.landing-page{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;width:100%;height:100%;text-align:center;background-color:#e0f7fa}.landing-title{font-size:clamp(2rem,8vmin,4rem);color:#00796b;margin-bottom:4vmin}.app-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(clamp(150px,30vmin,250px),1fr));gap:clamp(15px,3vmin,30px);width:100%;max-width:1200px;padding:10px}.app-button{display:flex;flex-direction:column;justify-content:center;align-items:center;padding:clamp(15px,4vmin,30px);border-radius:15px;text-decoration:none;transition:transform .2s ease-out,box-shadow .2s ease-out;min-height:clamp(100px,20vmin,180px);box-shadow:0 4px 8px #0000001a;cursor:pointer;color:#fff}.app-button-active{background:linear-gradient(135deg,#4db6ac,#00897b)}.app-button-active:hover{transform:scale(1.03);box-shadow:0 6px 12px #00000026}.app-button-disabled{background-color:#bdbdbd;color:#757575;cursor:not-allowed;box-shadow:0 2px 4px #0000000d}.app-button-title{font-size:clamp(1rem,3vmin,1.5rem);font-weight:700;margin-bottom:5px}.app-button-status{font-size:clamp(.75rem,2vmin,.9rem);font-style:italic}.language-switcher{position:absolute;top:15px;right:15px;z-index:20}.language-switcher button{padding:5px 10px;margin-left:5px;cursor:pointer;border:1px solid #ccc;border-radius:4px}.language-switcher button:disabled{cursor:default;opacity:.6}.container{display:flex;flex-direction:column;justify-content:space-between;align-items:center;width:100%;height:100%;padding:1vmin 2vmin}.letter-display{font-size:60vmin;font-weight:700;color:#333;flex-grow:1;flex-shrink:1;display:flex;justify-content:center;align-items:center;line-height:.9;text-shadow:3px 3px 6px rgba(0,0,0,.15);width:100%;min-height:0}.feedback-buttons{display:flex;justify-content:center;align-items:center;gap:2vmin;width:100%;flex-shrink:0;flex-wrap:wrap;padding:2vmin 0}.btn{padding:2vmin 4vmin;font-size:max(2.5vmin,16px);border:none;border-radius:10px;cursor:pointer;transition:transform .1s ease,background-color .2s ease;color:#fff;min-width:max(20vmin,100px);text-align:center;box-shadow:2px 2px 5px #0003}.btn:active{transform:scale(.95)}.easy{background-color:#4caf50}.hard{background-color:#ff9800}.unknown{background-color:#f44336}.easy:hover{background-color:#45a049}.hard:hover{background-color:#fb8c00}.unknown:hover{background-color:#e53935}.stats{position:absolute;top:1vmin;left:1vmin;font-size:max(1.8vmin,12px);color:#555;background-color:#fffc;padding:.5vmin 1vmin;border-radius:5px;z-index:10}.progress-bar{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:1vmin;width:100%;max-width:95%;padding:1.5vmin 0;flex-shrink:0;margin-bottom:1vh}.progress-letter{display:inline-flex;justify-content:center;align-items:center;padding:.5vmin;min-width:max(5vmin,25px);height:max(5vmin,25px);font-size:max(2.5vmin,14px);font-weight:700;color:#fff;text-shadow:1px 1px 2px rgba(0,0,0,.4);border-radius:5px;text-align:center;background-color:#ccc;transition:background-color .4s ease}.shape-display-area{flex-grow:1;display:flex;justify-content:center;align-items:center;width:100%;padding:3vmin;min-height:50vmin}.shape-display-area.placeholder{color:#aaa;font-style:italic}.shape-svg{width:60vmin;height:60vmin;max-width:400px;max-height:400px;filter:drop-shadow(5px 5px 5px rgba(0,0,0,.2))}.shape-svg path{transition:fill .3s ease}.shape-controls{display:flex;justify-content:center;gap:3vmin;padding:2vmin 0;width:100%;flex-wrap:wrap;flex-shrink:0}.shape-control-button{padding:2vmin 4vmin;font-size:max(2.5vmin,16px);border-radius:10px;border:none;cursor:pointer;background-color:#4db6ac;color:#fff;font-weight:700;transition:background-color .2s ease,transform .1s ease;box-shadow:0 3px 6px #00000026}.shape-control-button:hover:not(:disabled){background-color:#26a69a}.shape-control-button:active:not(:disabled){transform:scale(.96)}.shape-control-button:disabled{background-color:#ccc;cursor:not-allowed;box-shadow:none}.next-shape{background-color:#81c784}.next-shape:hover:not(:disabled){background-color:#66bb6a}.shape-explorer-container{display:flex;flex-direction:column;align-items:center;justify-content:space-between;height:100%;width:100%;padding:1vmin 2vmin;background-color:#fff9c4;position:relative}.page-title{font-size:clamp(1.8rem,6vmin,3rem);color:#f57f17;margin-top:6vmin;margin-bottom:1vmin;flex-shrink:0}.current-shape-name{font-size:clamp(1.5rem,4vmin,2.5rem);color:#555;font-weight:700;margin-top:1vmin;margin-bottom:1vmin;flex-shrink:0;text-align:center;min-height:3rem}.shape-explorer-container .back-button{top:15px;left:15px;color:#f57f17}.shape-explorer-container .back-button:hover{color:#e65100}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;overflow:hidden}body{display:flex;justify-content:center;align-items:center;background-color:#f0f0f0;font-family:Arial Rounded MT Bold,Helvetica Rounded,Arial,sans-serif;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.back-button{position:absolute;top:15px;left:15px;font-size:max(1.8vmin,14px);color:#00796b;text-decoration:none;background-color:#fffc;padding:5px 10px;border-radius:5px;z-index:20;transition:background-color .2s ease}.back-button:hover{background-color:#fff;color:#004d40}.alphabet-app-container{background-color:#f0f0f0}@media (max-height: 450px){.letter-display{font-size:45vmin;margin-top:1vh;margin-bottom:.5vh}.btn{padding:1.5vmin 3vmin;font-size:max(2.2vmin,14px);min-width:max(18vmin,90px)}.progress-bar{padding:1vmin 0}.progress-letter{min-width:max(4.5vmin,22px);height:max(4.5vmin,22px);font-size:max(2.2vmin,12px)}}@media (max-width: 480px){.feedback-buttons{gap:1.5vmin}}.color-display-area{flex-grow:1;width:100%;margin:0;padding:0;background-color:transparent;border-radius:0;box-shadow:none;border:none;display:flex;justify-content:center;align-items:center;min-height:50vmin;overflow:hidden}.placeholder-text{color:#999;font-size:1.2rem;font-style:italic}.color-display-area svg{display:block;width:100%;height:100%}.color-controls{display:flex;justify-content:center;gap:3vmin;padding:2vmin 0;width:100%;flex-wrap:wrap;flex-shrink:0}.color-control-button{padding:2vmin 4vmin;font-size:max(2.5vmin,16px);border-radius:10px;border:none;cursor:pointer;background-color:#1e88e5;color:#fff;font-weight:700;transition:background-color .2s ease,transform .1s ease;box-shadow:0 3px 6px #00000026}.color-control-button:hover:not(:disabled){background-color:#1565c0}.color-control-button:active:not(:disabled){transform:scale(.96)}.color-control-button:disabled{background-color:#ccc;cursor:not-allowed;box-shadow:none}.next-color{background-color:#fb8c00}.next-color:hover:not(:disabled){background-color:#ef6c00}.color-splash-container{display:flex;flex-direction:column;align-items:center;justify-content:space-between;height:100%;width:100%;padding:1vmin 2vmin;background-color:#eceff1;position:relative}.page-title{margin-top:6vmin;margin-bottom:.5vmin;flex-shrink:0;font-size:clamp(1.8rem,6vmin,3rem);color:#546e7a;text-align:center}.current-color-name{margin-top:.5vmin;margin-bottom:.5vmin;flex-shrink:0;font-size:clamp(1.8rem,5vmin,3rem);color:#37474f;font-weight:700;text-align:center;min-height:3.5rem}.color-splash-container .back-button{top:15px;left:15px;color:#546e7a}.color-splash-container .back-button:hover{color:#263238}