.playground-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr));gap:1.5rem;display:grid}.project-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);flex-direction:column;min-width:0;transition:transform .2s,box-shadow .2s,border-color .2s;display:flex;overflow:hidden}.project-card:hover{box-shadow:var(--shadow);border-color:var(--primary-alpha-30);transform:translateY(-3px)}.project-thumbnail{aspect-ratio:16/9;background:var(--surface-soft);color:inherit;place-items:center;text-decoration:none;display:grid;overflow:hidden}.project-thumbnail:focus-visible{outline:3px solid var(--primary-alpha-30);outline-offset:-3px}.project-thumbnail img{object-fit:cover;width:100%;height:100%;transition:transform .3s}.project-card:hover .project-thumbnail img{transform:scale(1.05)}.project-thumbnail--placeholder{background:radial-gradient(circle at 26% 30%, #2563eb29, transparent 34%), radial-gradient(circle at 76% 72%, #14b8a624, transparent 30%), linear-gradient(145deg, var(--surface), var(--surface-soft));border-bottom:1px solid var(--border)}.project-thumbnail-placeholder{width:100%;height:100%;color:var(--primary);background:linear-gradient(115deg,#ffffffbd,#fff3),linear-gradient(#0f172a05,#0f172a0d);position:relative;overflow:hidden}.placeholder-grid{background-image:linear-gradient(#2563eb14 1px,#0000 1px),linear-gradient(90deg,#2563eb14 1px,#0000 1px);background-size:24px 24px;position:absolute;inset:0;mask-image:linear-gradient(135deg,#000 10%,#0000 86%)}.placeholder-track{background:#2563eb2e;height:1px;position:absolute;top:53%;left:14%;right:14%}.placeholder-path{border:2px solid #2563eb9e;border-color:#2563eb9e #14b8a675 #0000 #0000;border-radius:50% 46% 42% 0;width:68%;height:44%;position:absolute;top:30%;left:16%;transform:rotate(-7deg)}.placeholder-node{background:#2563eb;border:2px solid #fff;border-radius:999px;width:.92rem;height:.92rem;position:absolute;box-shadow:0 10px 24px #2563eb47}.placeholder-node-a{top:51%;left:16%}.placeholder-node-b{top:35%;left:48%}.placeholder-node-c{background:#14b8a6;top:50%;right:15%}.placeholder-caption{color:var(--text-muted);text-transform:uppercase;letter-spacing:0;font-size:.68rem;font-weight:700;line-height:1;position:absolute;top:1rem;left:1.1rem}.placeholder-initials{color:#fff;letter-spacing:0;background:#0f172adb;border-radius:12px;place-items:center;min-width:2.95rem;height:2.35rem;font-size:.88rem;font-weight:800;display:inline-grid;position:absolute;bottom:.9rem;right:1rem;box-shadow:0 14px 30px #0f172a2e}.project-card-content{flex-direction:column;flex:1;gap:.75rem;min-width:0;padding:1.25rem;display:flex}.project-card-header{justify-content:space-between;align-items:center;gap:.75rem;display:flex}.project-card-header time{color:var(--text-muted);font-size:.8rem}.project-card-content h3{margin:0;font-size:1.15rem;font-weight:600;line-height:1.3}.project-card-content h3 a{color:var(--text);overflow-wrap:anywhere;text-decoration:none}.project-card-content h3 a:hover{color:var(--primary);text-decoration:none}.project-card-description{color:var(--text-muted);-webkit-line-clamp:2;overflow-wrap:anywhere;-webkit-box-orient:vertical;margin:0;font-size:.9rem;line-height:1.5;display:-webkit-box;overflow:hidden}.project-tag-list{flex-wrap:wrap;gap:.4rem .55rem;margin:.1rem 0 0;padding:0;list-style:none;display:flex}.project-tag-list li{color:var(--text-muted);font-size:.8rem;font-weight:500;line-height:1.3}.project-card-actions{border-top:1px solid var(--border);grid-template-columns:repeat(auto-fit,minmax(min(100%,7rem),1fr));gap:.6rem;margin-top:auto;padding-top:1rem;display:grid}.project-action{border-radius:var(--radius-sm);border:1px solid var(--border);justify-content:center;align-items:center;gap:.45rem;min-height:2.6rem;padding:.55rem .8rem;font-size:.9rem;font-weight:700;text-decoration:none;transition:transform .2s,background .2s,border-color .2s,color .2s,box-shadow .2s;display:inline-flex}.project-action:hover,.project-action:focus-visible{box-shadow:0 10px 20px var(--primary-alpha-12);text-decoration:none;transform:translateY(-1px)}.project-action-page{background:var(--primary);border-color:var(--primary);color:#fff}.project-action-page:hover,.project-action-page:focus-visible{color:#fff;background:#1d4ed8;border-color:#1d4ed8}.project-action-secondary{background:var(--surface-soft);color:var(--text)}.project-action-secondary:hover,.project-action-secondary:focus-visible{border-color:var(--primary);color:var(--primary)}.status-badge{text-transform:uppercase;letter-spacing:.04em;border-radius:999px;align-items:center;padding:.25rem .65rem;font-size:.7rem;font-weight:600;display:inline-flex}.status-active{color:#166534;background:#dcfce7}.status-completed{color:#1e40af;background:#dbeafe}.status-archived{color:#6b7280;background:#f3f4f6}.playground-project{padding:4rem 0}.playground-project--fullscreen{padding:.6rem 0}html.fullscreen-playground-page,body.fullscreen-playground-page{height:100%;overflow:hidden}body.fullscreen-playground-page main{overflow:hidden}.playground-project__container--fullscreen{width:min(1440px,100% - 1rem)}.project-content--fullscreen{font-size:1rem;line-height:1.35}.project-content--fullscreen>*{margin-top:0;margin-bottom:0}.project-header{border-bottom:1px solid var(--border);max-width:70ch;margin:0 auto 2.5rem;padding-bottom:2rem}.project-title-row{flex-wrap:wrap;align-items:center;gap:1rem;margin-bottom:.75rem;display:flex}.project-title{margin:0;font-size:clamp(1.75rem,4vw,2.5rem);font-weight:700;line-height:1.2}.project-meta{color:var(--text-muted);margin-bottom:1rem;font-size:.9rem}.project-links{flex-wrap:wrap;gap:.75rem;margin-bottom:1rem;display:flex}.project-footer{border-top:1px solid var(--border);max-width:70ch;margin:3rem auto 0;padding-top:2rem}html[data-theme=dark] .project-card{background:var(--surface);border-color:#ffffff14}html[data-theme=dark] .project-card:hover{border-color:var(--primary-alpha-30);box-shadow:0 12px 32px #00000080}html[data-theme=dark] .project-thumbnail--placeholder{background:linear-gradient(135deg,#60a5fa29,#0000 44%),linear-gradient(160deg,#101014,#050505)}html[data-theme=dark] .project-thumbnail-placeholder{background:linear-gradient(135deg,#18181bf2,#09090bb8),linear-gradient(135deg,#60a5fa1a,#ffffff05);border-color:#60a5fa38;box-shadow:0 18px 42px #00000061}html[data-theme=dark] .placeholder-grid{background-image:linear-gradient(#60a5fa1f 1px,#0000 1px),linear-gradient(90deg,#60a5fa1f 1px,#0000 1px)}html[data-theme=dark] .placeholder-path{background:linear-gradient(90deg,#60a5fa00,#60a5faad,#60a5fa00)}html[data-theme=dark] .project-action-secondary{color:var(--text);background:#ffffff0f;border-color:#ffffff24}html[data-theme=dark] .project-action-secondary:hover,html[data-theme=dark] .project-action-secondary:focus-visible{border-color:var(--primary);color:var(--primary)}html[data-theme=dark] .status-active{color:#86efac;background:#22c55e33}html[data-theme=dark] .status-completed{color:#93c5fd;background:#3b82f633}html[data-theme=dark] .status-archived{color:#9ca3af;background:#6b728033}@media (width<=640px){.playground-grid{grid-template-columns:1fr}.project-title-row{flex-direction:column;align-items:flex-start;gap:.5rem}}