:root{--color-primary: #005AAB;--color-primary-dark: #00417a;--color-accent: #0f9f88;--color-warning: #b45309;--color-text: #162033;--color-muted: #5f6f85;--color-line: #d9e2ec;--color-soft: #f4f8fc;--color-white: #ffffff;--shadow: 0 18px 45px rgba(22, 32, 51, .1);font-family:Inter,Noto Sans Thai,Segoe UI,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;color:var(--color-text);background:var(--color-soft)}*{box-sizing:border-box}body{margin:0;min-width:320px;background:linear-gradient(135deg,#005aab1f,#0f9f8814 42%,#ffffffe0),var(--color-soft)}input{font:inherit}.site-shell{min-height:100vh}.hero{padding:56px 20px 34px;color:var(--color-white);background:linear-gradient(135deg,#005aabf5,#00417ae0),radial-gradient(circle at 86% 18%,rgba(15,159,136,.38),transparent 32%)}.hero__content,.calculator-section,.content-section,footer{width:min(1120px,calc(100% - 40px));margin:0 auto}.eyebrow{margin:0 0 10px;color:inherit;font-size:.82rem;font-weight:800;letter-spacing:0;text-transform:uppercase}h1,h2,h3,p{margin-top:0}h1{max-width:780px;margin-bottom:14px;font-size:clamp(2rem,7vw,4rem);line-height:1.08;letter-spacing:0}h2{margin-bottom:14px;font-size:clamp(1.45rem,3vw,2rem);line-height:1.25;letter-spacing:0}h3{margin-bottom:8px;font-size:1.08rem;line-height:1.35;letter-spacing:0}.hero__lead{max-width:680px;margin-bottom:18px;font-size:clamp(1rem,2.5vw,1.25rem);line-height:1.75}.official-note{display:inline-flex;max-width:760px;margin:0;padding:10px 14px;border:1px solid rgba(255,255,255,.35);border-radius:8px;background:#ffffff1f;font-weight:700;line-height:1.6}.calculator-section{padding:28px 0 24px}.calculator-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(280px,.6fr);gap:18px;align-items:stretch}.calculator-card,.summary-panel{border:1px solid var(--color-line);border-radius:8px;background:var(--color-white);box-shadow:var(--shadow)}.calculator-card{padding:24px}.section-heading .eyebrow{color:var(--color-primary)}.calculator-form{display:grid;gap:10px;margin:20px 0}.calculator-form label{font-weight:800}.input-row{display:grid;grid-template-columns:1fr auto;align-items:center;overflow:hidden;border:1px solid #b9c7d8;border-radius:8px;background:#fff}.input-row:focus-within{border-color:var(--color-primary);box-shadow:0 0 0 4px #005aab1f}.input-row input{width:100%;min-width:0;border:0;padding:16px;color:var(--color-text);font-size:1.12rem;outline:0}.input-row span{padding:0 16px;color:var(--color-muted);font-weight:800}.input-help{margin:0;color:var(--color-muted);font-size:.95rem;line-height:1.6}.error-message{margin:0;color:#b42318;font-weight:700;line-height:1.6}.results{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.result-box{min-height:112px;padding:16px;border:1px solid var(--color-line);border-radius:8px;background:#f8fbff}.result-box span{display:block;margin-bottom:10px;color:var(--color-muted);font-size:.92rem;font-weight:800;line-height:1.45}.result-box strong{display:block;color:var(--color-primary);font-size:clamp(1.3rem,3vw,1.85rem);line-height:1.18;letter-spacing:0;overflow-wrap:anywhere}.result-box--highlight{border-color:#0f9f8873;background:#effbf8}.result-box--highlight strong{color:#087b68}.summary-panel{display:flex;flex-direction:column;justify-content:center;gap:12px;padding:24px}.formula-line{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:12px;border-bottom:1px solid var(--color-line)}.formula-line span{color:var(--color-muted);font-weight:700}.formula-line strong{color:var(--color-primary);font-size:1.45rem}.summary-panel p{margin:6px 0 0;color:var(--color-muted);line-height:1.75}.ad-placeholder{display:grid;min-height:96px;margin-top:18px;place-items:center;border:1px dashed #95a7bd;border-radius:8px;color:var(--color-muted);background:#ffffffb8;font-weight:800}.content-section{padding:18px 0 54px}.article{padding:30px;border:1px solid var(--color-line);border-radius:8px;background:var(--color-white);box-shadow:var(--shadow)}.article p{color:#334155;line-height:1.85}.example-box{margin:24px 0;padding:18px;border-left:5px solid var(--color-accent);border-radius:8px;background:#f1fbf8}.example-box p,.example-box h3{margin-bottom:0}.ad-placeholder--article{margin:28px 0;background:#fbfcfe}.faq{display:grid;gap:14px;margin-top:10px}.faq h2{margin-bottom:2px}.faq-item{padding:16px 0;border-top:1px solid var(--color-line)}.faq-item p{margin-bottom:0}footer{padding:26px 0 34px;color:var(--color-muted);font-size:.95rem;line-height:1.7;text-align:center}@media(max-width:860px){.hero{padding-top:42px}.calculator-grid{grid-template-columns:1fr}}@media(max-width:640px){.hero__content,.calculator-section,.content-section,footer{width:min(100% - 28px,1120px)}.calculator-card,.summary-panel,.article{padding:18px}.results{grid-template-columns:1fr}.result-box{min-height:92px}.official-note{display:block}}