.site-header{position:sticky;top:0;z-index:50;width:100%;border-bottom:1px solid var(--line);background:var(--card);box-shadow:0 6px 20px rgba(26,52,126,.07)}.site-nav{align-items:center;gap:18px}.brand-context{display:flex;min-width:0;align-items:center;gap:14px}.brand{display:inline-flex;min-height:44px;align-items:center;flex:none;max-width:none;white-space:nowrap}.tool-context{display:inline-flex;min-height:44px;min-width:0;align-items:center;gap:8px;padding-left:14px;border-left:1px solid var(--line);color:var(--ink);font-size:.86rem;font-weight:800;line-height:1.2;text-decoration:none}.tool-context:hover .tool-context-name,.tool-context:focus-visible .tool-context-name{text-decoration:underline}.tool-context-name{overflow:hidden;max-width:280px;text-overflow:ellipsis;white-space:nowrap}.tool-context-version{flex:none;padding:3px 6px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:.65rem;font-weight:750;letter-spacing:.02em;text-decoration:none}.site-menu{display:flex;flex:none;align-items:center}.site-menu-toggle{display:none;margin:0;padding:0;border:0;align-self:center}.site-menu-toggle>summary{display:none;margin:0;list-style:none}.site-menu-toggle>summary::-webkit-details-marker{display:none}.site-menu>.nav-links{display:flex;width:max-content;min-width:max-content}.nav-action{display:inline-flex;min-height:44px;align-items:center;justify-content:center;gap:7px;padding:8px 9px;border:0;border-radius:8px;background:transparent;color:var(--ink);font:inherit;font-size:.84rem;font-weight:800;text-decoration:none;cursor:pointer}.nav-action:hover,.nav-action:focus-visible,.site-menu-toggle>summary:hover,.site-menu-toggle>summary:focus-visible{background:var(--sage);outline:2px solid transparent}.nav-icon{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.nav-menu-toggle{box-sizing:border-box;width:44px;height:44px;align-items:center;justify-content:center;padding:0;border:1px solid var(--line);border-radius:9px;line-height:0;cursor:pointer}.nav-menu-toggle .nav-icon{display:block;width:22px;height:22px}.tool-changelog-intro{margin-bottom:0}.tool-changelog{margin-top:16px}.tool-changelog summary{min-height:44px;align-content:center;color:var(--accent);font-weight:800;cursor:pointer}.tool-changelog ol{display:grid;gap:10px;margin:14px 0 0;padding-left:22px}.tool-changelog li{padding-left:4px}.tool-changelog strong{display:inline-block;min-width:92px}
@media(max-width:820px){.brand-context{flex:1 1 auto}.tool-context-name{max-width:210px}.site-menu{position:relative;display:flex;flex:none;align-items:center;align-self:center;height:auto;margin:0 0 0 auto}.site-menu-toggle{display:flex}.site-menu-toggle>summary{display:flex}.site-menu-toggle:not([open])+.nav-links{display:none}.site-menu-toggle[open]+.nav-links{display:flex;position:absolute;top:calc(100% + 8px);right:0;width:min(260px,calc(100vw - 24px));min-width:0;align-items:stretch;flex-direction:column;gap:3px;padding:10px;border:1px solid var(--line);border-radius:12px;background:var(--card);box-shadow:var(--shadow)}.site-menu .nav-action{width:100%;justify-content:flex-start;text-align:left}.site-menu form{width:100%}}
@media(max-width:560px){.site-nav{flex-wrap:nowrap;align-items:center}.brand-logo{width:36px;height:36px}.brand-context{gap:10px}.tool-context{gap:6px;padding-left:10px}.tool-context-name{max-width:min(34vw,150px);font-size:.8rem;white-space:nowrap}.tool-context-version{display:none}}
@media(max-width:390px){.brand-context--tool .brand span{display:none}.tool-context-name{max-width:min(50vw,180px)}}

/* Preserve the shared header geometry and menu behavior while applying the brand. */
.site-header { background:var(--ink); color:#fff; border-color:var(--ink); }
.site-header .brand,.site-header .tool-context,.site-header .nav-action { color:#fff; }
.site-header .tool-context,.site-header .nav-menu-toggle { border-color:var(--blue-mid); }
.site-header .tool-context-version { color:var(--accent-soft); border-color:var(--blue-mid); }
.site-header .nav-action:hover,.site-header .nav-action:focus-visible,.site-menu-toggle>summary:hover,.site-menu-toggle>summary:focus-visible { background:var(--accent); }
.site-header :is(a,button,summary):focus-visible { outline:3px solid var(--highlight); outline-offset:3px; }
.site-menu-toggle[open]+.nav-links { background:var(--ink); }