.grind-header{--nav-paper:#f4f4ef;--nav-ink:#11110f;--nav-muted:#484842;--nav-line:#dcdcd4;--nav-control:#f8f8f3;z-index:50;background:var(--nav-paper);color:var(--nav-ink);border-bottom:1px solid var(--nav-line);font-family:var(--font-product-sans),system-ui,sans-serif;position:sticky;top:0}[data-theme=dark] .grind-header{--nav-paper:#000;--nav-ink:#f4f4ef;--nav-muted:#c1c1b8;--nav-line:#333;--nav-control:#151515}.grind-header-inner{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:32px;width:min(1180px,100% - 48px);min-height:74px;margin-inline:auto;display:grid}.grind-header a{text-decoration:none}.grind-brand{letter-spacing:-.025em;color:var(--nav-ink);white-space:nowrap;flex-shrink:0;justify-self:start;align-items:center;gap:5px;font-size:22px;font-weight:600;line-height:1.15;display:inline-flex}.grind-brand-mark{object-fit:contain;flex-shrink:0;width:64px;height:64px}.grind-desktop-nav{justify-content:center;align-items:center;gap:28px;display:flex}.grind-desktop-nav>a{white-space:nowrap;color:var(--nav-muted);padding-block:13px;font-size:14px;font-weight:500;line-height:20px;transition:color .16s;position:relative}.grind-desktop-nav>a:hover,.grind-desktop-nav>a[aria-current=page]{color:var(--nav-ink)}.grind-desktop-nav>a[aria-current=page]:after{content:"";background:var(--user-accent-border,currentColor);height:1px;position:absolute;bottom:7px;left:0;right:0}[data-user-accent=true] .grind-header :is(.grind-desktop-nav,.grind-mobile-panel) a[aria-current=page]{box-shadow:none;background:0 0;border-radius:0}.grind-header-actions,.grind-utilities{flex-shrink:0;align-items:center;display:flex}.grind-header-actions{justify-self:end;gap:8px}.grind-utilities{border:1px solid var(--nav-line);background:var(--nav-control);border-radius:16px;gap:2px;padding:3px}.grind-header :is(.grind-utility-button,button.penguin-theme-toggle,.paper-wallet-link){box-sizing:border-box;width:44px;height:44px;min-height:44px;color:var(--nav-ink);box-shadow:none;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;padding:5px;transition:background .16s,border-color .16s;display:inline-flex}.grind-header .paper-wallet-link{font-variant-numeric:tabular-nums;gap:3px;width:auto;min-width:60px;padding:5px 9px;font-size:14px;font-weight:500;line-height:1}.grind-header .paper-wallet-logo{object-fit:contain;width:27px;height:27px}.grind-header .grind-profile-button .grind-profile-art,.grind-header button.penguin-theme-toggle .penguin-theme-art{width:32px;height:32px;transition:none;display:block;transform:none}.grind-header .grind-profile-button .reward-avatar{filter:saturate(.65);justify-content:center;align-items:center;display:flex}.grind-header button.penguin-theme-toggle .penguin-theme-badge{background:var(--nav-control);width:11px;height:11px;color:var(--nav-muted);top:3px;right:3px}.grind-header :is(.grind-utility-button,button.penguin-theme-toggle,.paper-wallet-link):hover{border-color:var(--nav-line);background:color-mix(in srgb,var(--nav-ink) 5%,transparent);transform:none}.grind-header .paper-wallet-counter:has(.paper-wallet-pulse){animation:none}.grind-sign-in{white-space:nowrap;padding:12px 10px;font-size:14px;font-weight:500}.grind-sign-in:hover{text-underline-offset:5px;text-decoration:underline!important}.grind-mobile-menu{display:none;position:relative}.grind-mobile-menu summary{list-style:none}.grind-mobile-menu summary::-webkit-details-marker{display:none}.grind-mobile-panel{background:var(--nav-paper);border:1px solid var(--nav-line);border-radius:16px;flex-direction:column;gap:4px;width:280px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 90px);padding:12px;display:flex;position:absolute;top:calc(100% + 8px);right:0;overflow-y:auto;box-shadow:0 12px 32px #0000000d}.grind-mobile-panel>a,.grind-mobile-panel>button{color:var(--nav-muted);text-align:left;align-items:center;gap:8px;padding:12px;font-size:14px;display:flex}.grind-mobile-panel>a[aria-current=page]{color:var(--nav-ink);text-underline-offset:6px;text-decoration:underline}.grind-header :is(a,button,summary):focus-visible{outline:2px solid var(--nav-ink);outline-offset:3px}.grind-header .product-demo{border-top:1px solid var(--nav-line);min-height:24px;color:var(--nav-muted);background:0 0;justify-content:center;align-items:center;gap:8px;padding:3px 16px;font-size:10px;line-height:16px;display:flex}.grind-header .product-demo>span:first-child{color:var(--nav-muted);font-weight:500}@media (max-width:1100px){.grind-header-inner{gap:20px}.grind-desktop-nav{gap:24px}}@media (max-width:960px){.grind-header-inner{justify-content:space-between;display:flex}.grind-desktop-nav{display:none}.grind-mobile-menu{display:block}}@media (max-width:700px){.grind-header-inner{gap:12px;width:calc(100% - 32px);min-height:70px}.grind-brand{font-size:15px}.grind-header-actions{gap:4px}}@media (max-width:440px){.grind-brand span{display:none}.grind-brand{gap:3px}.grind-brand-mark{width:36px;height:36px}.grind-header-inner{gap:8px}.grind-utilities{gap:0;padding:2px}}@media (max-width:360px){.grind-header .product-demo{gap:4px;font-size:9px}}@media (prefers-reduced-motion:reduce){.grind-header *{transition:none!important;animation:none!important}}.reduced-motion .grind-header *{transition:none!important;animation:none!important}.grind-header .grind-utilities .paper-wallet-link{gap:0;width:44px;min-width:44px;height:44px;padding:0}.grind-header .grind-utilities .paper-wallet-link>span:not(.paper-wallet-pulse){display:none}.grind-header .grind-utilities .paper-wallet-logo{width:42px;max-width:none;height:42px;transform:none}.grind-header .grind-utilities :is(.penguin-appearance-image,.profile-portrait,.paper-wallet-logo){width:36px;height:36px}