:root{--bg:#f6f8fb;--card:#fff;--primary:#4f7cff;--text:#1f2937;--muted:#6b7280;--border:#e5e7eb;--radius:14px}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Inter,sans-serif;line-height:1.6;margin:0}header{padding:20px;text-align:center}header h1{font-size:2.2rem;margin:0}header p{color:var(--muted);margin:10px auto 0;max-width:720px}main{display:grid;gap:24px;grid-template-columns:1fr;margin:0 auto;max-width:1100px;padding:20px}.card{background:var(--card);border-radius:var(--radius);box-shadow:0 10px 30px rgba(0,0,0,.04);padding:24px}.card h2{margin-top:0}.calculator{align-items:end;display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}label{color:var(--muted);font-size:.9rem}input,select{border:1px solid var(--border);border-radius:10px;font-size:1rem;margin-top:6px;padding:12px 14px;width:100%}button{background:var(--primary);border:none;border-radius:12px;color:#fff;cursor:pointer;font-size:1rem;padding:14px}button:hover{opacity:.95}.result{display:none;margin-top:20px}.quick-summary{background:#f0f5ff;border:1px solid #dbe6ff;border-radius:14px;margin-top:16px;padding:16px}.quick-summary-inner{align-items:center;display:flex;gap:14px}.quick-icon{align-items:center;display:flex;flex-shrink:0;height:40px;justify-content:center;width:40px}.grid-2{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}table{border-collapse:collapse;font-size:.95rem;width:100%}td,th{border-bottom:1px solid var(--border);padding:10px;text-align:left}th{background:#f9fafb}footer{color:var(--muted);font-size:.9rem;padding:30px 20px;text-align:center}@media (max-width:767px){header h1{font-size:1.6rem}}@media (max-width:380px){header p{display:none}}.toast{background:#1f2937;border-radius:12px;bottom:20px;box-shadow:0 10px 30px rgba(0,0,0,.15);color:#fff;font-size:.95rem;left:50%;opacity:0;padding:14px 20px;pointer-events:none;position:fixed;transform:translateX(-50%);transition:opacity .3s ease,transform .3s ease;z-index:1000}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}