:root{--bg:#101827;--panel:rgba(15,23,42,.88);--ink:#f8fafc;--muted:#a6b4c8;--accent:#38bdf8;--green:#22c55e;--wall:#334155}*,*::before,*::after{box-sizing:border-box}body{margin:0;min-height:100vh;min-height:100dvh;font-family:Inter,system-ui,sans-serif;color:var(--ink);background:radial-gradient(circle at 15% 15%,rgba(56,189,248,.24),transparent 30%),radial-gradient(circle at 85% 85%,rgba(34,197,94,.18),transparent 28%),linear-gradient(135deg,#020617,#111827 60%,#020617)}button,a{font:inherit}.app-shell{min-height:100vh;padding:clamp(1rem,3vw,2rem)}.toolbar,.status-panel,.program-panel{border:1px solid rgba(255,255,255,.12);background:var(--panel);box-shadow:0 26px 70px rgba(0,0,0,.36);backdrop-filter:blur(14px)}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;border-radius:1.4rem;padding:1rem 1.2rem}.eyebrow{margin:0;color:var(--accent);font-size:.76rem;font-weight:800;letter-spacing:.2em;text-transform:uppercase}h1,h2,p{margin:0}h1{font-size:clamp(2rem,6vw,3.5rem);line-height:1}.toolbar-actions,.command-buttons,.action-row{display:flex;flex-wrap:wrap;gap:.6rem}button,#goBack{border:1px solid rgba(255,255,255,.14);border-radius:999px;padding:.66rem .95rem;background:#0f172a;color:var(--ink);font-weight:800;text-decoration:none;cursor:pointer}button:hover,button:focus-visible,#goBack:hover,#goBack:focus-visible{outline:none;transform:translateY(-2px);border-color:var(--accent)}.status-panel{display:flex;justify-content:space-between;gap:1rem;margin:1rem 0;border-radius:1.2rem;padding:1rem 1.2rem;color:var(--muted);font-weight:700}.status-panel strong{color:var(--accent)}.runner-layout{display:grid;grid-template-columns:minmax(300px,1fr) 330px;gap:1rem}.grid{display:grid;grid-template-columns:repeat(6,1fr);gap:.45rem}.cell{aspect-ratio:1;border-radius:.8rem;background:rgba(255,255,255,.08);display:grid;place-items:center;font-size:clamp(1.5rem,6vw,2.6rem);border:1px solid rgba(255,255,255,.08)}.cell.wall{background:var(--wall);box-shadow:inset 0 0 20px rgba(0,0,0,.25)}.cell.goal{background:rgba(34,197,94,.22);border-color:rgba(34,197,94,.5)}.robot{display:inline-block;transform:rotate(var(--angle,0deg));filter:drop-shadow(0 8px 10px rgba(0,0,0,.35))}.program-panel{border-radius:1.2rem;padding:1.2rem}.program-panel h2{margin-bottom:.8rem}.command-buttons{margin-bottom:1rem}.command-buttons button{background:linear-gradient(135deg,#075985,#0f172a)}.program-list{min-height:150px;margin:0 0 1rem;padding-left:1.5rem;color:var(--muted);font-family:'JetBrains Mono',monospace}.program-list li{margin:.25rem 0}.action-row button:first-child{background:linear-gradient(135deg,var(--green),#166534)}#confettiLayer{position:fixed;inset:0;pointer-events:none}.bit{position:absolute;top:-8vh;width:12px;height:20px;border-radius:999px;background:var(--accent);animation:fall var(--duration,1600ms) linear forwards}@keyframes fall{to{opacity:0;transform:translate3d(var(--x,0),112vh,0) rotate(var(--spin,600deg))}}@media(max-width:820px){.toolbar,.status-panel{align-items:flex-start;flex-direction:column}.runner-layout{grid-template-columns:1fr}.app-shell{padding:.8rem}}

.robot-svg{width:82%;height:82%;display:block;filter:drop-shadow(0 8px 10px rgba(0,0,0,.45));transform:rotate(var(--robot-angle,0deg));transition:transform .16s ease}
.bottom-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:.6rem;margin:1rem auto 0;border:1px solid rgba(255,255,255,.12);background:var(--panel);box-shadow:0 26px 70px rgba(0,0,0,.36);backdrop-filter:blur(14px);border-radius:1.2rem;padding:1rem}@media(max-width:760px){.bottom-actions{align-items:stretch;flex-direction:column}}
@media(max-width:560px){.app-shell{padding:.5rem}.toolbar{padding:.55rem .7rem;border-radius:1.1rem}.eyebrow{display:none}h1{font-size:clamp(1.45rem,7vw,2rem)}.status-panel{gap:.45rem;margin:.5rem 0;padding:.6rem .7rem;border-radius:1rem}.runner-layout{gap:.5rem}.grid{gap:.3rem}.cell{border-radius:.6rem}.program-panel{padding:.7rem;border-radius:1rem}.command-buttons,.action-row{gap:.4rem}}