:root{--rotation-accent:#237a5e;--rotation-accent-dark:#155d46;--rotation-ink:#193634;--rotation-muted:#627286;--rotation-stage:#f7f7f4}.rotation-page{--rotation-page-space:64px;--rotation-panel-space:32px;border-radius:32px;width:min(1200px,100%);max-width:1200px;min-width:0;margin:32px 0;padding:var(--rotation-page-space);background:#fff}.rotation-container{width:100%;max-width:1080px;min-width:0;padding-inline:0}[hidden]{display:none!important}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;border:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.rotation-intro{width:100%;max-width:720px;min-width:0;margin:0 auto 20px;text-align:center}.rotation-mode-switch{width:fit-content;margin:0 auto;padding:4px;border-radius:999px;background:var(--rotation-stage);display:grid;grid-template-columns:repeat(2,minmax(112px,1fr));gap:4px}.rotation-mode-option{border:0;border-radius:999px;min-height:44px;padding:0 20px;background:0 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72px);font-weight:720;letter-spacing:-.055em;line-height:1.02;text-wrap:balance}.rotation-stage-hint{max-width:48ch;margin-top:16px;color:var(--rotation-muted);font-size:16px;line-height:1.65;text-wrap:pretty}.rotation-stage-action{border:0;border-radius:999px;min-width:116px;min-height:46px;padding:0 22px;background:radial-gradient(circle,#fff 8%,transparent 100%);color:var(--rotation-accent);font:inherit;font-size:14px;font-weight:700;cursor:pointer;touch-action:manipulation;margin-top:26px}.rotation-workspace{width:min(100%,870px);margin:auto}.rotation-prompt{margin-bottom:18px;text-align:center}.rotation-prompt strong{display:block;color:var(--rotation-ink);font-size:clamp(20px, 3vw, 25px);letter-spacing:-.02em}.rotation-prompt span{margin-top:5px;display:block;color:var(--rotation-muted);font-size:14px}.rotation-question-layout{display:grid;grid-template-columns:minmax(190px,0.8fr) minmax(400px,1.7fr);gap:28px;align-items:stretch}.rotation-option,.rotation-target{border-radius:18px;background:0 0}.rotation-target{min-height:348px;padding:18px;display:flex;flex-direction:column}.rotation-option-label,.rotation-target-label{color:#64766f;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.rotation-target canvas{width:100%;height:310px;display:block;cursor:default;touch-action:pan-y;-webkit-tap-highlight-color:transparent}.rotation-stage[data-mode=match][data-state=test] .rotation-target canvas{cursor:grab;touch-action:none}.rotation-stage[data-mode=match][data-state=test] .rotation-target canvas.is-dragging{cursor:grabbing}.rotation-target canvas:focus-visible{outline:0}.rotation-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.rotation-option{border:0;min-width:0;min-height:180px;padding:10px;color:inherit;cursor:pointer;position:relative;transition:background-color 160ms ease;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.rotation-option canvas{width:100%;height:144px;display:block;pointer-events:none}.rotation-option-label{position:absolute;top:12px;left:14px}.rotation-option-check{border-radius:50%;width:22px;height:22px;background:var(--rotation-accent);display:grid;place-items:center;color:#fff;font-size:13px;font-weight:700;opacity:0;transform:scale(.72);position:absolute;top:10px;right:10px;transition:opacity 150ms ease,transform 150ms ease}.rotation-option.is-selected{background:radial-gradient(circle,rgb(222 228 245 / 92%) 0,rgb(229 233 246 / 48%) 58%,transparent 80%)}.rotation-option.is-selected .rotation-option-check{opacity:1;transform:scale(1)}.rotation-option.is-correct{background:radial-gradient(circle,rgb(221 239 230 / 88%) 0,rgb(229 242 235 / 48%) 58%,transparent 80%)}.rotation-option.is-wrong{background:radial-gradient(circle,rgb(246 229 226 / 82%) 0,rgb(247 237 234 / 42%) 58%,transparent 80%)}.rotation-option.is-correct .rotation-option-check,.rotation-option.is-wrong .rotation-option-check{opacity:1;transform:scale(1)}.rotation-option.is-wrong .rotation-option-check{background:#ad675f}.rotation-option:disabled{cursor:default}.rotation-pair-layout{width:min(100%,720px);margin-inline:auto;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.rotation-pair-shape{border-radius:20px;min-width:0;min-height:322px;padding:18px;background:0 0;display:flex;flex-direction:column}.rotation-pair-shape canvas{width:100%;height:270px;display:block}.rotation-pair-actions{grid-column:1/-1;width:min(100%,360px);margin:4px auto 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.rotation-pair-answer{border:0;border-radius:999px;min-height:48px;padding:0 20px;background:rgb(255 255 255 / 72%);color:var(--rotation-ink);cursor:pointer;font:inherit;font-size:14px;font-weight:700;transition:background-color 160ms ease,color 160ms 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80%)}.rotation-option.is-selected:not(:disabled):hover{background:radial-gradient(circle,rgb(215 223 242 / 96%) 0,rgb(223 228 243 / 48%) 58%,transparent 80%)}.rotation-mode-option:not([aria-pressed=true]):not(:disabled):hover,.rotation-pair-answer:not(:disabled):hover{background:rgb(255 255 255 / 62%);color:var(--rotation-accent-dark)}.rotation-clear-history,.rotation-fullscreen-button,.rotation-history-summary-icon,.rotation-stats-toggle{opacity:0;pointer-events:none;transition:opacity 480ms cubic-bezier(.4, 0, .2, 1),transform 480ms cubic-bezier(.4, 0, .2, 1),color 180ms ease-out,background-color 180ms ease-out}.rotation-history-summary-icon{transition:opacity 480ms cubic-bezier(.4, 0, .2, 1),transform 180ms ease-out}.rotation-clear-history svg{transform:rotate(-8deg);transform-box:fill-box;transform-origin:center;transition:transform 480ms cubic-bezier(.4, 0, .2, 1)}.rotation-clear-history,.rotation-fullscreen-button,.rotation-stats-toggle{transform:translateY(3px)}.rotation-clear-history:focus-visible,.rotation-fullscreen-button:focus-visible,.rotation-history summary:focus-visible .rotation-history-summary-icon,.rotation-stage-shell:hover .rotation-fullscreen-button,.rotation-stage-shell:hover .rotation-stats-toggle,.rotation-stats-toggle:focus-visible,.rotation-stats-toggle[aria-expanded=true],.rotation-stats:hover .rotation-clear-history:not(:disabled),.rotation-stats:hover .rotation-history-summary-icon{opacity:1;pointer-events:auto}.rotation-clear-history:focus-visible svg,.rotation-stats:hover .rotation-clear-history:not(:disabled) svg{transform:rotate(0)}.rotation-clear-history:focus-visible,.rotation-fullscreen-button:focus-visible,.rotation-stage-shell:hover .rotation-fullscreen-button,.rotation-stage-shell:hover .rotation-stats-toggle,.rotation-stats-toggle:focus-visible,.rotation-stats-toggle[aria-expanded=true],.rotation-stats:hover .rotation-clear-history:not(:disabled){transform:translateY(0)}.rotation-fullscreen-button:hover,.rotation-stage-action:hover,.rotation-stats-toggle:hover{color:var(--rotation-accent-dark)}.rotation-clear-history:not(:disabled):hover{background:rgb(83 103 165 / 8%);color:var(--rotation-accent-dark)}}.rotation-stage-shell:-webkit-full-screen,.rotation-stage-shell:fullscreen{border-radius:0;width:100vw;height:100vh;height:100dvh;background:var(--rotation-stage)}.rotation-stage-shell:-webkit-full-screen .rotation-stage,.rotation-stage-shell:fullscreen .rotation-stage{min-height:100vh}.rotation-stage-shell:-webkit-full-screen .rotation-question-layout,.rotation-stage-shell:fullscreen .rotation-question-layout{grid-template-columns:minmax(220px,0.8fr) minmax(460px,1.7fr)}@media (max-width:1023.98px){.rotation-page{--rotation-page-space:40px}.rotation-summary{grid-template-columns:repeat(2,minmax(0,1fr))}.rotation-features .features-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:768px) and (max-width:1263.98px){body.test-page .hero{width:100%;min-width:0;max-width:100%;overflow:hidden}body.test-page .hero-content,body.test-page .hero-content h1,body.test-page .hero-subtitle,body.test-page .hero>.common-container{width:100%;min-width:0;max-width:100%}}@media 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dd{font-size:22px;text-align:right}.rotation-breakdown{grid-template-columns:repeat(6,minmax(0,1fr))}.rotation-progress-overview{grid-template-columns:1fr;gap:18px}.rotation-stage-shell:-webkit-full-screen,.rotation-stage-shell:fullscreen{overflow-y:auto}.rotation-stage-shell:-webkit-full-screen .rotation-stage,.rotation-stage-shell:fullscreen .rotation-stage{min-height:max(100vh,680px)}.rotation-stage-shell[data-mode=pair]:-webkit-full-screen .rotation-stage,.rotation-stage-shell[data-mode=pair]:fullscreen .rotation-stage{min-height:max(100vh,440px)}.rotation-stage-shell:-webkit-full-screen .rotation-question-layout,.rotation-stage-shell:fullscreen .rotation-question-layout{grid-template-columns:minmax(0,1fr)}}@media (max-width:620px){.faq-grid,.rotation-features .features-grid{grid-template-columns:minmax(0,1fr)}.rotation-features .features-subtitle{margin-bottom:28px;font-size:18px}.rotation-features .features-grid{gap:8px}.rotation-features .feature-card{padding:24px 18px}.faq 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