*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%;overflow:hidden;background:#0a0b12;font-family:"Segoe UI",system-ui,sans-serif;
  user-select:none;-webkit-user-select:none;touch-action:none;color:#e8eefc}
#app{display:flex;flex-direction:column;height:100vh}

/* top bar */
#topbar{display:flex;align-items:center;gap:8px;padding:8px 10px;background:#12131d;
  border-bottom:1px solid #232838;flex-wrap:wrap}
#title{font-weight:900;letter-spacing:.06em;font-size:20px;
  background:linear-gradient(90deg,#ff6a2b,#ffd23c);-webkit-background-clip:text;background-clip:text;color:transparent}
#curTool{font-size:13px;color:#8da;letter-spacing:.04em;background:#1b2030;padding:4px 12px;border-radius:20px}
.spacer{flex:1}
.tb{cursor:pointer;border:1px solid #2c3346;background:#1b2030;color:#e8eefc;border-radius:10px;
  padding:8px 12px;font-size:13px;font-weight:700;transition:.1s}
.tb:hover{background:#26304a;border-color:#465070}
.tb:active{transform:translateY(1px)}
#clearBtn{border-color:#5a2530;background:#2a1820}
#clearBtn:hover{background:#3a2028}
.tb.hot{border-color:#ff6a2b;background:#3a1f12;color:#ffd23c;font-weight:900}
.tb.hot:hover{background:#4a2616;box-shadow:0 0 14px rgba(255,106,43,.5)}

/* winner banner */
#banner{position:fixed;top:64px;left:50%;transform:translate(-50%,-12px);z-index:30;
  background:rgba(8,8,14,.9);border:2px solid #fff;border-radius:14px;padding:12px 28px;
  font-size:26px;font-weight:900;letter-spacing:.06em;opacity:0;pointer-events:none;
  transition:.3s;text-shadow:0 0 18px currentColor;white-space:nowrap}
#banner.show{opacity:1;transform:translate(-50%,0)}

/* stage / canvas */
#stage{flex:1;display:flex;align-items:center;justify-content:center;background:
  radial-gradient(800px 500px at 50% 30%,#161a28,#0a0b12 75%);overflow:hidden;position:relative}
#world{image-rendering:pixelated;image-rendering:crisp-edges;touch-action:none;
  box-shadow:0 0 50px rgba(0,0,0,.6), inset 0 0 0 1px rgba(255,255,255,.05);border-radius:6px;cursor:crosshair}

/* palette */
#palette{display:flex;gap:6px;padding:8px;background:#12131d;border-top:1px solid #232838;
  overflow-x:auto;align-items:center}
.mat{cursor:pointer;border:2px solid transparent;border-radius:10px;background:#1b2030;
  padding:6px 8px;min-width:62px;display:flex;flex-direction:column;align-items:center;gap:2px;transition:.08s}
.mat:hover{background:#232a3e}
.mat.sel{border-color:#fff;box-shadow:0 0 12px rgba(255,255,255,.35)}
.mat .sw{width:26px;height:26px;border-radius:7px;display:flex;align-items:center;justify-content:center;font-size:16px}
.mat .lb{font-size:10px;color:#aeb8cc;white-space:nowrap}
.brush{display:flex;gap:4px;align-items:center;margin-left:6px;padding-left:8px;border-left:1px solid #2c3346}
.bz{cursor:pointer;width:34px;height:34px;border-radius:9px;border:2px solid #2c3346;background:#1b2030;
  color:#e8eefc;font-weight:800;font-size:12px;display:flex;align-items:center;justify-content:center}
.bz.sel{border-color:#ffd23c;color:#ffd23c}

/* start overlay */
#startOverlay{position:fixed;inset:0;z-index:20;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(700px 500px at 50% 35%,#1a1020,#08070c 80%)}
#startOverlay.hidden{display:none}
.card{text-align:center;max-width:440px;padding:24px}
.card .big{font-size:80px;animation:pulse 1.4s infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.12)}}
.card .name{font-weight:900;font-size:48px;letter-spacing:.1em;margin:4px 0 14px;
  background:linear-gradient(90deg,#ff6a2b,#ffd23c,#ff3b5c);-webkit-background-clip:text;background-clip:text;color:transparent}
.card p{color:#aeb8cc;line-height:1.7;font-size:15px;margin-bottom:20px}
.card b{color:#ffd23c}
#startBtn{cursor:pointer;border:none;border-radius:14px;padding:16px 34px;font-size:18px;font-weight:900;
  letter-spacing:.08em;color:#1a0e06;background:linear-gradient(90deg,#ff8a2b,#ffd23c);box-shadow:0 0 30px rgba(255,160,40,.5)}
#startBtn:active{transform:translateY(2px)}
::-webkit-scrollbar{height:8px;width:8px}::-webkit-scrollbar-thumb{background:#2c3346;border-radius:8px}