* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:'Segoe UI',sans-serif; background:#0f0f23; color:#fff; min-height:100vh; display:flex; justify-content:center; align-items:center; }
.wrapper { text-align:center; padding:1rem; position:relative; max-width:750px; width:100%; }
.top-bar { display:flex; justify-content:space-between; align-items:center; margin-bottom:1rem; gap:1rem; flex-wrap:wrap; }
.back-btn { color:#888; text-decoration:none; font-size:0.9rem; transition:color .2s; background:#2a2a5e; padding:0.3rem 0.7rem; border-radius:6px; }
.back-btn:hover { color:#4cff72; }
.top-bar h1 { font-size:1.4rem; }
.score-board { display:flex; gap:1rem; font-size:0.9rem; color:#aaa; }
.score-board strong { color:#4cff72; }
.hidden { display:none !important; }

/* Level Select */
#level-select h2 { font-size:1.3rem; margin-bottom:1rem; color:#f0c040; }
#level-grid { display:grid; grid-template-columns:repeat(5,1fr); gap:0.6rem; max-width:400px; margin:0 auto; }
.level-tile { background:#1a1a3e; border:2px solid #2a2a5e; border-radius:10px; padding:0.6rem 0.3rem; cursor:pointer; transition:transform .2s,border-color .2s; display:flex; flex-direction:column; align-items:center; gap:0.2rem; }
.level-tile:hover { transform:translateY(-2px); border-color:#f0c040; }
.level-tile.locked { opacity:0.4; cursor:default; }
.level-tile.locked:hover { transform:none; border-color:#2a2a5e; }
.level-tile .lv-num { font-size:1.1rem; font-weight:700; }
.level-tile .lv-stars { font-size:0.7rem; color:#f0c040; }

/* Game Layout */
.game-layout { display:flex; gap:1rem; align-items:flex-start; justify-content:center; flex-wrap:wrap; }

#grid-canvas { background:#1a1a3e; border:2px solid #2a2a5e; border-radius:8px; }

.side-panel { display:flex; flex-direction:column; gap:0.5rem; min-width:220px; max-width:280px; text-align:left; }
.goal-text { font-size:0.85rem; color:#f0c040; font-weight:600; }
.step-counter { font-size:0.8rem; color:#aaa; }
.step-counter strong { color:#4cff72; }
.star-display { font-size:1.1rem; letter-spacing:0.2rem; }

.instruction-queue { background:#1a1a3e; border:2px solid #2a2a5e; border-radius:8px; padding:0.5rem; min-height:60px; max-height:160px; overflow-y:auto; }
.queue-label { font-size:0.7rem; color:#666; margin-bottom:0.3rem; }
#queue-list { display:flex; flex-wrap:wrap; gap:4px; }
.queue-item { background:#2a2a5e; border-radius:6px; padding:0.2rem 0.5rem; font-size:0.8rem; cursor:pointer; transition:background .15s; user-select:none; }
.queue-item:hover { background:#3a3a7e; }
.queue-item.active { background:#f0c040; color:#0f0f23; }

.cmd-buttons { display:flex; flex-wrap:wrap; gap:4px; }
.cmd-btn { background:#1a1a3e; border:2px solid #2a2a5e; border-radius:8px; padding:0.4rem 0.6rem; font-size:0.85rem; color:#fff; cursor:pointer; transition:transform .15s,border-color .15s; user-select:none; }
.cmd-btn:hover { transform:translateY(-1px); border-color:#f0c040; }
.cmd-btn:active { transform:scale(0.95); }

.action-buttons { display:flex; gap:0.4rem; flex-wrap:wrap; }
.action-btn { padding:0.5rem 1rem; font-size:0.9rem; border:none; border-radius:8px; cursor:pointer; font-weight:600; transition:background .2s; }
.run-btn { background:#4cff72; color:#0f0f23; }
.run-btn:hover { background:#6fff92; }
.reset-btn { background:#2a2a5e; color:#fff; }
.reset-btn:hover { background:#3a3a7e; }
.undo-btn { background:#2a2a5e; color:#fff; }
.undo-btn:hover { background:#3a3a7e; }
.back-levels-btn { background:none; border:1px solid #2a2a5e; color:#888; border-radius:6px; padding:0.3rem 0.8rem; font-size:0.8rem; cursor:pointer; margin-top:0.3rem; transition:color .2s; }
.back-levels-btn:hover { color:#f0c040; border-color:#f0c040; }

/* Result overlay */
#result-overlay { position:absolute; inset:0; background:rgba(15,15,35,0.92); border-radius:12px; display:flex; align-items:center; justify-content:center; z-index:20; }
#result-overlay.hidden { display:none; }
.result-card { background:#1a1a3e; border:2px solid #2a2a5e; border-radius:16px; padding:1.5rem; text-align:center; min-width:260px; animation:resultIn .3s ease; }
@keyframes resultIn { from{opacity:0;transform:scale(0.9)} to{opacity:1;transform:scale(1)} }
.result-icon { font-size:3rem; margin-bottom:0.5rem; }
.result-title { font-size:1.3rem; font-weight:700; margin-bottom:0.5rem; }
.result-stars { font-size:1.6rem; letter-spacing:0.3rem; margin-bottom:1rem; }
.result-actions { display:flex; gap:0.6rem; justify-content:center; }
.result-actions .action-btn { min-width:120px; text-align:center; }

/* Report Card (challenge mode) */
.report-card { background:#1a1a3e; border:2px solid #2a2a5e; border-radius:16px; padding:1.5rem; width:90%; max-width:340px; text-align:center; animation:reportSlideIn .4s ease; }
@keyframes reportSlideIn { from{opacity:0;transform:translateY(20px) scale(0.95)} to{opacity:1;transform:translateY(0) scale(1)} }
.report-header { font-size:1.3rem; font-weight:700; margin-bottom:0.5rem; }
.report-stars { font-size:1.8rem; letter-spacing:0.3rem; margin-bottom:0.8rem; }
.report-grid { display:grid; grid-template-columns:1fr 1fr; gap:0.5rem; margin-bottom:0.8rem; }
.report-item { background:#0f0f23; border-radius:10px; padding:0.5rem; display:flex; flex-direction:column; gap:0.15rem; }
.report-label { font-size:0.65rem; color:#888; }
.report-value { font-size:1rem; font-weight:700; color:#f0c040; }
.report-value.surrender { color:#ff4c6a; }
.report-bar-wrap { margin-bottom:0.8rem; }
.report-bar-label { font-size:0.7rem; color:#888; margin-bottom:0.3rem; text-align:left; }
.report-bar { height:8px; background:#0f0f23; border-radius:4px; overflow:hidden; }
.report-bar-fill { height:100%; border-radius:4px; background:linear-gradient(90deg,#ff4c6a,#f0c040,#4cff72); transition:width 1s ease; width:0%; }
.report-best { font-size:0.8rem; color:#f0c040; margin-bottom:0.8rem; }
.report-actions { display:flex; gap:0.6rem; justify-content:center; flex-wrap:wrap; }

@media(max-width:600px){
  .game-layout { flex-direction:column; align-items:center; }
  .side-panel { min-width:unset; max-width:320px; width:100%; }
  #grid-canvas { width:280px; height:280px; }
}


/* Mode Select */
#mode-select { text-align:center; }
.mode-subtitle { color:#888; font-size:0.9rem; margin-bottom:1.5rem; }
.mode-options { display:flex; gap:1rem; justify-content:center; flex-wrap:wrap; }
.mode-btn { background:#1a1a3e; border:2px solid #2a2a5e; border-radius:14px; padding:1.5rem 2rem; cursor:pointer; display:flex; flex-direction:column; align-items:center; gap:0.4rem; transition:transform .2s,border-color .2s,box-shadow .2s; color:#fff; font-family:inherit; min-width:160px; }
.mode-btn:hover { transform:translateY(-3px); border-color:#f0c040; box-shadow:0 0 15px rgba(240,192,64,0.2); }
.mode-icon { font-size:2.2rem; }
.mode-name { font-size:1.1rem; font-weight:700; }
.mode-desc { font-size:0.75rem; color:#888; }

@media (max-width: 599px) { .hamburger-btn { display: none !important; } }