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10px;border-radius:999px;color:var(--ink-mute);transition:all .15s;background:none;border:none;cursor:pointer}.lang-toggle button.active{background:var(--bg-elevated);color:var(--ink);box-shadow:var(--shadow-soft)}.mode-toggle{display:inline-flex;background:var(--rule-soft);border-radius:999px;padding:3px;font-size:12px}.mode-toggle button{padding:4px 12px;border-radius:999px;color:var(--ink-mute);font-weight:500;letter-spacing:.01em;transition:all .15s;background:none;border:none;cursor:pointer}.mode-toggle button.active{background:var(--orange);color:#fff;box-shadow:var(--shadow-soft)}.page{max-width:1200px;margin:0 auto;padding:0 32px}.page-narrow{max-width:720px;margin:0 auto;padding:0 24px}.footer{margin-top:var(--gap-16);padding:var(--gap-8) 32px;border-top:1px solid var(--rule);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:var(--gap-4);font-size:13px;color:var(--ink-mute)}.footer .lightning{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;color:var(--orange-deep);font-family:var(--font-mono);font-size:12px;text-decoration:none}.footer .lightning,.lesson-row-link:hover>div{background:var(--orange-tint)}@keyframes rise{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.rise{animation:rise .6s cubic-bezier(.2,.8,.2,1) both}.hover\:bg-bg-soft:hover{background-color:var(--color-bg-soft)}.hover\:bg-white:hover{--tw-bg-opacity:1;background-color:rgb(255 255 255/var(--tw-bg-opacity,1))}.hover\:text-text-primary:hover{color:var(--color-text-primary)}.hover\:opacity-75:hover{opacity:.75}.hover\:opacity-90:hover{opacity:.9}.focus\:border-blue:focus{border-color:var(--color-blue)}.focus\:border-orange:focus{border-color:var(--color-orange)}.focus\:border-purple:focus{border-color:var(--color-purple)}.focus\:outline-none:focus{outline:2px solid transparent;outline-offset:2px}.focus\:ring-2:focus{--tw-ring-offset-shadow:var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);--tw-ring-shadow:var(--tw-ring-inset) 0 0 0 calc(2px + var(--tw-ring-offset-width)) var(--tw-ring-color);box-shadow:var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow,0 0 #0000)}.active\:scale-95:active{--tw-scale-x:.95;--tw-scale-y:.95;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.disabled\:cursor-not-allowed:disabled{cursor:not-allowed}.disabled\:opacity-40:disabled{opacity:.4}.disabled\:opacity-50:disabled{opacity:.5}.disabled\:opacity-60:disabled{opacity:.6}@media not all and (min-width:640px){.max-sm\:block{display:block}.max-sm\:grid-cols-1{grid-template-columns:repeat(1,minmax(0,1fr))}.max-sm\:grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.max-sm\:space-y-8>:not([hidden])~:not([hidden]){--tw-space-y-reverse:0;margin-top:calc(2rem * calc(1 - var(--tw-space-y-reverse)));margin-bottom:calc(2rem * var(--tw-space-y-reverse))}}@media (min-width:640px){.sm\:mx-1{margin-left:.25rem;margin-right:.25rem}.sm\:-ml-14{margin-left:-3.5rem}.sm\:-mr-4{margin-right:-1rem}.sm\:h-7{height:1.75rem}.sm\:w-20{width:5rem}.sm\:w-24{width:6rem}.sm\:w-7{width:1.75rem}.sm\:grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.sm\:grid-cols-8{grid-template-columns:repeat(8,minmax(0,1fr))}.sm\:flex-row{flex-direction:row}.sm\:items-center{align-items:center}.sm\:gap-3{gap:.75rem}.sm\:p-5{padding:1.25rem}.sm\:px-4{padding-left:1rem;padding-right:1rem}.sm\:py-2\.5{padding-top:.625rem;padding-bottom:.625rem}.sm\:text-\[11px\]{font-size:11px}.sm\:text-\[12px\]{font-size:12px}.sm\:text-\[16px\]{font-size:16px}.sm\:text-\[9px\]{font-size:9px}.sm\:text-xs{font-size:.75rem;line-height:1rem}.sm\:normal-case{text-transform:none}.sm\:not-italic{font-style:normal}.sm\:\[grid-template-columns\:repeat\(16\2c minmax\(2rem\2c 1fr\)\)\]{grid-template-columns:repeat(16,minmax(2rem,1fr))}}@media (min-width:768px){.md\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.md\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.md\:border-b-0{border-bottom-width:0}.md\:border-r{border-right-width:1px}}