:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}*{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}.app{width:100%;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;background:#fffffff2;box-shadow:0 0 30px #0000001a}.header{background:linear-gradient(135deg,#2c3e50,#3498db);color:#fff;padding:2rem;text-align:center;box-shadow:0 2px 10px #0000001a}.header h1{font-size:2.5rem;margin-bottom:.5rem;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.subtitle{font-size:1.1rem;opacity:.9;font-weight:300}.nav{background:#34495e;padding:1rem;display:flex;justify-content:center;flex-wrap:wrap;gap:.5rem;box-shadow:0 2px 5px #0000001a}.nav-button{background:#2c3e50;color:#fff;border:none;padding:.8rem 1.5rem;border-radius:25px;cursor:pointer;font-size:.9rem;font-weight:500;transition:all .3s ease;display:flex;align-items:center;gap:.5rem;min-width:140px;justify-content:center}.nav-button:hover{background:#3498db;transform:translateY(-2px);box-shadow:0 4px 12px #0003}.nav-button.active{background:#e74c3c;box-shadow:0 4px 12px #e74c3c4d}.nav-icon{font-size:1.2rem}.main-content{flex:1;padding:2rem;background:#fff}.section{margin:0 auto;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.section h2{color:#2c3e50;font-size:2rem;margin-bottom:1.5rem;text-align:center;position:relative;padding-bottom:1rem}.section h2:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%);width:50px;height:3px;background:#e74c3c;border-radius:2px}.content{line-height:1.6;font-size:1.1rem}.content p{margin-bottom:1.5rem;text-align:justify}.content h3{color:#2c3e50;font-size:1.4rem;margin:2rem 0 1rem;padding-bottom:.5rem;border-bottom:2px solid #ecf0f1}.step-section{background:#f8f9fa;padding:1.5rem;margin:1.5rem 0;border-radius:10px;border-left:4px solid #3498db;box-shadow:0 2px 10px #0000000d}.step-section h3{color:#2c3e50;margin-top:0;margin-bottom:1rem;font-size:1.3rem;border-bottom:none}.materials-list{list-style:none;padding:0}.materials-list li{background:#f8f9fa;padding:1rem;margin:.5rem 0;border-radius:8px;border-left:4px solid #3498db;transition:all .3s ease}.materials-list li:hover{background:#d5dbdb;transform:translate(5px)}.step-section ul{padding-left:1.5rem}.step-section li{margin:.5rem 0;line-height:1.5}.note{background:#e8f4f8;border:1px solid #3498db;border-radius:8px;padding:1rem;margin:1rem 0;border-left:4px solid #3498db}.caution{background:#fdf2e9;border:1px solid #e67e22;border-radius:8px;padding:1rem;margin:1rem 0;border-left:4px solid #e67e22}.note strong,.caution strong{color:#2c3e50}.footer{background:#2c3e50;color:#fff;text-align:center;padding:1.5rem;margin-top:auto}.footer p{margin:0;font-size:.9rem;opacity:.8}@media (max-width: 768px){.header h1{font-size:2rem}.nav{flex-direction:column;align-items:center}.nav-button{width:100%;max-width:300px}.main-content{padding:1rem}.section h2{font-size:1.5rem}.content{font-size:1rem}.step-section{padding:1rem}}@media (max-width: 480px){.header{padding:1rem}.header h1{font-size:1.5rem}.subtitle{font-size:1rem}.nav-button{padding:.6rem 1rem;font-size:.8rem}.nav-icon{font-size:1rem}}html{scroll-behavior:smooth}::selection{background:#3498db;color:#fff}::-moz-selection{background:#3498db;color:#fff}.materials-photos{display:flex;justify-content:space-around;gap:20px;margin:2rem 0;flex-wrap:wrap}.materials-photos figure{display:flex;flex-direction:column;align-items:center;margin:0 0 30px;width:auto;min-width:200px;max-width:280px;flex:0 1 auto}.materials-photos img{width:auto;max-width:100%;height:220px;border-radius:8px;box-shadow:0 4px 8px #0000001a;transition:transform .3s ease,box-shadow .3s ease;object-fit:contain}.materials-photos img:hover{transform:translateY(-5px);box-shadow:0 8px 16px #0003}.materials-photos figcaption{margin-top:8px;font-size:.9rem;color:#555;text-align:center;font-weight:500}@media (min-width: 1200px){.materials-photos{justify-content:center}.materials-photos figure{flex:0 0 30%;margin:0 10px 30px}}@media (max-width: 992px){.materials-photos{justify-content:center}.materials-photos figure{flex:0 0 45%;margin:0 10px 30px}}@media (max-width: 768px){.materials-photos figure{flex:0 0 100%;max-width:350px}}.step-section figure{display:flex;flex-direction:column;align-items:center;margin:1rem 0;width:auto;min-width:200px;max-width:280px;flex:0 1 auto}.step-section img{width:auto;max-width:100%;height:220px;border-radius:8px;box-shadow:0 4px 8px #0000001a;transition:transform .3s ease,box-shadow .3s ease;object-fit:contain;margin:0}.step-section img:hover{transform:translateY(-5px);box-shadow:0 8px 16px #0003}.step-section .image-grid{display:flex;justify-content:space-around;gap:20px;margin:1rem 0;flex-wrap:wrap}.step-section figcaption{margin-top:8px;font-size:.9rem;color:#555;text-align:center;font-weight:500}@media (max-width: 480px){.materials-photos,.step-section .image-grid{flex-direction:column;align-items:center}.materials-photos figure,.step-section figure{max-width:100%}.materials-photos img,.step-section img{max-height:200px}}