.drv{display:flex;flex-direction:column;gap:.9rem}.drv-rail{list-style:none;margin:0;padding:0;display:flex;gap:0;flex-wrap:wrap}.drv-rail li{flex:1;min-width:5rem;position:relative}.drv-rail li:before{content:"";position:absolute;top:.7rem;left:0;right:0;height:2px;background:var(--color-border);z-index:0}.drv-rail li:first-child:before{left:50%}.drv-rail li:last-child:before{right:50%}.drv-rail li.done:before,.drv-rail li.active:before{background:var(--color-accent-dim)}.drv-rail button{position:relative;z-index:1;width:100%;background:none;border:none;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:.3rem;padding:0}.drv-dot{width:1.5rem;height:1.5rem;border-radius:50%;display:grid;place-items:center;font-family:var(--font-mono);font-size:.78rem;background:var(--color-surface-2);border:1.5px solid var(--color-border-strong);color:var(--color-ink-faint);transition:all .2s}.drv-rail li.done .drv-dot{border-color:var(--color-accent-dim);color:var(--color-accent)}.drv-rail li.active .drv-dot{border-color:var(--color-accent);color:var(--color-accent-strong);background:color-mix(in oklab,var(--color-accent) 12%,var(--color-surface-2))}.drv-rlabel{font-size:.68rem;color:var(--color-ink-faint);text-align:center;line-height:1.2}.drv-rail li.active .drv-rlabel{color:var(--color-ink)}.drv-stage{border:1px solid var(--color-border);border-radius:var(--radius-lg);background:radial-gradient(120% 100% at 50% 0%,var(--color-surface-2),var(--color-canvas));padding:1rem;min-height:200px;display:grid;place-items:center;animation:drvIn .4s ease both}@keyframes drvIn{0%{opacity:0;transform:translateY(8px)}}.drv-stage svg{width:100%;max-width:460px;height:auto}.drv-title{font-size:1.1rem;margin:0 0 .3rem;color:var(--color-ink);letter-spacing:-.01em}.drv-idea{margin:0;color:var(--color-ink-muted);font-size:.92rem;line-height:1.55}.drv-flaw{margin:.7rem 0 0;padding:.6rem .8rem;border-radius:var(--radius);background:color-mix(in oklab,var(--color-changed) 9%,transparent);border:1px solid color-mix(in oklab,var(--color-changed) 35%,transparent);color:var(--color-ink-muted);font-size:.88rem;line-height:1.5;animation:flawIn .4s ease both}@keyframes flawIn{0%{opacity:0;transform:translate(-4px)}}.drv-x{display:inline-block;font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;color:var(--color-changed);margin-right:.5rem}.drv-done{margin:.7rem 0 0;padding:.6rem .8rem;border-radius:var(--radius);background:color-mix(in oklab,var(--color-node-leaf) 9%,transparent);border:1px solid color-mix(in oklab,var(--color-node-leaf) 35%,transparent);color:var(--color-node-leaf);font-size:.88rem;line-height:1.5}.drv-nav{display:flex;align-items:center;gap:.6rem}.drv-btn{background:var(--color-accent);color:#04161b;border:none;border-radius:var(--radius-sm);padding:.5rem .9rem;font-weight:600;font-size:.86rem;cursor:pointer}.drv-btn:hover:not(:disabled){background:var(--color-accent-strong)}.drv-btn.ghost{background:var(--color-surface-2);color:var(--color-ink-muted);border:1px solid var(--color-border)}.drv-btn.ghost:hover:not(:disabled){color:var(--color-ink);border-color:var(--color-border-strong)}.drv-btn:disabled{opacity:.4;cursor:not-allowed}.drv-count{margin-left:auto;font-family:var(--font-mono);font-size:.78rem;color:var(--color-ink-faint)}.dv-box{fill:var(--color-surface);stroke:var(--color-border-strong);stroke-width:1.2}.dv-label{fill:var(--color-ink-muted);font-family:var(--font-mono);font-size:10px}.dv-edge{stroke:var(--color-border-strong);stroke-width:1.4;fill:none}.dv-accent{fill:var(--color-accent)}.dv-hash{fill:color-mix(in oklab,var(--color-hash) 18%,var(--color-surface));stroke:var(--color-hash)}.dv-leaf{fill:color-mix(in oklab,var(--color-node-leaf) 16%,var(--color-surface));stroke:var(--color-node-leaf)}.dv-branch{fill:color-mix(in oklab,var(--color-node-branch) 16%,var(--color-surface));stroke:var(--color-node-branch)}.dv-ext{fill:color-mix(in oklab,var(--color-node-extension) 16%,var(--color-surface));stroke:var(--color-node-extension)}.dv-hot,.dv-hot-edge{stroke:var(--color-changed);stroke-width:2}.dv-txt{fill:var(--color-ink);font-family:var(--font-mono);font-size:11px}.dv-mut{fill:var(--color-ink-faint);font-family:var(--font-mono);font-size:9px}@keyframes dvPulse{0%,to{opacity:1}50%{opacity:.35}}.dv-pulse{animation:dvPulse 1.4s ease-in-out infinite}