:root{--ink:#20223b;--cream:#fffaf2;--paper:#fff;--yellow:#ffd45c;--coral:#ff6b5f;--mint:#9fe0c3;--lilac:#c8b7ff;--muted:#5f627a;--line:rgba(32,34,59,.2);--side:260px}*{box-sizing:border-box}html{background:var(--cream);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",sans-serif}body{margin:0;line-height:1.5;background:radial-gradient(circle at 80% 0,#efe9ff,transparent 32rem),var(--cream)}button,input{font:inherit}button,a{min-height:44px}:focus-visible{outline:4px solid var(--coral);outline-offset:3px}.skip{position:fixed;z-index:100;left:10px;top:-80px;padding:10px;background:var(--yellow);color:var(--ink)}.skip:focus{top:10px}.app{display:grid;grid-template-columns:var(--side) minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;padding:18px;background:var(--ink);color:#fff;transition:width .2s}.brand{display:flex;align-items:center;gap:10px;font-size:21px;margin-bottom:20px}.brand>span{font-size:30px}.collapse,.nav-item{width:100%;display:flex;align-items:center;gap:12px;border:0;border-radius:14px;padding:11px;background:transparent;color:#fff;text-align:left;cursor:pointer}.collapse{margin-bottom:10px;background:#30334e}.nav-item.active,.nav-item:hover{background:#454968}.nav-item span:first-child{font-size:22px}.report{display:block;margin-top:30px;color:#fff}.app.collapsed{--side:76px}.app.collapsed .nav-text,.app.collapsed .brand strong{display:none}.app.collapsed .collapse span:first-child{transform:rotate(180deg)}.main{min-width:0;padding:clamp(16px,3vw,36px)}.topbar,.path-head,.guide-card,.canvas-actions{display:flex;justify-content:space-between;align-items:center;gap:18px}.topbar h1{margin:0;font-size:clamp(28px,4vw,48px);line-height:1.05}.kicker{margin:0 0 5px;color:#a8322c;text-transform:uppercase;letter-spacing:.1em;font-size:12px;font-weight:900}.button{display:inline-flex;align-items:center;justify-content:center;border:2px solid var(--ink);border-radius:999px;padding:9px 16px;background:var(--yellow);color:var(--ink);font-weight:850;text-decoration:none;cursor:pointer}.button.secondary{background:#fff}.mobile-menu{display:none}.lesson-path,.workspace,.grownups{margin-top:28px}.lesson-path{padding:22px;border:2px solid var(--ink);border-radius:24px;background:rgba(255,255,255,.75)}.path-head h2,.guide-card h2,.toolbox h2{margin:0}.lesson-cards{display:grid;grid-template-columns:repeat(5,minmax(150px,1fr));gap:10px;margin-top:18px;overflow-x:auto;padding-bottom:4px}.lesson-card{min-height:150px;padding:14px;border:2px solid var(--ink);border-radius:18px;background:#fff;text-align:left;cursor:pointer}.lesson-card.active{background:var(--yellow);box-shadow:0 4px 0 var(--ink)}.lesson-card.done{background:#e5f7ee}.lesson-card b,.lesson-card span{display:block}.lesson-card span{margin-top:6px;color:var(--muted);font-size:13px}.guide-card{padding:18px 20px;border:3px solid var(--ink);border-radius:22px 22px 0 0;background:var(--mint)}.guide-card p{margin:5px 0}.step-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.studio-shell{display:grid;grid-template-columns:230px minmax(0,1fr);border:3px solid var(--ink);border-top:0;border-radius:0 0 22px 22px;background:#fff;overflow:hidden}.toolbox{padding:18px;border-right:2px solid var(--line);background:#f7f3ff}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:14px 0}.tool{display:grid;place-items:center;gap:2px;min-height:68px;border:2px solid var(--ink);border-radius:14px;background:#fff;cursor:pointer}.tool span{font-size:12px;font-weight:800}.tool.active,.tool[aria-pressed=true]{background:var(--yellow);box-shadow:0 3px 0 var(--ink)}.tool.suggested{animation:callout 1s ease-in-out infinite;outline:5px solid var(--coral)}fieldset{border:0;padding:0;margin:18px 0}legend{font-weight:850}.colors{display:flex;flex-wrap:wrap;gap:7px;margin-top:8px}.color{width:42px;height:42px;border:3px solid #fff;border-radius:50%;box-shadow:0 0 0 2px var(--ink);cursor:pointer}.color.active{box-shadow:0 0 0 4px var(--ink)}.range{display:grid;gap:7px;font-weight:800}.canvas-area{min-width:0;padding:16px;background:#e7f6ff}.canvas-wrap{position:relative;max-width:1000px;margin:auto;aspect-ratio:10/7;border:3px solid var(--ink);border-radius:18px;background:#fff;box-shadow:0 7px 0 var(--ink);overflow:hidden}canvas{display:block;width:100%;height:100%;touch-action:none;cursor:crosshair}.canvas-actions{max-width:1000px;margin:16px auto 0;justify-content:flex-start;flex-wrap:wrap}.save-state{margin-left:auto;color:var(--muted);font-size:13px}.grownups{max-width:760px;padding:28px;border:3px solid var(--ink);border-radius:24px;background:#fff}.backdrop{position:fixed;inset:0;z-index:40;background:rgba(32,34,59,.55)}@keyframes callout{50%{transform:translateY(-3px)}}@media(max-width:950px){.lesson-cards{grid-template-columns:repeat(5,170px)}.studio-shell{grid-template-columns:190px minmax(0,1fr)}}@media(max-width:780px){.app{display:block}.sidebar{position:fixed;z-index:50;left:0;top:0;width:min(300px,86vw);transform:translateX(-105%);box-shadow:12px 0 30px rgba(0,0,0,.25)}.sidebar.open{transform:none}.app.collapsed .nav-text,.app.collapsed .brand strong{display:inline}.collapse{display:none}.mobile-menu{display:inline-flex;border:2px solid var(--ink);border-radius:999px;padding:8px 14px;background:#fff;font-weight:800}.topbar{align-items:flex-start;flex-wrap:wrap}.studio-shell{display:block}.toolbox{border-right:0;border-bottom:2px solid var(--line)}.tool-grid{grid-template-columns:repeat(4,1fr)}.guide-card{align-items:flex-start;flex-direction:column}.step-actions{justify-content:flex-start}.canvas-area{padding:10px}.save-state{width:100%;margin:0}.path-head{align-items:flex-start;flex-direction:column}}@media(max-width:440px){.main{padding:10px}.topbar h1{font-size:31px}.lesson-path{padding:15px}.tool-grid{grid-template-columns:repeat(3,1fr)}.guide-card{padding:15px 12px}.button{padding:8px 12px}.canvas-wrap{border-radius:10px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}