:root{--deep:#09233d;--teal:#087f70;--aqua:#5ce2c2;--paper:#fff;--sky:#eaf2f7}body{background:#edf3f7;color:var(--deep)}button,input{font:inherit}.explore-wrap{width:min(1200px,calc(100% - 48px));margin-inline:auto}.explore-header{background:#fff;border-bottom:1px solid #d6e2e9}.explore-header .explore-wrap{display:flex;align-items:center;justify-content:space-between;min-height:74px;gap:20px}.explore-brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:750;text-decoration:none}.explore-mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;background:var(--deep);color:white;font-size:24px;line-height:1}.explore-mark span{color:var(--aqua)}.explore-header nav{display:flex;gap:24px;margin:0}.explore-header nav a{font-size:14px;text-decoration:none;border-bottom:1px solid transparent}.explore-header nav a:hover{border-color:currentColor}.explore-intro{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(250px,.55fr);gap:48px;align-items:end;padding-block:36px 30px}.explore-kicker,.card-index{font:700 12px/1.3 'Segoe UI',Arial,sans-serif;letter-spacing:.14em;color:var(--teal)}.explore-kicker span{font-size:11px}.explore-intro h1{font-size:clamp(40px,5.5vw,70px);margin:15px 0 17px;line-height:1.02;letter-spacing:-.055em}.explore-intro h1 em{font-style:normal;color:var(--teal)}.explore-intro p:not(.explore-kicker){font-size:18px;line-height:1.55;max-width:680px;color:#4b6174;margin:0}.explore-intro-aside{border-top:2px solid var(--teal);padding-top:14px;display:grid;gap:14px}.explore-intro-aside span,.panel-heading{font:700 11px/1.3 'Segoe UI',Arial,sans-serif;letter-spacing:.12em}.explore-intro-aside strong{font-size:18px;line-height:1.35}.explore-intro-aside a{font-size:14px;font-weight:650;color:var(--teal);text-underline-offset:4px}.lab{display:grid;grid-template-columns:minmax(285px,340px) minmax(0,1fr);gap:16px;align-items:stretch}.lab-controls,.lab-result,.lesson-card,.continue-card{background:var(--paper);border:1px solid #d5e2e9;border-radius:14px;box-shadow:0 14px 35px #09233d09}.lab-controls{padding:25px 25px 30px}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#668092}.live-badge{white-space:nowrap;color:var(--teal);letter-spacing:0;text-transform:none;font-size:12px}.lab h2{font-size:27px;letter-spacing:-.025em;margin:23px 0 8px}.lab-controls>p{font-size:14px;color:#5c7181;line-height:1.5;margin:0 0 34px}.control{padding:20px 0;border-top:1px solid #e3ebef}.control label{display:flex;align-items:start;justify-content:space-between;gap:14px;font-size:14px;font-weight:650;line-height:1.35}.control output{font-size:19px;color:var(--teal);font-weight:750;white-space:nowrap}.control input{display:block;width:100%;margin:19px 0 8px;accent-color:var(--teal);cursor:pointer;min-height:24px}.range-ends{display:flex;justify-content:space-between;color:#78909e;font-size:12px}.reset-button,.share-button{border:0;background:none;color:var(--teal);font-size:13px;font-weight:650;padding:9px 0;cursor:pointer;text-align:left;text-decoration:underline;text-underline-offset:4px}.reset-button{margin-top:13px}.lab-result{padding:25px 27px 19px;min-width:0}.balance-status{font-size:12px;color:var(--teal);letter-spacing:0;text-transform:none}.result-heading{display:flex;align-items:baseline;justify-content:space-between;gap:20px}.result-heading h2{margin:22px 0 16px}.result-heading p{margin:0;font-size:13px;color:#617889;text-align:right}.drawing-frame{border:1px solid #dfe9ee;border-radius:10px;background:#fbfdfe;overflow:hidden}.drawing-frame svg{display:block;width:100%;height:auto}.result-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:13px}.result-metrics>div{background:#f2f7f9;border:1px solid #e0e9ee;padding:13px 14px;border-radius:8px;min-width:0}.result-metrics span{display:block;color:#607887;font-size:10px;font-weight:700;letter-spacing:.07em}.result-metrics strong{display:block;font-size:24px;line-height:1.25;margin-top:6px;white-space:nowrap}.result-metrics .metric-highlight{background:#ddf6ee;border-color:#a9e5d1}.drawing-note{font-size:12px;color:#607887;margin:13px 0 0}.explore-next{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px;margin-bottom:70px}.lesson-card,.continue-card{padding:27px 30px}.explore-next h2{font-size:26px;margin:14px 0 10px}.explore-next p{font-size:15px;color:#526a7b;line-height:1.6}.explore-next a:not(.button){color:var(--teal);font-weight:650}.check-line{display:flex;justify-content:space-between;gap:16px;border-top:1px solid #e2eaee;padding:12px 0;font-size:14px}.check-line strong{color:var(--teal);text-align:right}.continue-card{background:var(--deep);color:white;border-color:var(--deep)}.continue-card .card-index{color:var(--aqua)}.continue-card p{color:#c5d7e3}.continue-card .button{background:var(--aqua);color:var(--deep);margin-top:8px;border-radius:6px;font-weight:750}.continue-card .button:hover{background:#9ef0d9}.continue-card .share-button{display:block;color:var(--aqua);margin-top:15px}.share-status{min-height:1.4em;font-size:13px!important;margin:0}.explore-footer{padding:22px 0;border-top:1px solid #cedde5;display:flex;justify-content:space-between;gap:15px;color:#617889;font-size:12px}button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--teal);outline-offset:3px}@media(max-width:920px){.explore-intro{grid-template-columns:1fr}.explore-intro-aside{max-width:450px}.lab{grid-template-columns:1fr}.lab-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 18px}.lab-controls .panel-heading,.lab-controls h2,.lab-controls>p,.reset-button{grid-column:1/-1}.lab-controls>p{margin-bottom:15px}.control{min-width:0}}@media(max-width:680px){.explore-wrap{width:calc(100% - 28px)}.explore-header .explore-wrap{min-height:65px}.explore-header nav{gap:12px}.explore-header nav a{font-size:12px}.explore-intro{padding-block:28px 20px;gap:0}.explore-intro h1{font-size:clamp(35px,9vw,52px)}.explore-intro p:not(.explore-kicker){font-size:16px}.lab-controls,.lab-result{padding:19px}.lab-controls{display:block}.lab-controls>p{margin-bottom:18px}.lab h2{font-size:24px}.control{padding:16px 0}.result-heading{display:block}.result-heading h2{margin:15px 0 4px}.result-heading p{text-align:left;margin:0 0 10px}.result-metrics{grid-template-columns:1fr 1fr}.result-metrics .metric-highlight{grid-column:1/-1}.result-metrics strong{font-size:21px}.explore-next{grid-template-columns:1fr;margin-bottom:35px}.lesson-card,.continue-card{padding:22px}.explore-footer{flex-direction:column}.explore-intro-aside{display:none}}

[hidden]{display:none!important}
.practice-toggle{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:20px;padding:12px 14px;border:1px solid #b9ddd1;border-radius:9px;background:#effaf6}.practice-toggle label{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:700;cursor:pointer}.practice-toggle input{width:18px;height:18px;accent-color:var(--teal)}.practice-toggle span{font-size:13px;color:#526a7b}.practice-form{padding:20px 0 4px}.practice-form>p:first-child{font-size:15px;line-height:1.5;color:#526a7b;margin:0 0 16px}.practice-fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.practice-fields label{font-size:14px;font-weight:650;line-height:1.5}.practice-fields input{display:block;width:100%;min-height:44px;margin-top:7px;padding:9px 11px;border:1px solid #aabfca;border-radius:7px;color:var(--deep);background:white}.practice-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:17px}.practice-actions button{min-height:44px;padding:9px 15px;border:1px solid var(--teal);border-radius:7px;background:var(--teal);color:white;font-weight:700;cursor:pointer}.practice-actions button+button{background:white;color:var(--teal)}#practice-feedback{min-height:1.5em;margin:14px 0 0;font-size:14px;font-weight:650;color:var(--teal)}@media(max-width:680px){.practice-toggle{display:block}.practice-toggle span{display:block;margin:5px 0 0 27px}.practice-fields{grid-template-columns:1fr}}
.practice-task{display:grid;gap:6px;margin:0 0 18px;padding:14px 16px;background:#f0f7f9;border-left:3px solid var(--teal);border-radius:6px}.practice-task strong{font-size:15px;color:var(--deep)}.practice-task span{font-size:14px;line-height:1.5;color:#526a7b}.practice-hint{margin:13px 0 0;font-size:14px;line-height:1.5;color:#526a7b}.practice-hint:empty{display:none}.next-task{min-height:44px;margin-top:4px;padding:9px 16px;border:0;border-radius:7px;background:var(--deep);color:white;font-weight:700;cursor:pointer}.next-task:hover{background:#174462}
@media(max-width:520px){.explore-header .nav-guide{display:none}}

.share-channels{display:flex;flex-wrap:wrap;gap:16px;margin:12px 0}.share-channels a{display:inline-flex;align-items:center;min-height:44px;font-size:16px;text-decoration:underline;text-underline-offset:4px}