var(--line);border-radius:8px;font-size:14px;cursor:pointer;background:#0c181d}label.choice:has(input:checked){border-color:#6ebd9f;background:#18352f}label.choice input{width:18px;height:18px;flex-shrink:0;margin:2px 0}label.choice:has(input:focus-visible){outline:2px solid #8ccee7}#bipedal-reset{margin:8px}.branch-tree{overflow-x:auto;background:#09171c;border-radius:12px;padding:12px}.branch-tree svg{width:100%;min-width:650px;display:block}.branch-tree svg text{font:14px Arial,sans-serif;fill:#c4d8d1}.branch-tree svg text.latin{font-style:italic;font-size:15px}.branch-tree .edge{stroke:#627c77;stroke-dasharray:5 6;stroke-width:2;fill:none}.branch-tree svg .leaf{cursor:pointer}.branch-tree svg .leaf:hover rect{stroke:#dffff3}.taxon-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:18px 0}.taxon-buttons button{font-size:12px;text-align:left;padding:12px;overflow-wrap:anywhere}.taxon-buttons em{display:block;color:#cce7dc;font-size:14px}.taxon-card{border-top:1px solid var(--line);padding:24px 0 5px;display:grid;grid-template-columns:1fr 1.5fr;gap:20px}.taxon-card h3{font-size:25px;color:var(--green);margin-bottom:4px}.taxon-card em{font-size:17px}.taxon-card ul{font-size:14px;color:#c9dcd4;padding-left:19px}.taxon-card p{margin:7px 0}#time-output{font-family:Georgia,serif;color:var(--green);font-size:26px}#timeline label[for]{display:block;font-size:13px;color:var(--muted)}input[type=range]{width:100%;height:44px;cursor:pointer}.range-ends{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:24px}.time-row{display:grid;grid-template-columns:225px 1fr;gap:18px;align-items:center;min-height:60px;padding:6px 0}.time-row button{background:transparent;text-align:left;border-color:transparent;padding:5px;font-size:14px;font-style:italic}.time-row.active button:after{content:' · сейчас в модели';display:block;font-size:10px;font-style:normal;color:var(--green)}.time-track{position:relative;height:31px;border-inline:1px solid var(--line);background:repeating-linear-gradient(90deg,#12232a 0,#12232a calc(25% - 1px),#29413f 25%)}.time-segment{position:absolute;top:9px;height:13px;border-radius:9px;background:var(--taxon-color);opacity:.25;min-width:2px}.active .time-segment{opacity:1;box-shadow:0 0 14px color-mix(in srgb,var(--taxon-color),transparent 70%)}.time-marker{position:absolute;top:-5px;bottom:-5px;width:1px;background:#e4fff1;z-index:1}.outside{font-size:11px;position:absolute;left:9px;top:4px;color:#819b96}.region-map{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.region-card{background:#0b191e;border:1px solid var(--line);border-radius:9px;padding:16px;font-size:12px}.region-card b{color:var(--green);font-size:14px}.region-card p{font-size:12px}.fossil-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:20px}.fossil-grid button{padding:18px 14px;text-align:left;background:#102128;display:flex;gap:10px;align-items:center;font-size:14px}.fossil-grid span{font-family:Georgia,serif;font-size:22px;color:var(--green)}.quiz-nav{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:22px}.quiz-nav button{font-size:12px;min-width:44px;padding:8px}.quiz-nav button.answered{border-color:#5cb798}.quiz .question-count{color:var(--green);font-size:12px;letter-spacing:1px}.quiz h3{font-size:23px;max-width:890px}.quiz .choice{max-width:920px;margin-bottom:9px}.quiz .actions{margin-top:22px}.quiz .summary-score{font-size:28px;color:var(--green);font-family:Georgia,serif}.kinship-slots{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}.kinship-slots label{display:flex;flex-direction:column;gap:8px;font-size:12px}.kinship-fork{display:flex;justify-content:center;gap:70px;margin:25px 0;color:var(--green);font-size:14px}.theory-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px 40px}.theory-grid article{border-top:1px solid #30413d;padding-top:20px}.theory-grid h2{font-size:21px;font-weight:500;line-height:1.4;margin:0 0 10px}.theory-grid p{font-size:15px;color:var(--muted);margin:0}.faq details{border-bottom:1px solid var(--line);padding:7px 0}.faq summary{font-size:17px}.faq p{max-width:900px;color:var(--muted);font-size:15px}.model-note{padding:30px;border:1px solid #355b4e;border-radius:15px;background:#122820}.model-note h2{font-size:26px;font-weight:500;margin:0}.model-note p{font-size:14px;color:#b4c9bf}.model-note .eyebrow{color:var(--green);font-size:10px}.model-note a{color:#9de3c2}.next-topic{text-align:center;padding:45px 0 30px}.next-topic>span{font-size:10px;letter-spacing:2px;color:var(--muted)}.next-topic p{font-size:20px;margin:8px 0}.next-topic small{font-size:12px;color:var(--muted)}.bottom-nav{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 0;border-block:1px solid var(--line);font-size:14px}.bottom-nav a{text-decoration:none;color:var(--green)}.bottom-nav span{font-size:12px;color:var(--muted)}footer{display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#879e99;padding-block:28px 60px}dialog{max-width:min(500px,calc(100% - 32px));border:1px solid #4b7a66;border-radius:16px;background:#112620;color:var(--text);padding:28px}dialog::backdrop{background:#000a}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#204338;border:1px solid #689f85;padding:10px 20px;border-radius:8px;font-size:14px;max-width:calc(100% - 32px);z-index:10}#toast:empty{display:none}.skip{position:absolute;top:-100px;left:10px;background:#fff;color:#000;padding:10px;z-index:20}.skip:focus{top:10px}table{width:100%;border-collapse:collapse;font-size:14px;margin-top:20px}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line)}th{color:var(--green)}.table-scroll{overflow:auto}em{font-style:italic}@media(min-width:1500px){.hero{gap:70px}}@media(max-width:1024px){.wrap{width:calc(100% - 40px)}h1{font-size:43px}.hero{gap:25px}.course-strip{gap:15px}.panel{padding:22px}.two-col{grid-template-columns:1.2fr 1fr}.site-header nav{gap:20px}.taxon-buttons{grid-template-columns:repeat(2,1fr)}}@media(max-width:767px){.wrap{width:calc(100% - 32px)}.site-header{min-height:80px;gap:12px}.logo{width:150px;height:40px}.site-header nav{gap:10px}.site-header nav a{font-size:12px}.site-header nav .current{padding:8px}.site-header nav a:first-child{display:none}.hero{grid-template-columns:1fr;padding-top:23px;gap:25px}.hero-visual{max-height:380px}.hero-visual svg{max-height:310px}.hero h1{font-size:43px;max-width:610px}.hero-copy{font-size:16px}.hero-actions{margin-top:22px}.course-strip{grid-template-columns:repeat(3,1fr);gap:12px}.course-strip>div{gap:10px}.course-strip b{font-size:26px}.course-strip span{font-size:10px}.course-strip a{grid-column:1/-1;margin-top:6px}.anchors{flex-wrap:nowrap;overflow-x:auto;padding:20px 0}.anchors a{min-height:44px;display:flex;align-items:center}.progress-bar{flex-wrap:wrap}.progress-bar button{margin-left:0}.progress-bar #progress-list{width:100%;order:3}.two-col,.anatomy,.theory-grid{grid-template-columns:1fr}.section-heading{gap:14px}.section-heading h2{font-size:27px}.section-no{width:36px;height:36px;line-height:34px;font-size:12px}.section-heading .eyebrow{font-size:9px}section{padding:38px 0}.panel{padding:20px}.comparison-grid{gap:0 20px}.comparison-grid h3{font-size:15px}.comparison-grid p{font-size:13px}#bipedal-options{grid-template-columns:1fr}.fossil-grid{grid-template-columns:repeat(2,1fr)}.taxon-card{grid-template-columns:1fr;gap:5px}.region-map{grid-template-columns:1fr}.time-row{grid-template-columns:1fr;gap:0;margin-bottom:12px}.time-row button{font-size:14px}.time-row.active button:after{display:inline;margin-left:5px}.time-track{height:27px}.taxon-buttons em{font-size:13px}.taxon-buttons button{padding:10px;font-size:11px}.kinship-slots{flex-direction:column;align-items:stretch}.kinship-fork{gap:20px;font-size:12px}.bottom-nav{flex-wrap:wrap}.bottom-nav span{order:3;width:100%;text-align:center}.bottom-nav a{font-size:12px}.next-topic p{font-size:18px}.next-topic small{display:block}.model-note{padding:22px}footer{flex-direction:column;gap:5px}.theory-grid{gap:24px}.quiz h3{font-size:20px}.quiz-nav{gap:4px}.quiz-nav button{min-width:44px}.panel-top .segmented{margin:0}.tag{white-space:normal}.hero .eyebrow{font-size:10px;letter-spacing:1px}.breadcrumbs{font-size:11px;gap:8px}.panel p{font-size:14px}}@media(max-width:390px){h1,.hero h1{font-size:36px;letter-spacing:-1.1px}.hero-actions .button{font-size:13px;width:100%;padding:12px}.panel{padding:16px}.comparison-grid{grid-template-columns:1fr}.site-header .logo{width:139px}.site-header nav{gap:8px}.course-strip b{font-size:22px}.course-strip span{font-size:9px}.section-heading h2{font-size:25px}.fossil-grid button{font-size:13px;padding:13px 10px}.hero-visual p{font-size:11px}.skeleton-pair figcaption{font-size:11px}.taxon-buttons{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}@media print{.site-header,.hero-actions,.anchors,.progress-bar,button,input,.quiz,.fossil-grid,dialog,#toast{display:none!important}body{background:white;color:black}.wrap{width:100%}section{break-inside:avoid}.panel{background:white;color:black}p,.lede,.micro{color:#333!important}.hero-visual{display:none}.hero{display:block}.faq details>p{display:block}.faq details{break-inside:avoid}}

/* Keep the phylogenetic labels readable inside their own mobile scroll area. */
.branch-tree svg{min-width:980px}


.biped-layout{display:grid;grid-template-columns:1fr 230px;gap:22px}.biped-layout figure{margin:0}.biped-layout svg{width:100%;max-height:360px}.biped-layout figcaption{font-size:12px;color:var(--muted)}@media(max-width:1024px){.biped-layout{grid-template-columns:1fr} .biped-layout figure{max-width:240px;margin:auto}}