*{margin:0;padding:0;box-sizing:border-box}:root{--primary:#2563eb;--primary-dark:#1e40af;--secondary:#64748b;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--bg-primary:#ffffff;--bg-secondary:#f8fafc;--bg-tertiary:#f1f5f9;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--border:#e2e8f0;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1);--radius:8px;--radius-lg:12px}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:var(--text-primary);background-color:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.site-header{background:var(--bg-primary);border-bottom:1px solid var(--border);padding:1rem 0;position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm)}.header-content{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:.75rem;text-decoration:none;color:var(--text-primary);font-weight:700;font-size:1.25rem}.logo svg{width:32px;height:32px;color:var(--primary)}.main-nav{display:flex;gap:2rem;align-items:center}.nav-link{color:var(--text-secondary);text-decoration:none;font-weight:500;font-size:.95rem;transition:color .2s ease;position:relative}.nav-link:hover,.nav-link.active{color:var(--primary)}.nav-link.active:after{content:"";position:absolute;bottom:-1.5rem;left:0;right:0;height:2px;background:var(--primary)}.hero-section{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:4rem 1.5rem;text-align:center}.hero-content{max-width:800px;margin:0 auto}.hero-title{font-size:3rem;font-weight:800;margin-bottom:1rem;line-height:1.2}.hero-subtitle{font-size:1.25rem;opacity:.95;margin-bottom:2rem;line-height:1.6}.hero-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.btn-primary{background:#fff;color:var(--primary);padding:.875rem 2rem;border-radius:var(--radius);text-decoration:none;font-weight:600;display:inline-block;transition:transform .2s ease,box-shadow .2s ease;border:none;cursor:pointer;font-size:1rem}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background:#fff3;color:#fff;padding:.875rem 2rem;border-radius:var(--radius);text-decoration:none;font-weight:600;display:inline-block;transition:background .2s ease;border:1px solid rgba(255,255,255,.3);cursor:pointer;font-size:1rem}.btn-secondary:hover{background:#ffffff4d}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.tools-section{padding:4rem 0;background:var(--bg-secondary)}.section-title{font-size:2rem;font-weight:700;margin-bottom:3rem;text-align:center;color:var(--text-primary)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}.tool-card{background:var(--bg-primary);border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow-md);transition:transform .2s ease,box-shadow .2s ease;border:1px solid var(--border)}.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.tool-icon{width:56px;height:56px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem}.tool-icon svg{width:28px;height:28px;color:#fff}.tool-title{font-size:1.25rem;font-weight:600;margin-bottom:.75rem;color:var(--text-primary)}.tool-desc{color:var(--text-secondary);margin-bottom:1.5rem;line-height:1.6}.tool-link{color:var(--primary);text-decoration:none;font-weight:600;display:inline-flex;align-items:center;gap:.5rem;transition:gap .2s ease}.tool-link:hover{gap:.75rem}.education-preview{padding:4rem 0;background:var(--bg-primary)}.education-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.edu-card{background:var(--bg-secondary);border-radius:var(--radius-lg);padding:2rem;border:1px solid var(--border);transition:border-color .2s ease}.edu-card:hover{border-color:var(--primary)}.edu-title{font-size:1.25rem;font-weight:600;margin-bottom:.75rem;color:var(--text-primary)}.edu-desc{color:var(--text-secondary);margin-bottom:1.5rem;line-height:1.6}.edu-link{color:var(--primary);text-decoration:none;font-weight:600;display:inline-flex;align-items:center;gap:.5rem}.content-page{padding:3rem 0;min-height:calc(100vh - 200px)}.page-title{font-size:2.5rem;font-weight:700;margin-bottom:1rem;color:var(--text-primary)}.page-subtitle{font-size:1.125rem;color:var(--text-secondary);margin-bottom:3rem}.content-card{background:var(--bg-primary);border-radius:var(--radius-lg);padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow-md);border:1px solid var(--border)}.content-card h2{font-size:1.75rem;font-weight:600;margin-bottom:1rem;color:var(--text-primary)}.content-card h3{font-size:1.5rem;font-weight:600;margin-top:2rem;margin-bottom:1rem;color:var(--text-primary)}.content-card p{color:var(--text-secondary);line-height:1.8;margin-bottom:1rem}.content-card ul{margin-left:1.5rem;margin-bottom:1rem}.content-card li{color:var(--text-secondary);line-height:1.8;margin-bottom:.5rem}.content-card a{color:var(--primary);text-decoration:none}.content-card a:hover{text-decoration:underline}.calculator-section{margin-bottom:4rem}.calculator-form{background:var(--bg-primary);border-radius:var(--radius-lg);padding:2.5rem;box-shadow:var(--shadow-md);border:1px solid var(--border)}.calculator-form h2{font-size:1.75rem;font-weight:600;margin-bottom:1rem;color:var(--text-primary)}.form-group{margin-bottom:1.5rem}.form-label{display:block;font-weight:500;margin-bottom:.5rem;color:var(--text-primary)}.form-input{width:100%;padding:.875rem;border:1px solid var(--border);border-radius:var(--radius);font-size:1rem;transition:border-color .2s ease,box-shadow .2s ease}.form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.calculate-btn{background:var(--primary);color:#fff;padding:.875rem 2rem;border:none;border-radius:var(--radius);font-weight:600;font-size:1rem;cursor:pointer;transition:background .2s ease,transform .2s ease;width:100%}.calculate-btn:hover{background:var(--primary-dark);transform:translateY(-1px)}.result-box{margin-top:2rem;padding:1.5rem;background:var(--bg-secondary);border-radius:var(--radius);border:1px solid var(--border)}.result-label{font-size:.875rem;color:var(--text-muted);margin-bottom:.5rem}.result-value{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.site-footer{background:var(--bg-secondary);border-top:1px solid var(--border);padding:3rem 0 2rem;margin-top:4rem}.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;margin-bottom:2rem}.footer-section h4{font-size:1rem;font-weight:600;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);text-decoration:none;transition:color .2s ease}.footer-section a:hover{color:var(--primary)}.footer-bottom{text-align:center;padding-top:2rem;border-top:1px solid var(--border);color:var(--text-muted);font-size:.875rem}.company-info{margin:1.5rem 0;padding:1.5rem;background:var(--bg-primary);border-radius:var(--radius);border:1px solid var(--border)}.company-info h4{font-size:1rem;font-weight:600;margin-bottom:.75rem;color:var(--text-primary)}.company-info p{color:var(--text-secondary);margin-bottom:.5rem;line-height:1.6}.footer-note{margin-top:1rem;font-size:.875rem;color:var(--text-muted);line-height:1.6}@media(max-width:768px){.hero-title{font-size:2rem}.hero-subtitle{font-size:1.125rem}.main-nav{gap:1rem;font-size:.875rem}.tools-grid,.education-grid{grid-template-columns:1fr}.page-title{font-size:2rem}}