:root{--neo:#205ed9;--navy:#102047;--sky:#3fb4e4;--paper:#f4f8ff;--line:#dce7f7;--muted:#61708f;--gold:#f8bd23;--white:#fff;--radius:22px;--shadow:0 18px 45px rgba(18,52,124,.12)}
@font-face{font-family:Kanit;src:url('fonts/Kanit-Regular.ttf')}@font-face{font-family:Kanit;src:url('fonts/Kanit-SemiBold.ttf');font-weight:600}@font-face{font-family:Kanit;src:url('fonts/Kanit-Bold.ttf');font-weight:700}@font-face{font-family:Kanit;src:url('fonts/Kanit-ExtraBold.ttf');font-weight:800}
#result-note{background:#fff0f0;border:2px solid #e32828;border-left:7px solid #e32828;color:#a31212;font-weight:800;box-shadow:0 6px 18px rgba(227,40,40,.18)}
select option:disabled{color:#9aa5b8}input:disabled,select:disabled{background:#eef2f7;color:#8792a7;cursor:not-allowed}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--navy);font-family:Kanit,Arial,sans-serif;line-height:1.55}button,input,select{font:inherit}button{cursor:pointer}a{color:inherit}.container{width:min(1180px,calc(100% - 32px));margin:auto}.site-header{background:#fff;border-bottom:1px solid var(--line)}.nav{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand img{display:block;width:220px;max-width:50vw}.nav-links{display:flex;gap:8px;align-items:center}.nav-link,.button{border:1px solid var(--line);background:#fff;color:var(--neo);border-radius:999px;padding:8px 15px;text-decoration:none;font-weight:700}.nav-link.active,.button.primary{background:var(--neo);border-color:var(--neo);color:#fff}.hero{overflow:hidden;color:#fff;background:linear-gradient(118deg,#12347c,#205ed9 63%,#3fb4e4);padding:54px 0 66px;position:relative}.hero:after{content:"";position:absolute;width:300px;height:300px;right:-90px;top:-150px;background:rgba(255,255,255,.12);border-radius:38px;transform:rotate(28deg)}.hero .container{position:relative;z-index:1}.kicker{margin:0 0 9px;text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;color:#d8efff}.hero h1{font-size:clamp(2.25rem,5vw,4.3rem);line-height:1.02;margin:0 0 14px;letter-spacing:-.04em}.hero p:last-child{max-width:720px;margin:0;color:#e1efff;font-size:1.05rem}.page{padding:36px 0 74px}.tool-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(290px,.7fr);gap:24px;align-items:start}.card{background:var(--white);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--radius);padding:28px}.card h2,.card h3{margin:0 0 4px;line-height:1.2}.sub{color:var(--muted);font-size:.94rem;margin:0 0 20px}.section{padding:20px 0;border-top:1px solid var(--line)}.section:first-of-type{border-top:0;padding-top:0}.section-title{font-size:1.04rem;font-weight:800;margin:0 0 14px}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.fields.three{grid-template-columns:repeat(3,minmax(0,1fr))}label{display:block;font-weight:600;font-size:.9rem;color:#304267}input,select{width:100%;margin-top:5px;border:1px solid #cbdaf0;border-radius:11px;padding:9px 11px;background:#fff;color:var(--navy);outline:none}input:focus,select:focus{border-color:var(--neo);box-shadow:0 0 0 3px rgba(32,94,217,.13)}.toggle{display:flex;gap:8px;flex-wrap:wrap}.toggle button{border:1px solid #cbdaf0;color:#476188;background:#fff;border-radius:999px;padding:7px 13px;font-weight:700}.toggle button.is-active{color:#fff;background:var(--neo);border-color:var(--neo)}.results{position:sticky;top:18px;background:linear-gradient(145deg,#102047,#205ed9);color:#fff}.results .sub{color:#d7eaff}.metric{padding:14px 0;border-top:1px solid rgba(255,255,255,.2)}.metric:first-of-type{border:0}.metric small{display:block;color:#cfe6ff}.metric strong{font-size:clamp(1.45rem,3vw,2.1rem);letter-spacing:-.03em}.metric span{font-size:.95rem}.notice{background:#fff8df;border:1px solid #f5d87f;border-radius:12px;padding:12px 14px;color:#654b08;font-size:.9rem}.info{background:#eaf6fd;border-left:4px solid var(--sky);border-radius:9px;padding:11px 13px;color:#254a70;font-size:.9rem}.layer{border:1px solid var(--line);border-radius:15px;margin-top:12px;padding:15px;background:#fbfdff}.layer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:11px;font-weight:800}.remove{border:0;background:none;color:#c94040;font-weight:700}.add-layer{width:100%;margin-top:15px;padding:10px;border:1px dashed #93b3e7;background:#f4f8ff;color:var(--neo);font-weight:800;border-radius:12px}.spec-table{width:100%;border-collapse:collapse;font-size:.88rem}.spec-table th,.spec-table td{text-align:left;padding:9px;border-bottom:1px solid var(--line);vertical-align:top}.spec-table th{color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.06em}.footer{color:#687897;text-align:center;padding:26px}.hidden{display:none!important}@media(max-width:820px){.tool-grid{grid-template-columns:1fr}.results{position:static}.fields.three{grid-template-columns:1fr 1fr}.nav{min-height:66px}.brand img{width:170px}.nav-link{padding:7px 10px;font-size:.84rem}.card{padding:21px}.hero{padding:40px 0 46px}}@media(max-width:520px){.fields,.fields.three{grid-template-columns:1fr}.nav-link:not(.active){display:none}.page{padding-top:20px}.hero h1{font-size:2.35rem}}