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span:nth-child(3){width:54%}.site-footer{border-top:1px solid var(--line);min-height:76px}@keyframes spin{to{transform:rotate(360deg)}}@keyframes shimmer{to{background-position:-200% 0}}@media (width<=820px){.hero-grid{grid-template-columns:1fr}.flow-card{max-width:620px}.demo-card{flex-direction:column;align-items:flex-start}}@media (width<=560px){.site-header,.site-footer,.main-content{width:min(100% - 28px,1180px)}.header-note{display:none}.main-content{padding:42px 0 56px}h1{font-size:clamp(2.5rem,13vw,4rem)}.state-panel,.flow-card,.profile-card,.demo-card,.response-card{border-radius:20px;padding:24px}.profile-card__identity{flex-direction:column;align-items:flex-start;margin-top:36px}.user-id{max-width:calc(100vw - 80px)}.site-footer{flex-direction:column;justify-content:center;align-items:flex-start;gap:6px;min-height:92px}}@media 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