body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}*{margin:0;padding:0;box-sizing:border-box;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.answer-textarea:not(.locked){-webkit-user-select:text;-moz-user-select:text;-ms-user-select:text;user-select:text}body,html{height:100%;overflow:hidden}#root{height:100%}.app-container{height:100vh;width:100vw;display:flex;flex-direction:column;background:linear-gradient(135deg,#667eea,#764ba2);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;overflow:hidden}.start-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:40px}.start-content{background:#fff;border-radius:30px;padding:60px;max-width:700px;text-align:center;box-shadow:0 30px 80px #0000004d;animation:fadeInScale .6s ease}@keyframes fadeInScale{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.start-icon{font-size:5rem;margin-bottom:20px;animation:bounce 2s infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-20px)}}.start-title{font-size:3rem;color:#333;margin-bottom:20px;font-weight:700;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.start-description{font-size:1.2rem;color:#666;margin-bottom:30px;line-height:1.8}.test-instructions{background:#f8f9fa;border-radius:15px;padding:25px;margin:30px 0;text-align:left;border-left:4px solid #667eea}.test-instructions h3{color:#333;margin-bottom:15px;font-size:1.3rem}.test-instructions ul{list-style:none;padding:0}.test-instructions li{color:#555;padding:10px 0 10px 30px;position:relative;line-height:1.6}.test-instructions li:before{content:"✓";position:absolute;left:0;color:#38ef7d;font-weight:700;font-size:1.2rem}.start-button{display:inline-flex;align-items:center;gap:10px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:18px 50px;border:none;border-radius:50px;font-size:1.3rem;font-weight:700;cursor:pointer;box-shadow:0 10px 30px #667eea66;transition:all .3s ease;margin-top:20px}.start-button:hover{transform:translateY(-3px);box-shadow:0 15px 40px #667eea99}.start-btn-icon{font-size:1.5rem}.header{background:#fffffffa;padding:25px 40px;box-shadow:0 4px 20px #0000001a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.header-content{max-width:100%;margin:0 auto}.header h1{color:#333;font-size:2.5rem;margin-bottom:15px;font-weight:700;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.progress-bar{width:100%;height:8px;background:#e0e0e0;border-radius:10px;overflow:hidden;margin:15px 0}.progress-fill{height:100%;background:linear-gradient(90deg,#667eea,#764ba2);transition:width .4s ease;border-radius:10px}.slide-counter{color:#666;font-size:1rem;margin-top:10px;font-weight:500}.main-content{flex:1;padding:20px;max-width:100%;width:100%;margin:0 auto;overflow-y:auto}.slide{background:#fff;border-radius:20px;padding:30px;box-shadow:0 20px 60px #0003;animation:slideIn .5s ease;height:100%;display:flex;flex-direction:column}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.slide-title{color:#333;font-size:2rem;margin-bottom:30px;text-align:center;font-weight:600}.content-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px;margin-top:20px;flex:1;overflow:hidden}.left-panel{display:flex;flex-direction:column;gap:20px;overflow-y:auto}.code-section,.answer-section,.image-section,.target-section{background:#f8f9fa;border-radius:15px;padding:20px;border:2px solid #e9ecef}.section-header{display:flex;align-items:center;gap:10px;margin-bottom:15px;justify-content:space-between}.section-header .icon{font-size:1.5rem}.section-header h3{color:#495057;font-size:1.2rem;font-weight:600;flex:1}.accuracy-indicator{display:flex;align-items:center;margin-left:auto}.circular-progress{width:50px;height:50px;transform:rotate(-90deg)}.circle-bg{fill:none;stroke:#e9ecef;stroke-width:3}.circle-progress{fill:none;stroke-width:3;stroke-linecap:round;transition:stroke-dasharray .3s ease,stroke .3s ease;stroke:#dc3545}.circle-progress[stroke-dasharray^="0,"],.circle-progress[stroke-dasharray^="1,"],.circle-progress[stroke-dasharray^="2,"],.circle-progress[stroke-dasharray^="3,"],.circle-progress[stroke-dasharray^="4,"]{stroke:#dc3545}.circle-progress[stroke-dasharray^="5,"],.circle-progress[stroke-dasharray^="6,"],.circle-progress[stroke-dasharray^="7,"]{stroke:#fd7e14}.circle-progress[stroke-dasharray^="8,"],.circle-progress[stroke-dasharray^="9,"]{stroke:#ffc107}.circle-progress[stroke-dasharray^="10,"]{stroke:#28a745}.percentage-text{fill:#495057;font-size:.5rem;font-weight:700;text-anchor:middle;transform:rotate(90deg);transform-origin:center}.code-display{background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:10px;font-family:Consolas,Monaco,Courier New,monospace;font-size:.9rem;line-height:1.6;overflow-x:auto;white-space:pre;box-shadow:inset 0 2px 10px #0000004d}.answer-textarea{width:100%;min-height:250px;padding:15px;border:2px solid #dee2e6;border-radius:10px;font-family:Consolas,Monaco,Courier New,monospace;font-size:.9rem;line-height:1.6;resize:vertical;background:#fff;color:#333;transition:all .3s ease}.answer-textarea:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.answer-textarea.locked,.answer-textarea:disabled{background:#f0f0f0;color:#666;cursor:not-allowed;opacity:.7;border-color:#999}.right-panel{display:flex;flex-direction:column;gap:20px;overflow-y:auto}.live-demo-container{position:relative;min-height:150px;display:flex;align-items:center;justify-content:center;background:#f8f9fa;border-radius:10px;padding:30px;border:2px dashed #dee2e6}.target-demo{background:linear-gradient(135deg,#667eea0d,#764ba20d);border-color:#667eea}.demo-label{position:absolute;bottom:10px;left:50%;transform:translate(-50%);background:#000000b3;color:#fff;padding:5px 15px;border-radius:20px;font-size:.85rem;font-weight:600}.target-label{background:#667eeae6}.demo-gradient-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:15px 40px;border:none;border-radius:50px;font-size:18px;font-weight:700;cursor:pointer;box-shadow:0 10px 25px #667eea80;transition:all .3s ease}.demo-gradient-btn:hover{transform:translateY(-3px);box-shadow:0 15px 35px #667eea99}.demo-green-gradient-btn{background:linear-gradient(135deg,#11998e,#38ef7d);color:#fff;padding:15px 40px;border:none;border-radius:50px;font-size:18px;font-weight:700;cursor:pointer;box-shadow:0 10px 25px #11998e80;transition:all .3s ease}.demo-green-gradient-btn:hover{transform:translateY(-3px);box-shadow:0 15px 35px #11998e99}.demo-card{background:#fff;border-radius:15px;padding:30px;box-shadow:0 5px 15px #0000001a;max-width:350px;transition:all .3s ease}.demo-card:hover{box-shadow:0 15px 35px #0003;transform:translateY(-5px)}.demo-card h3{color:#333;margin-bottom:10px;font-size:1.3rem}.demo-card p{color:#666;line-height:1.6}.demo-bordered-card{background:#fff;border-radius:20px;padding:30px;border:3px solid #ff6b6b;max-width:350px;box-shadow:0 5px 15px #ff6b6b33;transition:all .3s ease}.demo-bordered-card:hover{box-shadow:0 15px 35px #ff6b6b4d;transform:translateY(-5px)}.demo-bordered-card h3{color:#333;margin-bottom:10px;font-size:1.3rem}.demo-bordered-card p{color:#666;line-height:1.6}.demo-input-container{width:100%;max-width:350px}.demo-fancy-input{width:100%;padding:12px 15px;border:2px solid #ddd;border-radius:8px;font-size:16px;transition:all .3s ease}.demo-fancy-input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.demo-bottom-border-input{width:100%;padding:12px 15px;border:none;border-bottom:3px solid #ff6b6b;background:transparent;font-size:16px;transition:all .3s ease}.demo-bottom-border-input:focus{outline:none;box-shadow:0 4px 8px #ff6b6b4d}.task-description{background:#fff;padding:15px;border-radius:10px;color:#495057;line-height:1.6;margin-bottom:15px;border-left:4px solid #667eea;font-weight:500}.footer{background:#fffffffa;padding:25px 40px;box-shadow:0 -4px 20px #0000001a}.navigation-buttons{max-width:100%;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:20px}.nav-btn{display:flex;align-items:center;gap:10px;padding:12px 30px;border:none;border-radius:50px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #0000001a}.prev-btn{background:#6c757d;color:#fff}.next-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.lock-btn{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff}.lock-btn.locked{background:linear-gradient(135deg,#11998e,#38ef7d);cursor:not-allowed}.nav-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #0003}.nav-btn:disabled{opacity:.5;cursor:not-allowed}.btn-icon{font-size:1.2rem}.slide-dots{display:flex;gap:12px;align-items:center}.dot{width:14px;height:14px;border-radius:50%;background:#dee2e6;cursor:pointer;transition:all .3s ease;border:2px solid transparent}.dot:hover{transform:scale(1.2)}.dot.active{background:linear-gradient(135deg,#667eea,#764ba2);transform:scale(1.3);border-color:#fff;box-shadow:0 0 0 3px #667eea4d}.dot.completed{background:#38ef7d}@media(max-width:1024px){.content-grid{grid-template-columns:1fr}.header h1{font-size:2rem}.slide-title{font-size:1.5rem}.start-content{padding:40px}.start-title{font-size:2rem}}@media(max-width:768px){.header,.footer,.slide{padding:20px}.navigation-buttons{flex-wrap:wrap}.nav-btn{flex:1;justify-content:center}.slide-dots{width:100%;justify-content:center;order:-1}}