*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}:root{--primary:#34495e;--primary-dark:#2c3e50;--primary-light:#4a5f7f;--accent:#3498db;--accent-hover:#2980b9;--bg-dark:#1a1a2e;--bg-medium:#16213e;--bg-light:#0f3460;--text-primary:#ecf0f1;--text-secondary:#bdc3c7;--success:#2ecc71;--warning:#f39c12;--danger:#e74c3c;--border:#34495e;--shadow:rgba(0,0,0,0.3)}html{font-size:16px;scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,var(--bg-dark) 0%,var(--bg-medium) 100%);color:var(--text-primary);line-height:1.6;min-height:100vh}a{color:var(--accent);text-decoration:none;transition:color .3s ease}a:hover{color:var(--accent-hover)}header{background:var(--primary-dark);border-bottom:3px solid var(--accent);padding:1rem 0;position:sticky;top:0;z-index:1000;box-shadow:0 2px 10px var(--shadow)}nav{max-width:1400px;margin:0 auto;padding:0 1.5rem;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem}.logo{font-size:1.5rem;font-weight:700;color:var(--text-primary);display:flex;align-items:center;gap:.5rem}.logo:hover{color:var(--accent)}.nav-links{display:flex;flex-wrap:wrap;gap:1.5rem;list-style:none}.nav-links a{color:var(--text-secondary);font-weight:500;padding:.5rem 1rem;border-radius:5px;transition:all .3s ease}.nav-links a:hover,.nav-links a.active{background:var(--primary-light);color:var(--text-primary)}.container{max-width:1400px;margin:0 auto;padding:2rem 1.5rem}.hero{text-align:center;padding:3rem 0;border-bottom:2px solid var(--border)}.hero h1{font-size:2.5rem;margin-bottom:1rem;color:var(--text-primary);line-height:1.2}.hero p{font-size:1.1rem;color:var(--text-secondary);max-width:800px;margin:0 auto}.tool-section{background:var(--bg-light);border-radius:10px;padding:2rem;margin:2rem 0;box-shadow:0 4px 20px var(--shadow);border:1px solid var(--border)}.tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin:2rem 0}.color-swatch{width:100%;height:200px;border-radius:10px;border:3px solid var(--border);box-shadow:0 4px 15px var(--shadow);transition:transform .3s ease;margin-bottom:1.5rem}.color-swatch:hover{transform:scale(1.02)}.input-group{margin-bottom:1.5rem}.input-group label{display:block;font-weight:600;margin-bottom:.5rem;color:var(--text-primary);font-size:.95rem}.input-group input[type="text"],.input-group input[type="number"],.input-group input[type="email"],.input-group textarea,.input-group select{width:100%;padding:.75rem;background:var(--bg-medium);border:2px solid var(--border);border-radius:5px;color:var(--text-primary);font-size:1rem;transition:border-color .3s ease}.input-group input:focus,.input-group textarea:focus,.input-group select:focus{outline:none;border-color:var(--accent)}.input-group input[type="range"]{width:100%;height:8px;background:var(--bg-medium);border-radius:5px;outline:none;-webkit-appearance:none}.input-group input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;background:var(--accent);border-radius:50%;cursor:pointer;transition:all .3s ease}.input-group input[type="range"]::-webkit-slider-thumb:hover{background:var(--accent-hover);transform:scale(1.1)}.input-group input[type="range"]::-moz-range-thumb{width:20px;height:20px;background:var(--accent);border-radius:50%;cursor:pointer;border:none;transition:all .3s ease}.input-group input[type="range"]::-moz-range-thumb:hover{background:var(--accent-hover);transform:scale(1.1)}.output-field{position:relative}.output-field input{padding-right:100px}.copy-btn{position:absolute;right:5px;top:50%;transform:translateY(-50%);background:var(--accent);color:white;border:none;padding:.5rem 1rem;border-radius:5px;cursor:pointer;font-weight:600;transition:all .3s ease;font-size:.9rem}.copy-btn:hover{background:var(--accent-hover);transform:translateY(-50%) scale(1.05)}.copy-btn.copied{background:var(--success)}.btn{display:inline-block;padding:.75rem 2rem;background:var(--accent);color:white;border:none;border-radius:5px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;text-align:center}.btn:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 4px 12px var(--shadow)}.btn-secondary{background:var(--primary)}.btn-secondary:hover{background:var(--primary-light)}.content-section{margin:3rem 0;line-height:1.8}.content-section h2{font-size:2rem;margin-bottom:1.5rem;color:var(--text-primary);border-bottom:3px solid var(--accent);padding-bottom:.5rem;display:inline-block}.content-section h3{font-size:1.5rem;margin:2rem 0 1rem;color:var(--text-primary)}.content-section p{margin-bottom:1.5rem;color:var(--text-secondary);font-size:1.05rem}.content-section ul,.content-section ol{margin-left:2rem;margin-bottom:1.5rem;color:var(--text-secondary)}.content-section li{margin-bottom:.75rem}.content-section code{background:var(--bg-medium);padding:.2rem .5rem;border-radius:3px;color:var(--accent);font-family:'Courier New',monospace}.content-section strong{color:var(--text-primary)}.faq-section{margin:3rem 0}.faq-item{background:var(--bg-medium);border-left:4px solid var(--accent);padding:1.5rem;margin-bottom:1.5rem;border-radius:5px}.faq-item h3{font-size:1.2rem;margin-bottom:.75rem;color:var(--text-primary)}.faq-item p{color:var(--text-secondary);margin:0}.disclaimer{background:var(--bg-medium);border-left:4px solid var(--warning);padding:1.5rem;margin:2rem 0;border-radius:5px}.disclaimer strong{color:var(--warning)}.authority-link{display:inline-block;margin:1rem 0;padding:1rem 1.5rem;background:var(--primary);border-radius:5px;border-left:4px solid var(--accent);transition:all .3s ease}.authority-link:hover{background:var(--primary-light);transform:translateX(5px)}footer{background:var(--primary-dark);border-top:3px solid var(--accent);margin-top:4rem;padding:3rem 0}.footer-content{max-width:1400px;margin:0 auto;padding:0 1.5rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}.footer-section h3{margin-bottom:1rem;color:var(--text-primary)}.footer-section ul{list-style:none}.footer-section li{margin-bottom:.5rem}.footer-section a{color:var(--text-secondary)}.footer-section a:hover{color:var(--accent)}.footer-bottom{text-align:center;margin-top:2rem;padding-top:2rem;border-top:1px solid var(--border);color:var(--text-secondary)}.palette-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem;margin:2rem 0}.palette-item{text-align:center;background:var(--bg-medium);padding:1rem;border-radius:8px;border:2px solid var(--border);transition:all .3s ease}.palette-item:hover{transform:translateY(-5px);border-color:var(--accent)}.palette-color{width:100%;height:100px;border-radius:5px;margin-bottom:.75rem;border:2px solid var(--border)}.palette-code{font-family:'Courier New',monospace;color:var(--text-primary);font-weight:600;margin-bottom:.5rem}.canvas-container{position:relative;margin:2rem 0;display:inline-block}.color-canvas{border:3px solid var(--border);border-radius:10px;cursor:crosshair;box-shadow:0 4px 15px var(--shadow)}.slider-value{display:inline-block;min-width:50px;font-weight:600;color:var(--accent);margin-left:1rem}@media(max-width:768px){.hero h1{font-size:2rem}.nav-links{width:100%;justify-content:center}.tool-grid{grid-template-columns:1fr}.footer-content{grid-template-columns:1fr}.content-section h2{font-size:1.6rem}}@media(max-width:480px){html{font-size:14px}.hero h1{font-size:1.75rem}.container{padding:1rem}.tool-section{padding:1.5rem}.copy-btn{position:static;transform:none;margin-top:.5rem;width:100%;display:block}.output-field input{padding-right:.75rem}}