:root{--primary-color: #2ea44f;--primary-hover: #2c974b;--secondary-color: #6e40c9;--secondary-hover: #5a32a3;--bg-dark: #0d1117;--bg-card: #161b22;--bg-hover: #1f2937;--text-primary: #c9d1d9;--text-secondary: #8b949e;--border-color: #30363d;--error-color: #f85149;--success-color: #3fb950;--snake-color: #58a6ff;--food-glow: #f78166;--accent-orange: #ff9980;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;background:linear-gradient(135deg,var(--bg-dark) 0%,#0a0e1a 100%);color:var(--text-primary);line-height:1.6;overflow-x:hidden;touch-action:manipulation;-webkit-tap-highlight-color:transparent}#app{display:flex;flex-direction:column;min-height:100vh}.header{padding:2rem 2rem 1.5rem;background:linear-gradient(180deg,rgba(46,164,79,.1) 0%,transparent 100%);border-bottom:1px solid var(--border-color)}.header-content{max-width:1980px;margin:0 auto;padding:0 1rem;display:flex;justify-content:space-between;align-items:center;gap:2rem;flex-wrap:wrap}.header-title{flex:1}.header-logo{text-decoration:none;color:inherit;cursor:pointer;transition:opacity .2s ease}.header-logo:hover{opacity:.85}.github-link{color:var(--text-secondary);transition:color .2s ease,transform .2s ease;display:flex;align-items:center}.github-link:hover{color:var(--text-primary);transform:scale(1.1)}.header h1{font-size:2.5rem;font-weight:700;margin-bottom:.5rem;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{color:var(--text-secondary);font-size:1rem}.container{flex:1;max-width:1980px;width:100%;margin:0 auto;padding:3rem 1rem}.screen{display:none;opacity:0}.screen.active{display:block;animation:screenFadeIn .4s ease-out forwards}@keyframes screenFadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:2rem;box-shadow:0 8px 24px #0006}.card h2{margin-bottom:1.5rem;font-size:1.5rem;text-align:center}.input-group{display:flex;gap:.75rem;margin-bottom:1rem}input[type=text]{flex:1;padding:.75rem 1rem;background:var(--bg-dark);border:1px solid var(--border-color);border-radius:8px;color:var(--text-primary);font-size:1rem;transition:all .2s ease}input[type=text]:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #2ea44f1a}input[type=text]::placeholder{color:var(--text-secondary)}.btn{padding:.875rem 2rem;border:none;border-radius:10px;font-size:1.0625rem;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap}.btn-large{padding:1.125rem 2.5rem;font-size:1.125rem}.btn-primary{background:var(--primary-color);color:#fff}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 4px 12px #2ea44f4d}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--secondary-color);color:#fff}.btn-secondary:hover{background:var(--secondary-hover);transform:translateY(-2px);box-shadow:0 4px 12px #6e40c94d}.btn-secondary:active{transform:translateY(0)}.btn-tertiary{background:#4a5568;color:#fff;border:2px solid #718096}.btn-tertiary:hover{background:#5a6c7d;border-color:#8b949e;transform:translateY(-2px);box-shadow:0 4px 12px #4a556866}.btn-tertiary:active{transform:translateY(0)}.btn-small{padding:.5rem 1rem;font-size:.9rem;background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border-color)}.btn-small:hover{background:var(--bg-hover);border-color:var(--primary-color)}.btn-link{background:none;border:none;color:var(--primary-color);cursor:pointer;font-size:.9rem;padding:.5rem;transition:color .2s ease}.btn-link:hover{color:var(--primary-hover);text-decoration:underline}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn-focused{outline:3px solid #ffffff;outline-offset:2px;transform:translateY(-2px);box-shadow:0 6px 20px #ffffff4d}.divider{text-align:center;color:var(--text-secondary);margin:1.5rem 0;position:relative}.divider:before,.divider:after{content:"";position:absolute;top:50%;width:40%;height:1px;background:var(--border-color)}.divider:before{left:0}.divider:after{right:0}.error-message{margin-top:1rem;padding:1rem;background:#f851491a;border:1px solid var(--error-color);border-radius:8px;color:var(--error-color);text-align:center}.error-message.hidden{display:none}.game-info{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding:1rem;background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px}.score-display,.high-score-display{display:flex;align-items:center;gap:.5rem}.score-display .label,.high-score-display .label{color:var(--text-secondary);font-size:.9rem}.score-display .value,.high-score-display .value{font-size:1.5rem;font-weight:700;color:var(--primary-color)}.canvas-container{position:relative;background:var(--bg-card);border:3px solid var(--border-color);border-radius:16px;overflow:hidden;box-shadow:0 12px 32px #00000080,0 0 0 1px #ffffff0d;width:100%;max-width:100%}#gameCanvas{display:block;width:100%;height:auto;image-rendering:pixelated;image-rendering:crisp-edges;touch-action:none}.modal{position:fixed;inset:0;z-index:2000;display:flex;align-items:center;justify-content:center;padding:1rem}.modal.hidden{display:none}.modal-backdrop{position:absolute;inset:0;background:#0d1117eb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);animation:modalFadeIn .25s ease-out}.modal-container{position:relative;z-index:1;width:100%;max-width:480px;max-height:calc(100vh - 2rem);overflow-y:auto;animation:modalSlideIn .3s ease-out}.modal-content{background:var(--bg-card);border:2px solid var(--border-color);border-radius:20px;padding:2rem;text-align:center;position:relative;overflow:hidden;box-shadow:0 25px 80px #00000080,0 0 0 1px #ffffff14}.modal-content:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary-color) 0%,var(--secondary-color) 50%,var(--accent-orange) 100%);border-radius:20px 20px 0 0}@keyframes modalFadeIn{0%{opacity:0}to{opacity:1}}@keyframes modalSlideIn{0%{opacity:0;transform:translateY(-20px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}.modal-icon{font-size:4rem;margin-bottom:1rem;display:block;animation:modalIconPulse 2s ease-in-out infinite}@keyframes modalIconPulse{0%,to{transform:scale(1)}50%{transform:scale(1.08)}}.modal-title{font-size:2rem;font-weight:800;margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.03em}.modal-title--error{color:var(--error-color)}.modal-title--success{color:var(--primary-color)}.modal-title--info{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.modal-message{font-size:1rem;color:var(--text-secondary);margin-bottom:1.5rem;line-height:1.5}.modal-score{font-size:4rem;font-weight:800;color:var(--primary-color);margin:1rem 0 1.5rem;text-shadow:0 0 30px rgba(46,164,79,.4);animation:scoreGlow 2s ease-in-out infinite}@keyframes scoreGlow{0%,to{text-shadow:0 0 20px rgba(46,164,79,.4)}50%{text-shadow:0 0 40px rgba(46,164,79,.7)}}.modal-body{flex:1}.modal-actions{display:flex;flex-direction:column;gap:.75rem;margin-top:1.5rem}.modal-actions .btn{width:100%;justify-content:center}@media(min-width:480px){.modal-container{max-width:420px}.modal-content{padding:2.5rem}.modal-title{font-size:2.25rem}.modal-actions{flex-direction:row;flex-wrap:wrap}.modal-actions .btn{flex:1;min-width:120px}}.hidden{display:none!important}.game-selection{max-width:1200px;margin:0 auto}.selection-title{text-align:center;font-size:2.5rem;margin-bottom:3rem;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.game-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;padding:1rem}.game-card{background:var(--bg-card);border:2px solid var(--border-color);border-radius:16px;padding:2.5rem 2rem;text-align:center;transition:all .3s ease;cursor:pointer}.game-card:hover{transform:translateY(-8px);border-color:var(--primary-color);box-shadow:0 12px 32px #2ea44f4d}.game-card[data-game=snake]:hover{border-color:#2ea44f;box-shadow:0 12px 32px #2ea44f4d}.game-card[data-game=tanks]:hover{border-color:#ff6b6b;box-shadow:0 12px 32px #ff6b6b4d}.game-card[data-game=breakout]:hover{border-color:#4ecdc4;box-shadow:0 12px 32px #4ecdc44d}.menu-hint{display:flex;align-items:center;justify-content:center;gap:.5rem;margin-top:2rem;font-size:.9rem;color:var(--text-secondary)}.game-card-focused{transform:translateY(-8px)}.game-card-focused[data-game=snake]{border-color:#2ea44f;box-shadow:0 12px 32px #2ea44f66,0 0 0 3px #2ea44f4d}.game-card-focused[data-game=tanks]{border-color:#ff6b6b;box-shadow:0 12px 32px #ff6b6b66,0 0 0 3px #ff6b6b4d}.game-card-focused[data-game=breakout]{border-color:#4ecdc4;box-shadow:0 12px 32px #4ecdc466,0 0 0 3px #4ecdc44d}.game-icon{font-size:5rem;margin-bottom:1rem;filter:drop-shadow(0 4px 8px rgba(0,0,0,.3))}.game-card h3{font-size:1.75rem;margin-bottom:.75rem;color:var(--text-primary)}.game-card p{color:var(--text-secondary);margin-bottom:1.5rem;font-size:1.0625rem}.btn-play{width:100%;padding:1rem 2rem;font-size:1.125rem;font-weight:600;border-radius:10px;cursor:pointer;transition:all .2s ease;border:none;color:#fff}.btn-snake{background:#2ea44f}.btn-snake:hover{background:#2c974b;transform:translateY(-2px);box-shadow:0 6px 16px #2ea44f66}.btn-tanks{background:#ff6b6b}.btn-tanks:hover{background:#ff5252;transform:translateY(-2px);box-shadow:0 6px 16px #ff6b6b66}.btn-breakout{background:#4ecdc4}.btn-breakout:hover{background:#3dbdb3;transform:translateY(-2px);box-shadow:0 6px 16px #4ecdc466}.game-container{max-width:100%;margin:0 auto;display:flex;flex-direction:column;align-items:center}.score-panel{display:flex;align-items:center;justify-content:center;gap:3rem;background:var(--bg-card);border:3px solid var(--border-color);border-radius:16px;padding:1.5rem 2.5rem;margin-bottom:2.5rem;box-shadow:0 12px 32px #00000080,0 0 0 1px #ffffff0d;width:100%;max-width:100%}.score-display,.high-score-display,.speed-display{display:flex;flex-direction:column;gap:.5rem}.score-display .label,.high-score-display .label,.speed-display .label{color:var(--text-secondary);font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.score-display .value,.high-score-display .value{font-size:2.5rem;font-weight:700;color:var(--primary-color);line-height:1;font-variant-numeric:tabular-nums}.speed-display .value{font-size:2.5rem;font-weight:700;color:var(--accent-orange);line-height:1;font-variant-numeric:tabular-nums}.score-divider{width:2px;height:50px;background:var(--border-color)}.game-footer{margin-top:4rem;margin-bottom:2rem;text-align:center}.controls-hint{display:inline-flex;align-items:center;gap:.875rem;background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:1.25rem 2.5rem;font-size:1rem;color:var(--text-secondary);flex-wrap:wrap;justify-content:center}.key-icon{background:var(--bg-dark);color:var(--text-primary);padding:.375rem .75rem;border-radius:6px;border:1px solid var(--border-color);font-family:monospace;font-weight:600;font-size:.9375rem;box-shadow:0 2px 4px #0003}.separator{color:var(--border-color)}.overlay-actions{display:flex;flex-direction:row;gap:1.25rem;width:100%;max-width:100%;margin:0 auto;justify-content:center;flex-wrap:wrap;padding-bottom:1rem}.overlay-actions .btn{flex:1;min-width:180px;max-width:240px;padding:1.25rem 2rem}#gameCanvas{touch-action:none;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}.canvas-container{touch-action:none}@media(max-width:768px){.game-card{padding:2rem 1.5rem;min-height:200px}.game-card .btn-play{padding:1rem 2rem;font-size:1.125rem;min-height:48px}.game-icon{font-size:4rem}.menu-hint{display:none}.canvas-container{max-width:100vw;overflow-x:auto}#gameCanvas{max-width:100%;height:auto}.controls-hint{display:none}.game-footer:after{content:"Swipe to move • Tap to pause";display:block;text-align:center;font-size:.9rem;color:var(--text-secondary);padding:.75rem}}@media(max-width:768px){.header h1{font-size:2rem}.header-content{flex-direction:column;align-items:stretch;gap:1rem}.header-title{text-align:center}.input-group{flex-direction:column}.score-panel{flex-direction:column;gap:1.5rem;padding:1.5rem}.score-divider{width:80%;height:1px}.modal-content{padding:1.5rem}.modal-title{font-size:1.75rem}.modal-score{font-size:3rem}.modal-actions{flex-direction:column}.modal-actions .btn{width:100%}.controls-hint{font-size:.9rem;padding:.75rem 1rem}}@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.portrait-overlay{display:none;position:fixed;inset:0;z-index:9999;background:linear-gradient(135deg,var(--bg-dark) 0%,#0a0e1a 100%);align-items:center;justify-content:center;text-align:center;padding:2rem}.portrait-content{max-width:300px}.portrait-content .rotate-icon{font-size:4rem;margin-bottom:1.5rem;display:block}.portrait-content h2{font-size:1.5rem;margin-bottom:1rem;color:var(--text-primary)}.portrait-content p{color:var(--text-secondary);font-size:1rem;line-height:1.5}.rotate-animation{margin-top:2rem;display:flex;align-items:center;justify-content:center;gap:1rem}.rotate-animation .device-icon{font-size:3rem;animation:rotateDevice 2s ease-in-out infinite;display:inline-block}.rotate-animation .arrow-icon{font-size:2rem;color:var(--primary-color);animation:pulseArrow 1s ease-in-out infinite}@keyframes rotateDevice{0%,to{transform:rotate(0)}50%{transform:rotate(90deg)}}@keyframes pulseArrow{0%,to{opacity:.5;transform:scale(1)}50%{opacity:1;transform:scale(1.2)}}.touch-controls{position:fixed;bottom:0;left:0;right:0;display:none;justify-content:space-between;align-items:flex-end;padding:1rem;pointer-events:none;z-index:100}.touch-controls.active{display:flex}.touch-dpad{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:.25rem;width:140px;height:140px;pointer-events:auto}.dpad-btn{background:#2ea44f4d;border:2px solid rgba(46,164,79,.5);border-radius:8px;color:#fff;font-size:1.25rem;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .1s ease;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.dpad-btn:active{background:#2ea44f99;transform:scale(.95)}.dpad-center{background:#1e1e1e80;border-color:#3c3c3c80;pointer-events:none}.dpad-up{grid-column:2;grid-row:1}.dpad-left{grid-column:1;grid-row:2}.dpad-center{grid-column:2;grid-row:2}.dpad-right{grid-column:3;grid-row:2}.dpad-down{grid-column:2;grid-row:3}.touch-actions{display:flex;flex-direction:column;gap:.75rem;pointer-events:auto}.action-btn{width:64px;height:64px;border-radius:50%;border:2px solid rgba(255,255,255,.3);background:#1e1e1e99;color:#fff;font-size:1.5rem;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .1s ease;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.action-btn:active{transform:scale(.9)}.action-pause{background:#6e40c966;border-color:#6e40c999}.action-fire{background:#ff6b6b66;border-color:#ff6b6b99}.action-fire:active{background:#ff6b6bb3}@media(max-width:932px)and (orientation:landscape){.portrait-overlay{display:none!important}html,body{overflow:hidden;width:100%;height:100%}#app{height:100%;width:100%;overflow:hidden;padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}.header{display:none}.container{padding:0;margin:0;height:100%;width:100%;max-width:100%;display:block;overflow:hidden}.screen{display:none;opacity:1}.screen.active{display:flex!important;animation:none}#menuScreen.active{height:100%;width:100%;display:flex!important;align-items:center;justify-content:center}#menuScreen .game-selection{padding:1rem;width:100%;display:flex;flex-direction:column;justify-content:center;align-items:center}#menuScreen .selection-title{font-size:1.5rem;margin-bottom:1.5rem}#menuScreen .game-grid{display:flex;flex-direction:row;gap:1rem;padding:0;justify-content:center;align-items:stretch;width:100%;max-width:600px}#menuScreen .game-card{flex:1;max-width:180px;padding:1.25rem 1rem;min-height:auto;display:flex;flex-direction:column;justify-content:center;align-items:center}#menuScreen .game-icon{font-size:3rem;margin-bottom:.5rem}#menuScreen .game-card h3{font-size:1.125rem;margin-bottom:0}#menuScreen .game-card p,#menuScreen .btn-play,#menuScreen .menu-hint{display:none}#gameScreen.active{height:100%;width:100%;display:flex!important;flex-direction:column;position:relative}#gameScreen .game-container{flex:1;display:flex;flex-direction:row;align-items:center;justify-content:center;gap:0;padding:0;height:100%;width:100%}#gameScreen .score-panel{position:fixed;top:.5rem;left:50%;transform:translate(-50%);flex-direction:row;gap:1.5rem;padding:.5rem 1rem;margin:0;width:auto;min-width:auto;background:#161b22e6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:12px;border:1px solid var(--border-color);z-index:10}#gameScreen .score-display,#gameScreen .high-score-display,#gameScreen .speed-display{flex-direction:row;align-items:center;gap:.5rem}#gameScreen .score-display .value,#gameScreen .high-score-display .value,#gameScreen .speed-display .value{font-size:1.25rem}#gameScreen .score-display .label,#gameScreen .high-score-display .label,#gameScreen .speed-display .label{font-size:.625rem}#gameScreen .score-divider{width:1px;height:30px}#gameScreen .canvas-container{height:100%;width:100%;max-height:100%;max-width:100%;border:none;border-radius:0;box-shadow:none;display:flex;align-items:center;justify-content:center;background:var(--bg-dark)}#gameScreen #gameCanvas{max-height:100%;max-width:100%;width:auto;height:auto;object-fit:contain}#gameScreen .game-footer{display:none}.touch-controls.active{display:flex;padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right);padding-bottom:env(safe-area-inset-bottom)}.touch-dpad{width:110px;height:110px}.dpad-btn{font-size:1rem}.action-btn{width:52px;height:52px;font-size:1.125rem}.modal{padding:.5rem;padding-left:calc(.5rem + env(safe-area-inset-left));padding-right:calc(.5rem + env(safe-area-inset-right))}.modal-container{max-width:90vw;max-height:90vh}.modal-content{padding:1rem 1.5rem;border-radius:16px;display:flex;flex-direction:row;align-items:center;gap:1.5rem;text-align:left}.modal-content:before{display:none}.modal-icon{font-size:3rem;margin:0;flex-shrink:0}.modal-title{font-size:1.25rem;margin-bottom:.25rem}.modal-message{font-size:.875rem;margin-bottom:.5rem}.modal-score{font-size:2.5rem;margin:.5rem 0}.modal-actions{flex-direction:row;gap:.5rem;margin-top:.75rem}.modal-actions .btn{padding:.75rem 1rem;font-size:.875rem;min-width:auto;flex:1}}@media(max-width:932px)and (orientation:portrait){.portrait-overlay{display:flex}#app>*:not(.portrait-overlay):not(script){display:none!important}}@media(min-width:768px)and (max-width:1024px)and (orientation:landscape){.header{display:none}.container{padding:0;margin:0;height:100vh;max-width:100%}#gameScreen .score-panel{gap:2rem;padding:.75rem 1.5rem}#gameScreen .score-display .value,#gameScreen .high-score-display .value,#gameScreen .speed-display .value{font-size:1.5rem}.touch-dpad{width:140px;height:140px}.dpad-btn{font-size:1.25rem}.action-btn{width:64px;height:64px;font-size:1.5rem}.modal-content{gap:2rem;padding:1.5rem 2rem}.modal-icon{font-size:3.5rem}.modal-title{font-size:1.5rem}.modal-score{font-size:3rem}.modal-actions .btn{padding:.875rem 1.25rem;font-size:1rem}}@media(min-width:933px){.portrait-overlay,.touch-controls{display:none!important}}