:root{--bg:#f6f8fb;--card:#fff;--text:#142033;--muted:#637083;--primary:#2563eb;--primary2:#7c3aed;--border:#e4e8ef;--soft:#eef4ff;--shadow:0 16px 45px rgba(20,32,51,.08);--radius:20px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.65}a{color:inherit;text-decoration:none}.container{width:min(1120px,92%);margin:auto}header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-weight:850;font-size:1.15rem;display:flex;align-items:center;gap:10px}.brand-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--primary),var(--primary2));display:grid;place-items:center;color:#fff;font-weight:900}.navlinks{display:flex;gap:20px;color:#536174;font-weight:650}.navlinks a:hover{color:var(--primary)}.hero{padding:70px 0 38px;background:radial-gradient(circle at 10% 10%,#e6efff 0,transparent 34%),radial-gradient(circle at 90% 20%,#efe8ff 0,transparent 30%)}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:38px;align-items:center}.eyebrow{color:var(--primary);font-weight:800;text-transform:uppercase;letter-spacing:.09em;font-size:.78rem}.hero h1{font-size:clamp(2.3rem,5vw,4.25rem);line-height:1.05;letter-spacing:-.055em;margin:12px 0 18px}.hero p{font-size:1.08rem;color:var(--muted);max-width:690px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.calculator{padding:24px}.calculator h2{margin-top:0}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field label{display:block;font-size:.82rem;font-weight:800;margin-bottom:7px;color:#4d5a6d}.field input,.field select{width:100%;height:48px;border:1px solid #d7ddea;border-radius:12px;padding:0 13px;font-size:1rem;background:#fff;color:var(--text);outline:none}.field input:focus,.field select:focus{border-color:var(--primary);box-shadow:0 0 0 4px #2563eb18}.full{grid-column:1/-1}.btn{border:0;border-radius:12px;height:48px;padding:0 18px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;font-size:1rem;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.btn.secondary{background:#edf2ff;color:#2451b8}.actions{display:flex;gap:10px;margin-top:15px;flex-wrap:wrap}.result{margin-top:18px;padding:18px;border-radius:15px;background:var(--soft);border:1px solid #dbe7ff}.result strong{font-size:1.4rem;display:block}.small{font-size:.88rem;color:var(--muted)}section{padding:48px 0}.section-head{margin-bottom:22px}.section-head h2{margin:0;font-size:1.8rem}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.link-card{padding:18px;transition:.2s}.link-card:hover{transform:translateY(-2px);border-color:#bfd0ff}.link-card h3{margin:0 0 5px;font-size:1rem}.link-card p{margin:0;color:var(--muted);font-size:.9rem}.content{padding:30px}.content h2{margin-top:30px}.content h3{margin-top:24px}.content ul{padding-left:20px}.note{padding:15px 17px;border-left:4px solid var(--primary);background:#f4f7ff;border-radius:10px;color:#4f5c70}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse;margin:16px 0}.table th,.table td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left}.table th{background:#f7f9fc}.breadcrumb{padding-top:24px;color:var(--muted);font-size:.9rem}.page-hero{padding:25px 0 10px}.page-hero h1{font-size:clamp(2rem,4vw,3.1rem);line-height:1.1;letter-spacing:-.045em;margin:8px 0}.page-hero p{color:var(--muted);max-width:800px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}footer{margin-top:40px;background:#111827;color:#c7cfdb;padding:45px 0}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}.footer-title{color:#fff;font-weight:800;margin-bottom:10px}.footer-links{display:grid;gap:7px}.footer-links a:hover{color:#fff}.copyright{border-top:1px solid #273244;margin-top:28px;padding-top:18px;font-size:.85rem}@media(max-width:800px){.hero-grid,.two-col{grid-template-columns:1fr}.grid{grid-template-columns:1fr 1fr}.navlinks{display:none}.hero{padding-top:45px}}@media(max-width:520px){.grid{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.hero h1{font-size:2.45rem}.calculator,.content{padding:18px}} 
.feedback-form{display:grid;gap:16px}.feedback-form textarea{width:100%;resize:vertical}.feedback-form .field{margin:0}.feedback-form input,.feedback-form textarea{box-sizing:border-box}.feedback-form button{justify-self:start}