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summary{cursor:pointer;font-weight:600;font-family:var(--font-zilla-slab),serif;font-size:16px}.faq-item p{margin:10px 0 0;color:var(--ink-soft);font-size:14px;line-height:1.6}.marketing-footer{border-top:1px solid var(--paper-line);padding:28px 16px}.marketing-footer-inner{max-width:880px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;font-size:13px;color:var(--ink-soft)}.marketing-footer a{color:var(--ink-soft)}.starter-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.starter-chip{border-radius:999px;font-size:13px;padding:8px 14px;background:var(--card);border:1.5px solid var(--paper-line);color:var(--ink)}.starter-chip:hover{border-color:var(--ink-soft);transform:none}.chat-tip{font-size:12px;color:var(--ink-soft);margin-top:6px}.footer-links{display:flex;gap:16px}.draft-page{max-width:640px}.draft-notice{background:var(--gold-bg);border:1px dashed var(--gold);border-radius:8px;padding:14px 16px;font-size:14px;line-height:1.6;color:#8a6112}@media(max-width:480px){.marketing-hero{padding:32px 8px 28px}.marketing-hero h1{font-size:28px}.marketing-subheading{font-size:15px}.tutor-card{align-items:center}.marketing-footer-inner,.tutor-card{flex-direction:column;text-align:center}}.app-bg-wash{position:fixed;inset:0;z-index:0;pointer-events:none;background:radial-gradient(ellipse 640px 520px at 92% 4%,var(--gold-bg),transparent 70%),radial-gradient(ellipse 640px 520px at 4% 96%,var(--green-bg),transparent 70%);opacity:.45}.app-content{position:relative;z-index:1}.chat-with-diagram{display:flex;flex-direction:column;gap:16px;align-items:flex-start}.chat-with-diagram>.chat-main{width:100%;min-width:0}@media(min-width:860px){.chat-with-diagram{flex-direction:row}.chat-with-diagram>.chat-main{flex:1 1 60%}.chat-with-diagram>.diagram-panel{flex:1 1 40%;position:-webkit-sticky;position:sticky;top:20px}}.diagram-panel{width:100%;background:var(--card);border:1.5px solid var(--ink);border-radius:10px;box-shadow:4px 4px 0 var(--shadow);padding:18px;min-height:180px;display:flex;align-items:center;justify-content:center}.diagram-panel-empty{color:var(--ink-soft);font-style:italic;text-align:center;font-size:14px;margin:0}.diagram-panel-content{width:100%;animation:diagram-pop-in .35s ease-out}.diagram-panel-content svg{width:100%;height:auto;display:block}@media(max-width:859px){.diagram-panel-hide-mobile{display:none}}@keyframes diagram-pop-in{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.diagram-panel-glow{animation:diagram-panel-glow-pulse 1s ease-out}@keyframes diagram-panel-glow-pulse{0%{box-shadow:4px 4px 0 var(--shadow),0 0 0 4px var(--gold)}to{box-shadow:4px 4px 0 var(--shadow),0 0 0 4px transparent}}.diagram-region-highlight{stroke:var(--gold)!important;stroke-width:3px!important;filter:drop-shadow(0 0 4px var(--gold));transition:stroke .2s ease,filter .2s ease}