.app-shell__header{z-index:5;justify-content:space-between;align-items:center;gap:16px;height:88px;position:relative}body:has(.interior-page) .app-shell__header{z-index:5;justify-content:space-between;align-items:center;gap:16px;height:88px;position:relative}.app-shell__brand{--brand-wordmark-width:calc(4.8125em + 27px);letter-spacing:-.7px;white-space:nowrap;align-self:center}body:has(.interior-page) .app-shell__brand{--brand-wordmark-width:calc(4.8125em + 27px);letter-spacing:-.7px;white-space:nowrap;align-self:center}.header-account{font-size:var(--landing-body);flex-shrink:0;align-items:center;gap:16px;line-height:1.55;display:flex;position:relative}.header-avatar{min-width:60px;height:44px;color:inherit;background:0 0;border:1px solid #748f8e;border-radius:2px;justify-content:center;align-items:center;gap:8px;padding:10px;display:flex}.header-avatar[aria-expanded=true]{background:#f4efdf;border-color:#273f43}.header-text-link{text-underline-offset:5px;white-space:nowrap;align-items:center;min-height:44px;text-decoration:underline;display:flex}.header-menu{z-index:20;background:#f4efdf;border:1px solid #748f8e;border-radius:2px;width:258px;max-width:calc(100vw - 48px);padding:8px;position:absolute;top:calc(100% + 12px);right:0;box-shadow:0 3px 5px #273f430b,0 14px 22px #273f4318}.header-menu-row{width:100%;min-height:48px;color:inherit;font:inherit;text-align:left;background:0 0;border:0;border-radius:2px;justify-content:space-between;align-items:center;gap:8px;padding:12px;text-decoration:none;display:flex}.header-menu-row:hover{background:#fffdf6}.header-menu-row:disabled{color:#4a6064;opacity:1}.header-menu-rule{border-top:1px solid #273f4329;margin:4px 12px}.header-error{color:#94553f;background:#f5e8de;border-left:2px solid #94553f;margin:4px 12px 12px;padding:12px;font-size:13px;line-height:1.55}.header-spinner{border:2px solid #748f8e;border-top-color:#273f43;border-radius:50%;flex-shrink:0;width:16px;height:16px;animation:1s linear infinite header-spin}.app-shell__header :focus-visible{outline-offset:2px;outline:2px solid #273f43}@keyframes header-spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.header-spinner{animation:none}}@media (width>=301px){body:has(.chemistry-body) .app-shell__header{height:77px;padding-top:6px}}@media (width>=900px){.app-shell__header{height:112px}body:has(.interior-page) .app-shell__header{height:112px}body:has(.chemistry-body) .app-shell__header{height:100px}.header-menu{width:280px}}@media (width<=300px){.app-shell__header{flex-wrap:wrap;height:auto;min-height:88px;padding-block:16px}body:has(.interior-page) .app-shell__header{flex-wrap:wrap;height:auto;min-height:88px;padding-block:16px}.app-shell__brand{white-space:normal;min-width:0}body:has(.interior-page) .app-shell__brand{white-space:normal;min-width:0}.header-account{margin-left:auto}}.header-menu[hidden]{display:none}