:root{--bg:#f7fafc;--panel:#fff;--text:#172033;--muted:#64748b;--border:#e2e8f0;--brand:#263b8f;--accent:#f59e0b;--green:#16a34a;--shadow:0 12px 34px rgba(15,23,42,.08)}
*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text);line-height:1.65}
a{color:#1d4ed8;text-decoration:none}a:hover{text-decoration:underline}
header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.header-inner{max-width:1180px;margin:0 auto;padding:15px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{font-size:30px;font-weight:900;color:var(--brand);letter-spacing:-1px}.logo span{color:var(--accent)}
nav{display:flex;gap:15px;flex-wrap:wrap;justify-content:flex-end}nav a{font-weight:700;color:#334155;font-size:14px}
.hero{background:linear-gradient(135deg,#263b8f,#1e293b);color:#fff;padding:44px 22px;text-align:center}.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.05;margin:0 0 14px}.hero p{max-width:820px;margin:0 auto;font-size:19px;color:#e2e8f0}
.container{max-width:1180px;margin:0 auto;padding:34px 22px}.tool-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);gap:22px;align-items:start}
.card,article,.tool-panel,.notice{background:var(--panel);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow);padding:24px}
textarea,input,select{width:100%;padding:14px;border:1px solid #cbd5e1;border-radius:12px;font-size:17px}label{font-weight:800;display:block;margin:12px 0 6px}
button,.btn{display:inline-block;background:var(--green);color:#fff;border:0;border-radius:12px;padding:13px 18px;font-weight:900;cursor:pointer;text-align:center}button:hover,.btn:hover{background:#15803d;text-decoration:none}.btn.secondary{background:#eef2ff;color:#263b8f}.btn.secondary:hover{background:#dbeafe}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}.results{min-height:300px}.result-chip,.word-pill{display:inline-block;margin:5px;padding:8px 11px;border:1px solid var(--border);border-radius:999px;background:#f8fafc;font-weight:700}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:18px}.card h3{margin-top:0}.small{font-size:14px;color:var(--muted)}
.article-layout{max-width:1180px;margin:0 auto;padding:34px 22px;display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px}article h1{font-size:clamp(32px,4vw,48px);line-height:1.08;margin-top:0;color:#111827}article h2{margin-top:34px;color:#111827}
.sidebar{position:sticky;top:96px;align-self:start}.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:18px}.faq-item{border-bottom:1px solid var(--border);padding:14px 0}.faq-item h3{margin:0 0 7px}
.example-table{overflow-x:auto}.example-table table{width:100%;border-collapse:collapse}.example-table th,.example-table td{border:1px solid var(--border);padding:12px;text-align:left}.example-table th{background:#f1f5f9}
.content-callout{border-left:5px solid var(--accent);background:#fffbeb;padding:18px;border-radius:12px;margin:22px 0}
footer{background:#0f172a;color:#cbd5e1;margin-top:36px;padding:34px 22px}footer a{color:#bfdbfe}.footer-grid{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}footer h3{color:#fff}
@media(max-width:860px){.header-inner{flex-direction:column;align-items:flex-start}.tool-grid,.article-layout{grid-template-columns:1fr}.sidebar{position:static}}