:root{--r-btn: 10px;--r-btn-sm: 8px;--r-btn-lg: 12px;--r-card: 12px;--r-section: 16px;--card-gap: clamp(12px, 1.8vw, 26px);--pad-section: clamp(20px, 3vw, 48px);--edge: max( calc(var(--card-gap) + var(--pad-section)), calc((100vw - 1320px)/2) );--nav-h: 68px;--nav-h-stuck: 58px;--nav-top: 12px;--nav-pad-x: 28px;--nav-scroll-travel: clamp(96px, 15svh, 150px);--veil-tail: clamp(14px, 1.5vw, 22px);--fb: var(--brand-font-stack);--fd: var(--brand-font-stack);--fm: var(--brand-mono-stack);--t-meta: 13.5px;--t-sm: 15px;--t-mono: 12px;--t-hover: .22s;--t-state: .42s;--t-press: .12s;--hover-step: 8%;--e-out: cubic-bezier(.16, 1, .3, 1);--e-snap: cubic-bezier(.22, 1, .36, 1);--e-spring: cubic-bezier(.34, 1.3, .64, 1);--okou-rebrand-banner-height: 40px;--announcement-banner-height: var(--okou-rebrand-banner-height)}:root[data-okou-banner=dismissed]{--okou-rebrand-banner-height: 0px;--announcement-banner-height: 0px}.okou-rebrand{position:fixed;inset:0 0 auto;z-index:110;display:grid;grid-template-columns:minmax(32px,1fr) auto minmax(32px,1fr);align-items:center;height:var(--okou-rebrand-banner-height);padding:0 18px;overflow:hidden;background:var(--ink);color:var(--paper);font-family:var(--fb);transition:height var(--t-state) var(--e-out),opacity var(--t-hover) var(--e-snap)}.okou-rebrand__text{grid-column:2;min-width:0;margin:0;overflow:hidden;font-size:13.5px;line-height:1.4;text-align:center;text-overflow:ellipsis;white-space:nowrap}.okou-rebrand__lead{font-weight:600}.okou-rebrand__link{color:inherit;text-decoration-line:underline;text-decoration-color:color-mix(in srgb,currentColor 42%,transparent);text-decoration-thickness:1px;text-underline-offset:2px;transition:text-decoration-color var(--t-hover) var(--e-snap)}.okou-rebrand__link:hover{text-decoration-color:currentColor}.okou-rebrand__link:focus-visible{border-radius:2px;outline:2px solid currentColor;outline-offset:2px}.okou-rebrand__detail{color:color-mix(in srgb,currentColor 72%,transparent)}.okou-rebrand__close{grid-column:3;justify-self:end;display:grid;place-items:center;width:32px;height:32px;margin:0;padding:0;border:0;border-radius:var(--r-btn-sm);background:transparent;color:inherit;cursor:pointer;transition:background var(--t-hover) var(--e-snap)}.okou-rebrand__close:hover{background:color-mix(in srgb,currentColor 12%,transparent)}.okou-rebrand__close svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-linecap:round;stroke-width:1.5}:root[data-okou-banner=dismissed] .okou-rebrand{visibility:hidden;opacity:0;pointer-events:none}@media(max-width:640px){:root{--okou-rebrand-banner-height: 44px}:root[data-okou-banner=dismissed]{--okou-rebrand-banner-height: 0px}.okou-rebrand{grid-template-columns:44px minmax(0,1fr) 44px;padding:0 8px}.okou-rebrand__text{font-size:13px}.okou-rebrand__detail{display:none}.okou-rebrand__close{width:44px;height:44px}}@media(max-width:960px){:root{--card-gap: 12px;--pad-section: clamp(16px, 2.8vw, 24px);--nav-pad-x: 16px;--nav-h: 60px;--nav-h-stuck: 54px}}@supports (animation-timeline: scroll()){.okou-home .nav,.okou-site-chrome .nav{animation:okou-nav-scroll-gather linear both;animation-timeline:scroll(root block);animation-range:0 var(--nav-scroll-travel)}.okou-home .nav .wm,.okou-site-chrome .nav .wm{animation:okou-wordmark-scroll-gather linear both;animation-timeline:scroll(root block);animation-range:0 var(--nav-scroll-travel)}.okou-home .nav .wm__g[style],.okou-site-chrome .nav .wm__g[style]{animation:okou-wordmark-glyph-scroll-gather linear both;animation-timeline:scroll(root block);animation-range:0 var(--nav-scroll-travel);animation-timing-function:var(--g-scroll-ease, linear)}}@keyframes okou-nav-scroll-gather{0%{top:var(--okou-rebrand-banner-height);right:0;left:0;height:var(--nav-h);border-radius:0}to{top:calc(var(--okou-rebrand-banner-height) + var(--nav-top));right:max(var(--card-gap),calc(50% - var(--nav-w-stuck, 100vw) / 2));left:max(var(--card-gap),calc(50% - var(--nav-w-stuck, 100vw) / 2));height:var(--nav-h-stuck);border-radius:var(--r-section)}}@keyframes okou-wordmark-scroll-gather{0%{width:var(--wm-w-full)}to{width:var(--wm-w-mark)}}@keyframes okou-wordmark-glyph-scroll-gather{0%{opacity:1;transform:none}62%{opacity:0}to{opacity:0;transform:translate(calc(var(--tuck) * 1px))}}@media(prefers-reduced-motion:reduce){.okou-home .nav,.okou-site-chrome .nav,.okou-home .nav .wm,.okou-site-chrome .nav .wm,.okou-home .nav .wm__g[style],.okou-site-chrome .nav .wm__g[style]{animation:none}}.btn,.okou-cta,.btn-primary-large,.btn-secondary-large{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid transparent;border-radius:var(--r-btn);background:var(--fill, transparent);font-family:var(--fb);font-variant-numeric:normal;font-weight:500;font-size:var(--t-meta);line-height:1.55;letter-spacing:normal;text-transform:none;text-decoration:none;cursor:pointer;transition:background var(--t-hover) var(--e-snap),color var(--t-hover) var(--e-snap),border-color var(--t-hover) var(--e-snap),transform var(--t-hover) var(--e-snap)}.btn--sm{height:38px;padding:0 18px;border-radius:var(--r-btn)}.btn--lg,.okou-cta,.btn-primary-large,.btn-secondary-large{padding:12px 24px;font-size:var(--t-sm);border-radius:var(--r-btn-lg)}.btn--dark,.okou-cta,.btn-primary-large{--fill: var(--accent);border-color:var(--fill);color:var(--accent-ink)}.btn--ghost,.okou-cta--ghost,.btn-secondary-large{--fill: var(--wash-2);border-color:transparent;color:var(--ink)}.btn:hover,.okou-cta:hover,.btn-primary-large:hover,.btn-secondary-large:hover{--fill-hover: color-mix( in srgb, var(--state-ink) var(--hover-step), var(--fill) );background:var(--fill-hover);border-color:var(--fill-hover)}.btn:active,.okou-cta:active,.btn-primary-large:active,.btn-secondary-large:active{transform:translateY(0) scale(.985);transition-duration:var(--t-press)}@media(pointer:coarse),(max-width:1000px){.btn--sm{height:44px}}.btn img{object-fit:contain}.btn--ghost img{width:16px;height:16px}.btn--ghost:hover img{filter:none}