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var(--ink);width:11px;height:18px;position:absolute;top:10%}.chat-backdrop{z-index:200;-webkit-backdrop-filter:blur(7px);backdrop-filter:blur(7px);background:#20201eb8;place-items:center;padding:22px;display:grid;position:fixed;inset:0}.topic-chat{border:var(--border);background:var(--paper);width:min(620px,100%);max-height:min(760px,100vh - 44px);box-shadow:12px 12px 0 var(--ink);border-radius:15px;grid-template-rows:auto minmax(230px,1fr) auto;display:grid;overflow:hidden}.chat-header{--brick-color:var(--yellow);border-bottom:var(--border);background:var(--brick-color);grid-template-columns:auto 1fr auto;align-items:center;gap:12px;padding:17px;display:grid}.chat-topic-icon{border:var(--border);width:44px;height:44px;box-shadow:3px 3px 0 var(--ink);background:#fff;border-radius:9px;place-items:center;display:grid}.chat-header span{letter-spacing:.1em;text-transform:uppercase;margin-bottom:2px;font-size:.68rem;font-weight:900;display:block}.chat-header h2{letter-spacing:-.035em;margin:0;font-family:Archivo Black,sans-serif;font-size:clamp(1.05rem,3vw,1.45rem);line-height:1.1}.chat-header>button{border:2px solid var(--ink);cursor:pointer;background:#fff;border-radius:8px;place-items:center;width:36px;height:36px;display:grid}.chat-messages{background-image:radial-gradient(#20201e1f .7px,#0000 .7px);background-size:8px 8px;flex-direction:column;gap:14px;min-height:0;padding:20px;display:flex;overflow-y:auto}.chat-welcome{text-align:center;background:#fffdf5e0;border:2px dashed #20201e59;border-radius:12px;place-items:center;gap:7px;max-width:330px;margin:auto;padding:24px;display:grid}.chat-welcome p{color:#20201eb3;margin:0;font-size:.84rem}.chat-message{max-width:86%}.chat-message>span{letter-spacing:.08em;text-transform:uppercase;margin:0 7px 4px;font-size:.66rem;font-weight:900;display:block}.chat-message p{border:2px solid var(--ink);box-shadow:3px 3px 0 var(--ink);white-space:pre-wrap;background:#fff;border-radius:11px;margin:0;padding:11px 13px;font-size:.88rem;line-height:1.5}.chat-message.is-user{align-self:flex-end}.chat-message.is-user p{background:var(--blue);color:#fff}.chat-thinking{border:2px solid var(--ink);background:#fff;border-radius:10px;align-self:flex-start;align-items:center;gap:5px;padding:9px 12px;font-size:.76rem;font-weight:800;display:flex}.chat-thinking i{background:var(--blue);border-radius:50%;width:7px;height:7px;animation:.9s ease-in-out infinite chat-bounce}.chat-thinking i:nth-child(2){animation-delay:.12s}.chat-thinking i:nth-child(3){margin-right:4px;animation-delay:.24s}.chat-form{border-top:var(--border);background:#fff;padding:14px 16px 16px}.question-count{color:#20201ead;margin-bottom:8px;font-size:.72rem;font-weight:800}.question-count strong{color:var(--ink)}.chat-error{border:2px solid var(--red);background:#ffe2dc;border-radius:7px;margin:0 0 8px;padding:8px 10px;font-size:.78rem;font-weight:800}.chat-input-row{grid-template-columns:1fr auto;gap:8px;display:grid}.chat-input-row input{border:var(--border);background:var(--paper);border-radius:9px;min-width:0;height:45px;padding:0 13px}.chat-input-row button{border:var(--border);background:var(--yellow);width:45px;height:45px;box-shadow:var(--small-shadow);cursor:pointer;border-radius:9px;place-items:center;display:grid}.chat-input-row button:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}@keyframes explain-pulse{0%,to{filter:brightness()}50%{filter:brightness(1.12)}}@keyframes chat-bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}@media(max-width:800px){.canvas-panel{height:auto;min-height:0}.topbar{align-items:flex-start;padding:12px 14px}.brand-lockup p,.progress-block,.clear-button{display:none}.brand-mark{width:42px;height:37px}.canvas-scroll{padding:26px 15px 38px;overflow:visible}.canvas-scroll:before{display:none}.canvas-intro{align-items:flex-end}.canvas-intro h2{font-size:clamp(2.2rem,13vw,4rem)}.random-button{padding:12px;font-size:.78rem}.prompt-paper{box-shadow:7px 7px 0 var(--ink);padding:28px 18px}.prompt-section{grid-template-columns:36px 1fr;gap:11px;padding:21px 0}.section-number{width:34px;height:34px}.prompt-copy p{font-size:1rem;line-height:2.05}.lego-slot{min-width:122px;margin-inline:3px}.parts-tray{height:auto;min-height:390px;padding:17px 14px 24px}.parts-tray.is-collapsed{min-height:0;padding-block:12px}.builder-shell.tray-is-collapsed .canvas-panel{height:auto}.tray-header{align-items:center}.tray-content{height:auto}.search-box{width:100%}.category-rail{height:260px}.mode-button span{display:none}.mode-button{justify-content:center;width:38px;padding:0}}@media(max-width:520px){.canvas-intro{flex-direction:column;align-items:flex-start}.canvas-intro br{display:none}.random-button{align-self:flex-end;margin-top:-8px}.topbar-actions{gap:7px}.brand-lockup h1{font-size:1.18rem}.category-card{flex-basis:84vw}.topbar .icon-button{display:none}.header-copy-button{padding-inline:10px}.header-copy-button svg{display:none}.tray-header h2{font-size:1.05rem}.tray-toggle span{display:none}.tray-toggle{justify-content:center;width:40px;padding:0}.chat-backdrop{padding:10px}.topic-chat{max-height:calc(100vh - 20px);box-shadow:6px 6px 0 var(--ink);grid-template-rows:auto minmax(180px,1fr) auto}.chat-header{padding:13px}.chat-messages{padding:14px}.chat-message{max-width:94%}}@media(prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.confetti{display:none}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@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}@property --tw-ease{syntax:"*";inherits:false}