.language-switcher{position:relative;display:inline-block}.language-button{display:flex;align-items:center;gap:6px;padding:8px 12px;background:#fff;border:1px solid #e0e0e0;border-radius:8px;cursor:pointer;font-size:14px;transition:all .2s ease;box-shadow:0 2px 4px #0000000d}.language-button:hover{border-color:#667eea;box-shadow:0 4px 8px #667eea26}.language-button:focus{outline:2px solid #667eea;outline-offset:2px}.language-icon{font-size:16px}.language-current{font-weight:500;color:#333}.arrow{font-size:10px;color:#888;transition:transform .2s ease}.arrow.open{transform:rotate(180deg)}.language-dropdown{position:absolute;top:calc(100% + 8px);right:0;min-width:180px;max-height:400px;overflow-y:auto;background:#fff;border:1px solid #e0e0e0;border-radius:8px;box-shadow:0 4px 12px #00000026;z-index:1000;padding:4px}.language-option{display:flex;align-items:center;justify-content:space-between;width:100%;padding:10px 12px;text-align:left;background:transparent;border:none;border-radius:6px;cursor:pointer;font-size:14px;color:#333;transition:background .15s ease}.language-option:hover{background:#f5f5f5}.language-option.active{background:#667eea1a;color:#667eea;font-weight:500}.check{font-size:12px}.backdrop{position:fixed;top:0;left:0;right:0;bottom:0;z-index:999}.language-dropdown::-webkit-scrollbar{width:8px}.language-dropdown::-webkit-scrollbar-track{background:#f5f5f5;border-radius:4px}.language-dropdown::-webkit-scrollbar-thumb{background:#ccc;border-radius:4px}.language-dropdown::-webkit-scrollbar-thumb:hover{background:#aaa}@media (max-width: 640px){.language-dropdown{left:0;right:auto;min-width:160px}.language-current{display:none}.language-button{padding:8px}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;color:#333;margin:0;padding:0}.fullscreen-test-active{overflow:hidden!important}.fullscreen-test-active body{margin:0!important;padding:0!important;overflow:hidden!important}#root{min-height:100vh}.app-container{min-height:100vh;display:flex;flex-direction:column}header{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:1rem 2rem;box-shadow:0 2px 20px #0000001a;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem}header>div:first-child{display:flex;flex-direction:column;gap:.25rem}h1{font-size:2rem;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.app-description{color:#666;font-size:.95rem}main{flex:1;padding:2rem;max-width:1600px;margin:0 auto;width:100%}.test-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-top:2rem}.test-card{background:#fff;border-radius:16px;padding:2rem;box-shadow:0 8px 32px #0000001a;transition:transform .3s ease,box-shadow .3s ease;cursor:pointer}.test-card:hover{transform:translateY(-5px);box-shadow:0 12px 40px #00000026}test-card h2{font-size:1.5rem;margin-bottom:1rem;color:#667eea}.test-card p{color:#666;line-height:1.6}.test-container{background:#fff;border-radius:16px;padding:2rem;box-shadow:0 8px 32px #0000001a}.test-header{margin-bottom:2rem}.test-header h2{font-size:2rem;color:#667eea;margin-bottom:.5rem}.test-header p{color:#666}.test-content{margin-top:2rem}.fullscreen-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:1rem 2rem;border-radius:8px;font-size:1rem;cursor:pointer;transition:all .3s ease;margin:1rem 0}.fullscreen-btn:hover{transform:translateY(-2px);box-shadow:0 4px 15px #667eea66}.color-test{width:100%;height:200px;border-radius:8px;margin:1rem 0;transition:background-color .5s ease}.resolution-info{background:#f8f9fa;padding:1.5rem;border-radius:8px;margin:1rem 0}.resolution-info h3{margin-bottom:.5rem;color:#667eea}.resolution-info p{color:#666;margin:.25rem 0}.back-btn{background:#6c757d;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:8px;font-size:1rem;cursor:pointer;transition:all .3s ease;margin-bottom:2rem}.back-btn:hover{background:#5a6268}@media (max-width: 768px){header{padding:1rem}h1{font-size:1.5rem}main{padding:1rem}.test-grid{grid-template-columns:1fr}.test-container{padding:1rem}}