:root{--primary: #10b981;--primary-hover: #059669;--dark: #0f172a;--dark-muted: #1e293b;--light: #f8fafc;--border: #e2e8f0;--text: #334155;--text-light: #64748b;--warning: #e74c3c;--info: #3498db;--accent: #f39c12;--z-navbar: 1000;--z-dropdown: 1001;--z-menu-btn: 1001;--transition-fast: 0.2s;--transition-normal: 0.3s;--transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);--shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);--shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);--shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);--shadow-card: 0 12px 24px -10px rgba(0, 0, 0, 0.1);--shadow-navbar: 0 2px 10px rgba(0, 0, 0, 0.1);--shadow-dropdown: 0px 8px 16px rgba(0, 0, 0, 0.4);--spacing-xs: 8px;--spacing-sm: 12px;--spacing-md: 20px;--spacing-lg: 30px;--spacing-xl: 60px;--spacing-2xl: 80px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-pill: 20px;--radius-circle: 50%;--font-size-xs: 0.75rem;--font-size-sm: 0.85rem;--font-size-base: 1rem;--font-size-md: 0.9rem;--font-size-lg: 1.1rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 2rem;--font-size-4xl: 2.5rem;--font-size-5xl: 3rem;--container-sm: 1100px;--container-md: 1200px}*{margin:0;padding:0;box-sizing:border-box}html,body{max-width:100%;overflow-x:hidden;margin:0;padding:0}body{font-family:'Inter', -apple-system, system-ui, sans-serif;background-color:var(--light);color:var(--text);line-height:1.6;padding-top:var(--spacing-md)}body.sidebar-open{overflow:hidden}.container{max-width:var(--container-sm);margin:0 auto;padding:0 var(--spacing-md)}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--dark)}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}p{margin-bottom:1rem}a{color:var(--primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--primary-hover)}.text-center{text-align:center}.mt-1{margin-top:0.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mb-1{margin-bottom:0.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.navbar{background:var(--dark-muted);border-bottom:3px solid var(--dark-muted);width:100%;position:fixed !important;top:0;z-index:var(--z-navbar);display:flex;flex-direction:column;gap:var(--spacing-xs);overflow:visible !important;box-shadow:var(--shadow-navbar)}.navbar .container{max-width:var(--container-md);margin:0 auto;width:100%;display:flex;justify-content:space-between;align-items:center;box-sizing:border-box;overflow:visible !important;padding:0 var(--spacing-md);height:auto}.logo{color:var(--primary) !important;font-weight:800;font-size:1.3rem;text-decoration:none;display:flex;align-items:center;gap:var(--spacing-xs)}.nav-links{list-style:none;display:flex;align-items:center;gap:var(--spacing-md);margin:0;padding:0}.nav-links a{color:var(--light) !important;text-decoration:none;font-weight:600;font-size:var(--font-size-md);transition:var(--transition-fast)}.nav-links a:hover{color:var(--primary) !important}.nav-links li a[href*="CV.pdf"]{border:1px solid var(--primary);padding:5px var(--spacing-sm);border-radius:var(--radius-sm);transition:var(--transition-fast)}.nav-links li a[href*="CV.pdf"]:hover{background:var(--primary);color:var(--dark) !important}.dropdown{position:relative;display:flex;align-items:center;gap:var(--spacing-xs);cursor:pointer}.nav-label{color:var(--light);font-size:var(--font-size-sm);font-weight:500}.dropbtn{background:transparent;color:var(--light);border:none;cursor:pointer;font-size:var(--font-size-lg);padding:var(--spacing-xs) var(--spacing-sm);border-radius:5px;transition:var(--transition-fast)}.dropbtn:hover{background:rgba(255,255,255,0.1)}.dropdown-content{display:none;position:absolute;top:100%;right:0;background:var(--dark);min-width:150px;box-shadow:var(--shadow-lg);z-index:var(--z-dropdown);border-radius:var(--radius-md);overflow:hidden}.dropdown-content::before{content:"";position:absolute;top:-20px;left:0;right:0;height:20px}.dropdown-content.show{display:block !important}.dropdown:hover .dropdown-content{display:block}@media (max-width: 768px), (hover: none){.dropdown:hover .dropdown-content{display:none}}.dropdown-content a{color:var(--light) !important;padding:var(--spacing-sm) 16px;text-decoration:none;display:block;transition:var(--transition-fast);font-size:var(--font-size-md)}.dropdown-content a:hover{background:var(--primary);color:var(--dark) !important}.menu-btn{display:none;position:fixed;top:10px;left:10px;z-index:var(--z-dropdown);background:var(--dark-muted);color:var(--primary);border:2px solid var(--primary);padding:10px var(--spacing-md);font-size:var(--font-size-base);font-weight:700;cursor:pointer;border-radius:var(--radius-md);transition:var(--transition-normal)}.menu-btn:hover{background:var(--primary);color:var(--dark)}.sidebar-mobile{height:100%;width:0;position:fixed;z-index:var(--z-sidebar);top:0;left:0;background-color:var(--dark);overflow-x:hidden;transition:var(--transition-normal);padding-top:var(--spacing-xl)}.sidebar-mobile.open{width:250px}.sidebar-mobile a{padding:15px 25px;text-decoration:none;font-size:var(--font-size-base);color:var(--light);display:block;transition:var(--transition-normal);border-bottom:1px solid var(--dark-muted)}.sidebar-mobile a:hover{color:var(--primary);background:var(--dark-muted)}.close-btn{position:absolute;top:10px;right:25px;font-size:2.5rem !important;color:var(--primary) !important}footer{background:var(--dark-muted);color:var(--light);text-align:center;padding:var(--spacing-lg) var(--spacing-md);margin-top:var(--spacing-xl);border-top:3px solid var(--primary)}footer p{margin:5px 0;font-size:var(--font-size-md)}footer a{color:var(--primary);text-decoration:none;transition:var(--transition-fast)}footer a:hover{color:var(--primary-hover)}@media (max-width: 768px){.navbar{display:none}.menu-btn{display:block}body{padding-top:var(--spacing-xl)}}@media (min-width: 769px){.menu-btn,.sidebar-mobile{display:none !important}}.hero{background:linear-gradient(135deg, var(--dark) 0%, var(--dark-muted) 100%);color:var(--light);padding:var(--spacing-2xl) var(--spacing-md);text-align:center;margin-bottom:40px}.hero h1{color:var(--primary);font-size:var(--font-size-5xl);margin-bottom:15px}.hero p{font-size:1.2rem;max-width:700px;margin:0 auto;color:var(--text-light)}.demo-section{padding:0 0}.demo-section h2,.demo-section h3{color:var(--dark);margin-bottom:var(--spacing-md)}.category-card{background:white;padding:var(--spacing-lg);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-bottom:var(--spacing-lg);transition:transform 0.3s, box-shadow 0.3s}.category-card:hover{transform:translateY(-5px);box-shadow:0 10px 20px rgba(0,0,0,0.15)}.section-description{color:var(--text-light);font-size:1.05rem;line-height:1.7;margin-bottom:25px}.btn{display:inline-block;padding:var(--spacing-sm) var(--spacing-lg);background:var(--primary);color:white;border:none;border-radius:var(--radius-md);font-size:var(--font-size-base);font-weight:600;cursor:pointer;transition:all var(--transition-normal) ease;text-decoration:none}.btn:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 6px 20px rgba(16,185,129,0.4)}.btn:active{transform:translateY(0)}.btn:disabled{opacity:0.6;cursor:not-allowed}.btn-secondary{background:var(--dark-muted)}.btn-secondary:hover{background:var(--dark)}.form-group{margin-bottom:var(--spacing-md)}.form-group label{display:block;font-weight:600;color:var(--dark);margin-bottom:8px;font-size:0.95rem}.form-input,.form-textarea{width:100%;padding:var(--spacing-sm) 16px;border:2px solid var(--border);border-radius:var(--radius-md);font-size:var(--font-size-base);font-family:inherit;transition:all var(--transition-normal) ease;background:white}.form-input:focus,.form-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(16,185,129,0.1)}.form-input.error{border-color:var(--warning)}.form-input.success{border-color:var(--primary)}.form-error{color:var(--warning);font-size:var(--font-size-sm);margin-top:5px;display:none}.form-error.visible{display:block}.form-response{padding:15px;border-radius:var(--radius-md);font-weight:500;text-align:center;display:none;animation:slideIn 0.3s ease}.form-response.visible{display:block}.success-msg{background:#e8f5e9;color:#2e7d32;border:2px solid #4CAF50}.error-msg{background:#ffebee;color:#c62828;border:2px solid #f44336}table{width:100%;border-collapse:collapse;margin:var(--spacing-md) 0;background:white;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm)}thead{background:var(--dark-muted);color:var(--light)}th,td{padding:var(--spacing-sm) 20px;text-align:left;border-bottom:1px solid var(--border)}th{font-weight:700;text-transform:uppercase;font-size:var(--font-size-sm)}tr:hover{background:#f5f5f5}pre,code{font-family:'Courier New', monospace;background:var(--dark);color:var(--primary);border-radius:6px}pre{padding:var(--spacing-md);overflow-x:auto;margin:var(--spacing-md) 0}code{padding:2px 6px}pre code{padding:0}.badge{display:inline-block;padding:4px 12px;border-radius:var(--radius-pill);font-size:0.8rem;font-weight:600;background:var(--primary);color:white}.badge-info{background:var(--info)}.badge-warning{background:var(--warning)}.badge-dark{background:var(--dark)}.grid-2{display:grid;grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));gap:var(--spacing-lg);margin:var(--spacing-lg) 0}.grid-3{display:grid;grid-template-columns:repeat(auto-fit, minmax(250px, 1fr));gap:25px;margin:var(--spacing-lg) 0}@keyframes slideIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.spinner{display:inline-block;width:18px;height:18px;border:3px solid rgba(255,255,255,0.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}.alert{padding:15px var(--spacing-md);border-radius:var(--radius-md);margin:var(--spacing-md) 0;font-weight:500}.alert-success{background:#e8f5e9;color:#2e7d32;border-left:4px solid #4CAF50}.alert-warning{background:#fff3e0;color:#e65100;border-left:4px solid #ff9800}.alert-error{background:#ffebee;color:#c62828;border-left:4px solid #f44336}.alert-info{background:#e3f2fd;color:#1565c0;border-left:4px solid #2196f3}@media (max-width: 768px){.hero h1{font-size:2rem}.hero p{font-size:var(--font-size-base)}.grid-2,.grid-3{grid-template-columns:1fr}table{font-size:0.9rem}th,td{padding:8px 10px}}html{scroll-behavior:smooth}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}@media print{.navbar,.sidebar-mobile,footer,.menu-btn{display:none !important}body{background:white;color:black}}