:root{--bg:oklch(97% .02 85);--bg-2:oklch(94% .03 80);--surface:oklch(99% .005 85);--ink:oklch(22% .03 280);--ink-2:oklch(42% .02 280);--ink-3:oklch(62% .02 280);--line:oklch(88% .02 80);--line-2:oklch(82% .02 80);--primary:oklch(55% .2 295);--primary-2:oklch(48% .2 295);--primary-ink:oklch(98% .01 290);--coin:oklch(78% .15 75);--coin-deep:oklch(62% .16 70);--mint:oklch(78% .1 165);--mint-deep:oklch(55% .12 165);--rose:oklch(76% .13 25);--rose-deep:oklch(55% .15 25);--sky:oklch(78% .1 235);--sky-deep:oklch(55% .12 235)}*,:before,:after{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:Space Grotesk,system-ui,sans-serif}button{cursor:pointer;font-family:inherit}input{font-family:inherit}.mono{font-feature-settings:"tnum";font-family:JetBrains Mono,ui-monospace,monospace}.bg-shape{pointer-events:none;z-index:0;border-radius:999px;animation:16s ease-in-out infinite blobFloat;position:fixed}.bg-shape.s1{background:var(--mint);opacity:.3;width:380px;height:380px;top:-120px;left:-100px}.bg-shape.s2{background:var(--coin);opacity:.25;width:280px;height:280px;animation-delay:-4s;bottom:-80px;right:-60px}.bg-shape.s3{background:var(--rose);opacity:.18;width:200px;height:200px;animation-delay:-8s;top:50%;right:15%}.bg-shape.s4{background:var(--sky);opacity:.2;width:160px;height:160px;animation-delay:-12s;bottom:20%;left:12%}@keyframes blobFloat{0%,to{transform:translate(0)scale(1)}33%{transform:translate(30px,-20px)scale(1.05)}66%{transform:translate(-20px,20px)scale(.95)}}.topbar{z-index:10;justify-content:space-between;align-items:center;padding:20px 32px;display:flex;position:fixed;top:0;left:0;right:0}.brand{letter-spacing:-.02em;color:var(--ink);align-items:center;gap:10px;font-size:17px;font-weight:700;text-decoration:none;display:flex}.brand-mark{background:var(--ink);width:32px;height:32px;color:var(--bg);border-radius:9px;flex-shrink:0;place-items:center;font-family:JetBrains Mono,monospace;font-size:15px;font-weight:700;display:grid;transform:rotate(-4deg)}.score-pill{background:var(--surface);border:1px solid var(--line);box-shadow:0 2px 0 var(--line);border-radius:999px;align-items:center;gap:8px;padding:7px 14px;display:inline-flex}.score-pill .num{font-family:JetBrains Mono,monospace;font-size:15px;font-weight:700}.stage{z-index:1;place-items:center;min-height:100vh;padding:88px 24px 120px;display:grid;position:relative}.step-wrap{text-align:center;width:100%;max-width:600px;animation:.45s cubic-bezier(.2,1.2,.3,1) stepIn}@keyframes stepIn{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}.eyebrow{letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);align-items:center;gap:8px;margin-bottom:16px;font-family:JetBrains Mono,monospace;font-size:11px;font-weight:600;display:inline-flex}.eyebrow .dot{background:var(--primary);border-radius:999px;width:8px;height:8px}.headline{letter-spacing:-.03em;color:var(--ink);margin:0;font-size:clamp(32px,6vw,54px);font-weight:700;line-height:1.05}.lead{color:var(--ink-2);max-width:440px;margin:12px auto 0;font-size:clamp(15px,2vw,17px);line-height:1.55}.card{background:var(--surface);border:1px solid var(--line);box-shadow:0 2px 0 var(--line);border-radius:20px}.card-lift{background:var(--surface);border:2px solid var(--line);cursor:pointer;border-radius:18px;padding:20px;transition:transform .18s,box-shadow .18s,border-color .18s;position:relative}.card-lift:hover{box-shadow:0 6px 0 var(--line-2);transform:translateY(-3px)}.card-lift.selected{border-color:var(--primary);box-shadow:0 6px 0 var(--primary-2);transform:translateY(-3px)}.btn{cursor:pointer;border:none;border-radius:13px;align-items:center;gap:8px;padding:13px 22px;font-size:15px;font-weight:600;transition:transform .1s,box-shadow .1s,opacity .1s;display:inline-flex}.btn:hover:not(:disabled){transform:translateY(-1px)}.btn:active:not(:disabled){transform:translateY(2px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--ink);color:var(--bg);box-shadow:0 3px oklch(0% 0 0/.2)}.btn-primary:hover:not(:disabled){box-shadow:0 4px oklch(0% 0 0/.22)}.btn-primary:active:not(:disabled){box-shadow:0 1px oklch(0% 0 0/.2)}.btn-secondary{background:var(--surface);color:var(--ink-2);border:1px solid var(--line);box-shadow:0 2px 0 var(--line)}.btn-secondary:hover:not(:disabled){color:var(--ink);background:var(--bg-2)}.btn-accent{background:var(--primary);color:var(--primary-ink);box-shadow:0 3px 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.fb-title{color:var(--ink);margin-bottom:6px;font-size:17px;font-weight:700}.feedback-panel .fb-sub{color:var(--ink-2);margin-bottom:16px;font-size:13px;line-height:1.5}.reveal-wrap{background:var(--surface);border:1px solid var(--line);text-align:left;box-shadow:0 2px 0 var(--line);border-radius:22px;margin-top:20px;padding:28px}.reveal-wrap .robot-bubble{align-items:flex-start;gap:12px;margin-bottom:16px;display:flex}.reveal-wrap .robot-bubble .rb-icon{flex-shrink:0;margin-top:2px;font-size:24px}.reveal-wrap .robot-bubble .rb-text{color:var(--ink);font-size:16px;font-weight:700;line-height:1.4}.reveal-wrap .concept-box{background:var(--bg-2);border:1px solid var(--line);color:var(--ink-2);border-radius:14px;padding:16px;font-size:14px;line-height:1.6}.complete-badge{background:linear-gradient(135deg, var(--primary), var(--primary-2));border:4px solid var(--primary-2);width:120px;height:120px;box-shadow:0 8px 0 var(--primary-2);border-radius:28px;place-items:center;margin:0 auto 20px;font-size:56px;animation:.55s cubic-bezier(.2,1.4,.3,1) badgePop;display:grid}@keyframes badgePop{0%{opacity:0;transform:scale(.5)rotate(-10deg)}to{opacity:1;transform:none}}.stars-row{justify-content:center;gap:6px;margin:12px 0;display:flex}.star{opacity:0;font-size:28px;animation:.4s cubic-bezier(.2,1.4,.3,1) forwards starPop}@keyframes starPop{0%{opacity:0;transform:scale(0)rotate(-20deg)}to{opacity:1;transform:none}}.concept-chip{letter-spacing:.08em;text-transform:uppercase;color:var(--primary);background:oklch(95% .04 295);border:1px solid oklch(88% .06 295);border-radius:999px;align-items:center;gap:6px;margin-bottom:12px;padding:5px 14px;font-family:JetBrains Mono,monospace;font-size:11px;font-weight:700;display:inline-flex}.progress-bar{background:var(--line);border-radius:999px;height:6px;margin-bottom:16px;overflow:hidden}.progress-fill{background:var(--primary);border-radius:999px;height:100%;transition:width .5s}.hint-link{color:var(--ink-3);cursor:pointer;background:0 0;border:none;margin-bottom:16px;padding:0;font-family:inherit;font-size:13px;text-decoration:underline}.hint-link:hover{color:var(--ink-2)}.hint-box{border:1px solid var(--coin);color:var(--coin-deep);background:oklch(97% .04 75);border-radius:12px;margin-bottom:16px;padding:10px 16px;font-size:13px;font-weight:600}.confetti-piece{pointer-events:none;border-radius:2px;animation:linear forwards confettiFall;position:fixed}@keyframes confettiFall{to{opacity:0;transform:translateY(110vh)rotate(720deg)}}@media (width<=560px){.landing-3col,.landing-2col{grid-template-columns:1fr!important}.landing-tabs{gap:6px!important}.landing-tabs button{padding:10px 6px!important}}@media (width<=420px){.landing-tabs{grid-template-columns:1fr!important}}.float-anim{animation:3s ease-in-out infinite floatItem}@keyframes floatItem{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.welcome-art{width:200px;height:200px;margin:0 auto 24px;position:relative}.welcome-art .blob{border-radius:28px;animation:12s ease-in-out infinite blobSpin;position:absolute}.welcome-art .b1{background:var(--primary);border:3px solid var(--primary-2);--r:-8deg;inset:28px}.welcome-art .b2{background:var(--coin);border:3px solid var(--coin-deep);--r:8deg;animation-delay:-3s;inset:48px 38px}.welcome-art .center{z-index:2;place-items:center;font-size:80px;display:grid;position:absolute;inset:0;transform:rotate(-4deg)}@keyframes blobSpin{0%,to{transform:rotate(var(--r)) scale(1)}50%{transform:rotate(calc(var(--r) * -1)) scale(1.05)}}.marquee-outer{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,#0000 0%,#000 10% 90%,#0000 100%);mask-image:linear-gradient(90deg,#0000 0%,#000 10% 90%,#0000 100%)}.marquee-track{will-change:transform;width:max-content;display:flex}.marquee-left{animation:marquee-left var(--dur,48s) linear infinite}.marquee-right{animation:marquee-right var(--dur,48s) linear infinite}.marquee-outer:hover .marquee-track{animation-play-state:paused}@keyframes marquee-left{0%{transform:translate(0)}to{transform:translate(-50%)}}@keyframes marquee-right{0%{transform:translate(-50%)}to{transform:translate(0)}}@keyframes card-slide-in{0%{opacity:0;transform:translate(48px)rotate(3deg)}to{opacity:1;transform:translate(0)rotate(0)}}.card-slide-in{animation:.4s cubic-bezier(.22,1,.36,1) both card-slide-in}