.phd{--phd-full:216px;--phd-min:60px;--phd-max:1200px;--phd-pad:var(--space-9);--phd-pad-narrow:var(--space-5);--t:0;top:calc(var(--phd-min) - var(--phd-full));z-index:5;height:var(--phd-full);background:var(--surface-app);border-bottom:var(--hair) solid var(--border-hair);align-items:flex-end;display:flex;position:sticky;overflow:hidden;container:page-header/inline-size}.phd[data-static]{position:relative;top:auto}.phd[data-compact]{--phd-full:var(--phd-min)}.phd-art{width:68%;opacity:calc(.55 * (1 - var(--t)));pointer-events:none;-webkit-mask-composite:source-in;position:absolute;top:0;bottom:0;right:0;-webkit-mask-image:linear-gradient(90deg,#0000 0%,#000 55%),linear-gradient(#000 50%,#0000 100%);mask-image:linear-gradient(90deg,#0000 0%,#000 55%),linear-gradient(#000 50%,#0000 100%);-webkit-mask-composite:source-in;mask-composite:intersect}.phd-still{background-image:radial-gradient(circle, var(--accent) .9px, transparent 1.25px);background-size:4px 4px;position:absolute;inset:0;-webkit-mask-image:radial-gradient(75% 90% at 62% 40%,#000 0%,#0000 75%);mask-image:radial-gradient(75% 90% at 62% 40%,#000 0%,#0000 75%)}.phd-in{z-index:1;width:100%;min-width:0;max-width:var(--phd-max);padding:0 var(--phd-pad);grid-template-columns:minmax(0,1fr);display:grid;position:relative}.phd-status{min-width:0;min-height:24px;opacity:calc(1 - 2.2 * var(--t));font-family:var(--font-label);letter-spacing:var(--track-label);text-transform:uppercase;color:var(--text-muted);align-items:center;gap:8px;margin-bottom:8px;font-size:10px;font-weight:600;display:flex}.phd-status-text{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.phd-status[data-tone=warn] .phd-status-text{color:var(--warn-text)}.phd-status[data-tone=danger] .phd-status-text{color:var(--danger-text)}.phd-status[data-tone=ok] .phd-status-text{color:var(--ok-text)}.phd-sep{color:var(--text-faint)}.phd-act{all:unset;cursor:pointer;color:var(--text-secondary);white-space:nowrap;flex:none;align-items:center;gap:4px;display:inline-flex}.phd-act:hover{color:var(--accent-text)}.phd-act:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.phd-row{justify-content:space-between;align-items:center;gap:var(--space-5);min-height:var(--phd-min);padding-bottom:calc(24px * (1 - var(--t)));display:flex}.phd-title{align-content:center;min-width:0;display:grid}.phd-heading{align-items:baseline;gap:10px;min-width:0;display:flex}.phd-heading h1{min-width:0}.phd-crumbs{flex:none;min-width:0}.phd-crumbs ol{font-family:var(--font-display);font-size:calc(17px - 3px * var(--t));letter-spacing:var(--track-tight);color:var(--text-muted);align-items:baseline;margin:0;padding:0;font-weight:500;list-style:none;display:flex}.phd-crumbs li{white-space:nowrap;align-items:baseline;display:flex}.phd-crumbs li:after{content:"/";color:var(--text-faint);margin-left:10px;font-weight:400}.phd-crumbs li+li{margin-left:10px}.phd-crumbs a,.phd-crumbs button{all:unset;color:var(--text-muted);cursor:pointer;align-items:center;display:inline-flex}.phd-crumb-back{display:none}.phd-crumbs a:hover,.phd-crumbs button:hover{color:var(--accent-text)}.phd-crumbs a:focus-visible,.phd-crumbs button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:1px}.phd-title h1{font-family:var(--font-display);font-weight:700;font-size:calc(26px - 10px * var(--t));letter-spacing:var(--track-tight);color:var(--text-primary);text-overflow:ellipsis;white-space:nowrap;margin:0;line-height:1.15;overflow:hidden}.phd-desc{height:calc(18px * (1 - var(--t)));margin:calc(6px * (1 - var(--t))) 0 0;opacity:calc(1 - 1.8 * var(--t));font-family:var(--font-code);font-size:var(--text-xs);color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;line-height:18px;overflow:hidden}.phd-actions{align-items:center;gap:var(--space-4);flex:none;display:flex}.phd-skel{background:var(--surface-raised);vertical-align:middle;width:180px;height:10px;animation:ds-lamp-breathe 1.8s var(--ease-out) infinite;border-radius:1px;display:inline-block}.phd-skel-title{width:200px;height:22px}@container page-header (width<=600px){.phd-art{width:100%;opacity:calc(.35 * (1 - var(--t)))}.phd-in{padding:0 var(--phd-pad-narrow)}.phd-title h1{font-size:calc(22px - 6px * var(--t))}.phd-actions>[data-optional],.phd-crumbs li:not(:last-child){display:none}.phd-crumbs li:after{content:none}.phd-crumb-back{display:inline-flex}.phd-crumb-label{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}}@media (prefers-reduced-motion:reduce){.phd-skel{animation:none}}