:root{--primary:#1f2937;--primary-light:#374151;--accent:#2563eb;--background:#f8fafc;--surface:#fff;--text:#111827;--text-light:#6b7280;--border:#e5e7eb;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;font-weight:400;line-height:1.7}*,:before,:after{box-sizing:border-box}body{background-color:var(--background);min-width:320px;min-height:100vh;color:var(--text);margin:0}#root{max-width:1100px;margin:0 auto;padding:1rem}.container{padding:1rem}h1{text-align:center;word-break:break-word;margin-bottom:1rem;font-size:clamp(2rem,5vw,3rem);line-height:1.2}h2{margin-top:2rem;margin-bottom:1rem;font-size:2rem}h3{margin-bottom:.5rem;font-size:1.4rem}p{margin-top:0}a{color:var(--accent);text-decoration:none;transition:color .2s,background-color .2s}a:hover{color:#1d4ed8;text-decoration:underline}.main{flex-direction:column;display:flex}.main a{color:var(--accent)}.main a:hover{color:#1d4ed8}.main section{background-color:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:1.5rem;padding:1.5rem;box-shadow:0 1px 2px #0000000d,0 4px 12px #0000000a}.table-contents li{margin-bottom:.5rem;list-style-type:none}.video-container{width:100%;height:0;padding-bottom:56.25%;position:relative}.video-container iframe{border:0;border-radius:8px;width:100%;height:100%;position:absolute;inset:0}nav{background-color:var(--primary);border-radius:12px;margin-bottom:2rem;padding:1rem}.navbar{justify-content:center;align-items:center;display:flex}.navbar a,.navbar a:link{color:#d1d5db}.navbar a:hover{color:#fff;text-decoration:none}.nav-menu{gap:2rem;margin:0;padding:0;list-style:none;display:flex}.navbar-toggle{display:none}.contact-form{background:var(--surface);border:1px solid var(--border);border-radius:12px;max-width:600px;margin:0 auto;padding:2rem;box-shadow:0 1px 2px #0000000d,0 4px 12px #0000000a}.form-group{align-items:center;margin-bottom:1rem;display:flex}.form-group label{margin-right:10px}.form-group input,.form-group textarea{border:1px solid var(--border);border-radius:8px;flex:1;padding:.75rem;font-family:inherit;font-size:1rem}.form-group input:focus,.form-group textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px #2563eb26}button{font-family:inherit}button[type=submit]{background-color:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:.85rem;font-size:1rem;font-weight:600;transition:background-color .2s;display:block}button[type=submit]:hover:not(:disabled){background-color:#1d4ed8}button:disabled{color:#fff;cursor:not-allowed;background-color:#ccc}.success-message{color:#16a34a;margin-top:1rem}.error-message{color:#dc2626;margin-top:1rem}.main-footer{background-color:var(--primary);color:#d1d5db;text-align:center;border-radius:12px 12px 0 0;margin-top:3rem;padding:2rem}.main-footer a{color:#d1d5db}.main-footer a:hover{color:#fff}.main-footer p{color:#d1d5db}.main-footer ul{margin:0;padding:0;list-style:none}.main-footer ul li{margin:0 .75rem;display:inline}@media screen and (width<=600px){.navbar{flex-direction:column;align-items:stretch}.navbar-toggle{color:#d1d5db;cursor:pointer;background-color:#0000;border:none;margin-left:auto;padding:.5rem;font-size:1.5rem;display:block}.navbar-toggle:hover{color:#fff}.nav-menu{flex-direction:column;gap:0;width:100%;margin-top:.5rem;display:none}.nav-menu.open{display:flex}.nav-menu li{width:100%}.nav-menu a{text-align:left;border-top:1px solid #ffffff1a;width:100%;padding:.75rem 0;display:block}.navbar a{-webkit-tap-highlight-color:transparent}.form-group{flex-direction:column;align-items:stretch}.form-group label{margin-bottom:.5rem;margin-right:0}}