:root{--bg-primary: #ffffff;--bg-secondary: #f4f4f5;--bg-tertiary: #e4e4e7;--text-primary: #09090b;--text-secondary: #52525b;--border-color: #18181b;--accent-black: #000000;--accent-white: #ffffff;--radius: 4px}*{box-sizing:border-box;margin:0;padding:0;touch-action:manipulation;user-select:none;-webkit-user-select:none}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.5;min-height:100vh;display:flex;flex-direction:column}#root{display:flex;flex-direction:column;min-height:100vh}.app-container{max-width:900px;width:100%;margin:0 auto;padding:1rem;display:flex;flex-direction:column;flex:1}header{border-bottom:2px solid var(--border-color);padding-bottom:1rem;margin-bottom:1.5rem}.header-top{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.5rem}.title-section h1{font-size:1.5rem;font-weight:800;letter-spacing:-.025em;color:var(--accent-black)}.title-section p{font-size:.875rem;color:var(--text-secondary)}.controls-group{display:flex;gap:.5rem;align-items:center}button{background-color:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border-color);padding:.5rem 1rem;font-size:.875rem;font-weight:600;cursor:pointer;border-radius:var(--radius);display:inline-flex;align-items:center;gap:.5rem}button:hover,button.active{background-color:var(--accent-black);color:var(--accent-white)}.nav-tabs{display:flex;gap:.5rem;margin-top:1rem;flex-wrap:wrap}.nav-tabs button{flex:1;min-width:100px;justify-content:center;padding:.6rem;font-size:.875rem}.game-card{border:2px solid var(--border-color);border-radius:var(--radius);padding:1.5rem;background-color:var(--bg-primary);flex:1;display:flex;flex-direction:column}.game-title-bar{border-bottom:1px solid var(--border-color);padding-bottom:.75rem;margin-bottom:1rem}.game-title-bar h2{font-size:1.25rem;font-weight:700}.game-title-bar p{font-size:.875rem;color:var(--text-secondary)}.reaction-box{flex:1;min-height:250px;border:2px dashed var(--border-color);display:flex;flex-direction:column;justify-content:center;align-items:center;cursor:pointer;text-align:center;padding:2rem;transition:background-color .1s ease}.reaction-box.waiting{background-color:var(--bg-secondary)}.reaction-box.ready{background-color:var(--accent-black);color:var(--accent-white)}.reaction-box.ready svg{stroke:var(--accent-white)}.reaction-box.too-early{background-color:var(--bg-tertiary)}.memory-stats{display:flex;justify-content:space-between;margin-bottom:1rem;font-weight:600}.memory-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem;margin-bottom:1rem}.memory-card{aspect-ratio:1;border:2px solid var(--border-color);background-color:var(--bg-secondary);display:flex;justify-content:center;align-items:center;cursor:pointer;font-size:1.5rem;border-radius:var(--radius)}.memory-card.flipped,.memory-card.matched{background-color:var(--accent-black);color:var(--accent-white)}.memory-card.matched{opacity:.6;cursor:default}.grid-2048-container{display:flex;justify-content:center;margin-bottom:1rem}.grid-2048{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;background-color:var(--border-color);padding:8px;border-radius:var(--radius);width:280px;height:280px}.tile-2048{background-color:var(--bg-primary);color:var(--accent-black);font-weight:800;font-size:1.25rem;display:flex;justify-content:center;align-items:center;border-radius:2px}.tile-val-2{background-color:#f4f4f5}.tile-val-4{background-color:#e4e4e7}.tile-val-8{background-color:#d4d4d8}.tile-val-16{background-color:#a1a1aa;color:#fff}.tile-val-32{background-color:#71717a;color:#fff}.tile-val-64{background-color:#52525b;color:#fff}.tile-val-128{background-color:#3f3f46;color:#fff}.tile-val-256{background-color:#27272a;color:#fff}.tile-val-512{background-color:#18181b;color:#fff}.tile-val-1024{background-color:#09090b;color:#fff}.tile-val-2048{background-color:#000;color:#fff}.tetris-board{display:grid;grid-template-columns:repeat(10,20px);grid-template-rows:repeat(20,20px);gap:1px;background-color:var(--border-color);border:2px solid var(--border-color)}.tetris-cell{background-color:var(--bg-primary)}.tetris-cell.filled{background-color:var(--accent-black)}.tetris-cell.falling{background-color:#52525b}.touch-controls{display:flex;flex-direction:column;align-items:center;gap:.5rem;margin-top:.5rem}.touch-row{display:flex;gap:.5rem}.touch-row button{min-width:60px;justify-content:center}.admin-panel{margin-top:1.5rem;border:2px solid var(--border-color);background-color:var(--bg-secondary);padding:1rem;border-radius:var(--radius)}.admin-header{font-weight:700;border-bottom:1px solid var(--border-color);padding-bottom:.5rem;margin-bottom:.75rem;font-size:.875rem;text-transform:uppercase}.admin-controls{display:flex;gap:.5rem;margin-bottom:.75rem}.admin-log{background-color:var(--accent-black);color:var(--accent-white);padding:.75rem;font-family:monospace;font-size:.75rem;max-height:120px;overflow-y:auto;border-radius:var(--radius)}svg{width:1.25rem;height:1.25rem}