:root{font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:#e9edf6;background:#090c13}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
body{background:radial-gradient(circle at 15% 0%,#1a2336 0,transparent 34%),#090c13}
.shell{width:min(1240px,100%);margin:auto;padding:clamp(12px,2vw,24px)}
.topbar{display:flex;gap:16px;align-items:end;justify-content:space-between;margin-bottom:20px}
.eyebrow{margin:0 0 4px;color:#a8c7ff;font-size:11px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}
h1{font-size:clamp(25px,3vw,36px);margin:0;line-height:1.1}
.subtitle{color:#a9b4c8;font-size:13px;margin:7px 0 0}
.actions{display:flex;gap:8px;flex-wrap:wrap}
button{font:inherit;color:#eaf0ff;border:1px solid #43516c;border-radius:9px;background:#202a3e;padding:9px 14px;cursor:pointer}
button:hover{background:#30425f}button:focus-visible,input:focus-visible{outline:2px solid #8bc5ff;outline-offset:2px}
button.danger{border-color:#804b56;color:#ffccd2}button.danger:hover{background:#59303b}
.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:16px}
.board-wrap{position:relative;min-width:0;min-height:340px;border:1px solid #38445f;border-radius:15px;background:#111827;display:grid;place-items:center;overflow:hidden;box-shadow:0 16px 44px #0006}
canvas{display:block;width:100%;height:100%;max-height:min(75vh,760px);aspect-ratio:3/2;object-fit:contain;image-rendering:pixelated;touch-action:none;cursor:crosshair}
.status{position:absolute;inset:auto 10px 10px auto;padding:6px 9px;background:#101826e8;border:1px solid #4a5b76;border-radius:7px;font-size:11px;color:#b8c7dd;pointer-events:none}
.toolbox{background:#151d2b;border:1px solid #34425b;border-radius:15px;padding:14px;align-self:start}
.toolbox-head{display:flex;justify-content:space-between;align-items:baseline;gap:8px;margin-bottom:10px}
h2{font-size:15px;margin:0}.toolbox-head span{font-size:12px;color:#b6c9e8}
.palette{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}
.element{display:flex;align-items:center;gap:8px;padding:8px;text-align:left;font-size:12px;min-width:0}
.element[aria-pressed=true]{border-color:#85b9ff;background:#263c59;box-shadow:inset 0 0 0 1px #85b9ff}
.swatch{width:14px;height:14px;flex:none;border-radius:4px;background:var(--swatch);border:1px solid #fff4}
.brush-controls{margin-top:17px}.brush-controls label{display:flex;justify-content:space-between;font-size:12px;font-weight:600;color:#c8d5e9}
input[type=range]{width:100%;accent-color:#83b9ff;margin:12px 0 0}
.hint{font-size:11px;line-height:1.55;color:#9cabc2;margin:15px 0 0}
footer{font-size:11px;line-height:1.5;color:#8d9bb0;margin-top:15px}
a{color:#aacfff}
@media(max-width:820px){.topbar{align-items:start;flex-direction:column}.game-layout{grid-template-columns:1fr}.board-wrap{min-height:220px}.toolbox{width:100%}.palette{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:500px){.palette{grid-template-columns:repeat(3,minmax(0,1fr))}.element{font-size:11px;padding:7px 5px}.actions button{padding:8px 10px}canvas{max-height:58vh}}