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.n{background:var(--panel-2);width:30px;height:30px;color:var(--accent);box-shadow:inset 0 0 0 1px var(--line);border-radius:50%;place-items:center;font-size:13px;font-weight:800;display:grid}.lesson-row b{margin-bottom:2px;font-size:15px;display:block}.lesson-row small{color:var(--muted);font-size:12px}.lesson-row .chev{color:var(--dim)}.step-head{text-align:center;margin-bottom:4px}.step-head .n{letter-spacing:-.02em;font-size:22px;font-weight:800}.step-head .sub{color:var(--accent);margin-top:2px;font-size:13px;font-weight:700}.teaches{color:var(--muted);margin:14px 0 0;font-size:15px;line-height:1.65}.tip{background:var(--panel);color:var(--muted);border-radius:11px;gap:9px;margin-top:14px;padding:12px 14px;font-size:14px;line-height:1.5;display:flex}.tip b{color:var(--ink)}.alg{background:var(--panel);box-shadow:inset 0 0 0 1px var(--line);border-radius:12px;margin-top:10px;padding:14px}.alg-top{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:7px;display:flex}.alg-top b{font-size:14px}.alg code{background:var(--panel-2);letter-spacing:.04em;color:var(--accent);border-radius:7px;padding:5px 9px;font-size:13px;font-weight:700}.alg small{color:var(--muted);font-size:13px;line-height:1.5;display:block}.alg p{color:var(--dim);margin:8px 0 0;font-size:13px;line-height:1.55}.lesson-nav{grid-template-columns:1fr 1fr;gap:10px;margin-top:18px;display:grid}.stage-strip{gap:4px;margin-bottom:12px;display:flex}.stage-strip i{background:var(--line);border-radius:3px;flex:1;height:4px}.stage-strip i.done{background:var(--accent-dim)}.stage-strip i.now{background:var(--accent)}.coach-card{background:var(--panel);box-shadow:inset 0 0 0 1px var(--line);border-radius:15px;padding:18px}.coach-card .why{color:var(--muted);margin:10px 0 0;font-size:14px;line-height:1.55}@media (max-width:480px){.three-cube{height:250px}.swatches button{width:40px;height:40px}.tabs button{padding:10px 2px;font-size:13px}.net{gap:10px 8px;max-width:320px}}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}