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8px}.round-progress{display:flex;gap:6px}.round-progress__dot{width:10px;height:10px;border-radius:50%;background:var(--surface-2)}.round-progress__dot[data-state=done-correct]{background:var(--correct)}.round-progress__dot[data-state=done-incorrect]{background:var(--incorrect)}.round-progress__dot[data-state=current]{background:var(--accent);outline:2px solid var(--accent);outline-offset:2px}.round-theme{color:var(--text-dim);font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;margin:0 0 4px}.round-instructions{color:var(--text);font-size:.95rem;margin:0 0 12px}.compare-grid{display:grid;gap:12px;grid-template-columns:1fr}.compare-grid[data-layout=side-by-side]{grid-template-columns:1fr 1fr}@media (max-width: 640px){.compare-grid{grid-template-columns:1fr!important}}.image-card{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--surface);border:2px solid transparent}.image-card[data-selected=true]{border-color:var(--accent)}.image-card[data-reveal=correct]{border-color:var(--correct)}.image-card[data-reveal=incorrect]{border-color:var(--incorrect)}.image-card__frame{width:100%;aspect-ratio:var(--card-aspect-ratio, 1 / 1);background:var(--surface-2);position:relative}.image-card__frame img{width:100%;height:100%;object-fit:cover}.image-card__label{position:absolute;bottom:8px;left:8px;background:#0000008c;color:#fff;font-size:.75rem;padding:4px 8px;border-radius:999px}.image-card__zoom-hint{position:absolute;top:8px;right:8px;z-index:2;display:inline-flex;align-items:center;gap:5px;background:#000000a6;color:#fff;font-size:.75rem;font-weight:600;padding:6px 11px;border-radius:999px;cursor:pointer;transition:background-color .15s ease,transform .15s ease}.image-card__zoom-hint:hover{background:var(--accent);transform:scale(1.06)}.image-card__zoom-hint svg{flex-shrink:0}.reveal-panel{margin-top:16px;padding:16px;border-radius:var(--radius);background:var(--surface);min-height:96px}.reveal-panel__actions{margin-top:12px;display:flex;justify-content:flex-end}.next-round-btn{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:10px 18px;font-weight:600}.zoom-modal{position:fixed;inset:0;background:#000000d9;display:none;align-items:center;justify-content:center;z-index:1000;touch-action:none}.zoom-modal[data-open=true]{display:flex}.zoom-modal__stage{width:min(92vw,900px);aspect-ratio:1 / 1;overflow:hidden;position:relative;border-radius:var(--radius);background:var(--surface-2)}.zoom-modal__stage img{width:100%;height:100%;object-fit:contain;transform-origin:center center;will-change:transform}.zoom-modal__close{position:absolute;top:16px;right:16px;background:#ffffff1f;color:#fff;border:none;border-radius:999px;width:40px;height:40px;z-index:1001}.zoom-modal__hotspot{position:absolute;width:22px;height:22px;border-radius:50%;border:2px solid var(--incorrect);background:#f8717140;transform:translate(-50%,-50%)}.ad-slot{background:var(--surface);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--text-dim);font-size:.7rem;overflow:hidden}.ad-rail{display:none}@media (min-width: 900px){.ad-rail{display:block;position:sticky;top:16px}}.ad-anchor-mobile{position:fixed;bottom:0;left:0;right:0;z-index:900;display:flex;justify-content:center}.docked-video{position:fixed;bottom:72px;right:12px;width:160px;aspect-ratio:16 / 9;border-radius:10px;overflow:hidden;background:#000;box-shadow:0 4px 24px #0006;z-index:800;transition:opacity .2s ease}.docked-video[data-hidden=true]{opacity:0;pointer-events:none}@media (min-width: 900px){.docked-video{bottom:24px;right:24px;width:220px}}.interstitial-overlay{position:fixed;inset:0;background:#000;display:none;align-items:center;justify-content:center;z-index:1100}.interstitial-overlay[data-open=true]{display:flex}.interstitial-overlay__frame{width:min(92vw,640px);aspect-ratio:16 / 9;background:var(--surface-2)}.interstitial-overlay__skip{position:absolute;top:16px;right:16px;background:#ffffff26;color:#fff;border:none;border-radius:999px;padding:8px 14px;font-size:.85rem}.interstitial-overlay__skip[disabled]{opacity:.5}.about-section{border-top:1px solid var(--surface-2);margin-top:32px;padding:48px 16px}.about-section__inner{max-width:640px;margin:0 auto}.about-section__heading{font-size:clamp(1.5rem,4vw,2.1rem);line-height:1.25;margin:0 0 20px;font-weight:700;letter-spacing:-.01em}.about-section__body p{color:var(--text-dim);font-size:1rem;line-height:1.7;margin:0 0 16px}.about-section__body p:last-child{margin-bottom:0}.about-section__form{display:flex;gap:8px;flex-wrap:wrap;margin-top:28px}.about-section__form input{flex:1;min-width:200px;padding:10px 12px;border-radius:10px;border:1px solid var(--surface-2);background:var(--surface);color:var(--text);font-size:.95rem}.about-section__form input:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.about-section__status{margin:10px 0 0;color:var(--text-dim);font-size:.85rem}