:root { --bg:#051014; --panel:rgba(8,25,33,.86); --line:rgba(92,255,214,.26); --ink:#eafffb; --muted:#93b8b1; --accent:#5cffd6; --hot:#ff3f8e; }
*,*::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 12% 18%,rgba(92,255,214,.22),transparent 30%),radial-gradient(circle at 84% 80%,rgba(255,63,142,.16),transparent 28%),linear-gradient(135deg,#03080b,#0b2029 55%,#03080b)}
button,a{font:inherit}.app-shell{min-height:100vh;padding:clamp(1rem,3vw,2rem)}.toolbar,.status-panel,.guide{border:1px solid var(--line);background:var(--panel);box-shadow:0 24px 70px rgba(0,0,0,.34);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{display:flex;flex-wrap:wrap;gap:.65rem}button,#goBack{border:1px solid rgba(255,255,255,.14);border-radius:999px;padding:.66rem 1rem;background:linear-gradient(135deg,#067a67,#0f3f55);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;padding:1rem 1.2rem;border-radius:1.2rem;color:var(--muted)}.status-panel strong{color:var(--accent)}.board-wrap{display:grid;grid-template-columns:minmax(0,auto) 260px;justify-content:center;align-items:start;gap:1rem}.circuit-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));width:min(100%,68vh,520px);gap:.45rem}.tile{aspect-ratio:1;border:1px solid rgba(255,255,255,.12);border-radius:.82rem;background:rgba(255,255,255,.06);color:#52716b;font-family:'JetBrains Mono',monospace;font-size:clamp(1.35rem,5vw,2.35rem);font-weight:700;display:grid;place-items:center;cursor:pointer;box-shadow:inset 0 0 20px rgba(0,0,0,.28);transition:transform .18s ease,color .18s ease,box-shadow .18s ease}.tile.fixed{cursor:default}.tile.source{position:relative;color:#fff;font-size:clamp(2.1rem,8vw,4rem);font-weight:900;text-shadow:0 3px 0 rgba(0,0,0,.55),0 0 16px rgba(255,63,142,.85)}.tile.source::before{content:'';position:absolute;inset:12%;border-radius:.75rem;background:linear-gradient(135deg,rgba(255,63,142,.92),rgba(92,255,214,.24));box-shadow:inset 0 0 0 3px rgba(255,255,255,.2);z-index:-1}.tile.source::after{content:'⚡';position:absolute;right:.22em;bottom:.12em;font-size:.38em;line-height:1;color:#ffe66d;text-shadow:0 2px 0 rgba(0,0,0,.5),0 0 8px rgba(255,230,109,.75)}.tile.powered{color:var(--accent);box-shadow:0 0 24px rgba(92,255,214,.35),inset 0 0 24px rgba(92,255,214,.18)}.tile.source.powered{color:#fff}.tile.core.powered{color:#fff;background:radial-gradient(circle,rgba(255,63,142,.55),rgba(92,255,214,.18))}.tile:focus-visible{outline:3px solid var(--accent)}.guide{border-radius:1.2rem;padding:1.2rem;color:var(--muted);line-height:1.5}.guide h2{color:var(--ink);margin-bottom:.5rem}#confettiLayer{position:fixed;inset:0;pointer-events:none}.spark{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,500deg))}}@media(max-width:760px){.toolbar,.status-panel{align-items:flex-start;flex-direction:column}.board-wrap{grid-template-columns:1fr}.circuit-grid{margin:0 auto}.app-shell{padding:.8rem}}

.bottom-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:.65rem;margin:1rem auto 0;border:1px solid var(--line);background:var(--panel);box-shadow:0 24px 70px rgba(0,0,0,.34);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}.board-wrap{gap:.5rem}.circuit-grid{width:min(100%,54vh,330px);gap:.28rem}.tile{border-radius:.58rem;font-size:clamp(1.05rem,6vw,1.8rem)}.guide{padding:.7rem;border-radius:1rem}}

#goBack{display:inline-flex;align-items:center;justify-content:center;text-align:center}
.tile.core{position:relative;box-shadow:0 0 0 2px rgba(92,255,214,.8),inset 0 0 22px rgba(255,63,142,.42),0 0 24px rgba(92,255,214,.42),0 0 38px rgba(255,63,142,.35);animation:core-pulse 1.35s ease-in-out infinite}
.tile.core::after{content:'CORE';position:absolute;top:.28rem;right:.3rem;padding:.08rem .35rem;border-radius:999px;background:rgba(3,13,17,.72);border:1px solid rgba(92,255,214,.9);color:#eafffb;font-size:clamp(.46rem,1.9vw,.62rem);font-weight:900;letter-spacing:.08em;line-height:1;text-shadow:none}
@keyframes core-pulse{0%,100%{transform:scale(1);filter:drop-shadow(0 0 0 rgba(92,255,214,.1))}50%{transform:scale(1.03);filter:drop-shadow(0 0 12px rgba(92,255,214,.7))}}

.tile.source::before{display:none}

.tile.source{font-size:clamp(1.6rem,5.4vw,2.8rem)}