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*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:'Noto Sans Thai','Inter',system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}button,input,select{font:inherit}.tool-shell{width:min(1180px,calc(100% - 36px));margin:auto}.tool-nav{position:sticky;top:0;z-index:90;background:rgba(250,252,254,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.nav-row{height:76px;display:flex;align-items:center;gap:20px}.tool-brand{display:flex;align-items:center;gap:10px}.tool-brand img{width:43px;height:43px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:5px}.tool-brand b{display:block;font:800 18px Inter}.tool-brand b span{color:#087da5}.tool-brand small{display:block;font-size:9px;color:#73879b;font-weight:800;letter-spacing:.06em}.tool-nav nav{margin-left:auto;display:flex;gap:6px}.tool-nav nav a{padding:9px 11px;border-radius:11px;font-size:12px;font-weight:800;color:#42576b}.tool-nav nav a:hover{background:#eaf9fd;color:#087da5}.tool-menu-btn{display:none;margin-left:auto;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink)}.tool-kicker,.section-label{display:inline-flex;align-items:center;gap:8px;font:900 10px Inter,'Noto Sans Thai';letter-spacing:.12em;color:#67e8f9}.section-label{color:#087da5}
.unit-hero{position:relative;overflow:hidden;padding:66px 0 72px;background:radial-gradient(circle at 15% 20%,rgba(14,165,198,.26),transparent 31%),radial-gradient(circle at 84% 24%,rgba(37,99,235,.18),transparent 28%),linear-gradient(135deg,#051c31,#073a59 52%,#08496b);color:#fff}.unit-hero:after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(125,211,252,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(125,211,252,.05) 1px,transparent 1px);background-size:48px 48px;pointer-events:none}.unit-hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr .85fr;gap:60px;align-items:center}.unit-hero h1{font:900 clamp(43px,5vw,64px)/1.05 Inter,'Noto Sans Thai';letter-spacing:-.055em;margin:14px 0 18px}.unit-hero h1 em{font-style:normal;color:transparent;background:linear-gradient(95deg,#67e8f9,#bfdbfe);-webkit-background-clip:text;background-clip:text}.unit-hero p{max-width:680px;color:#bfd6e2;font-size:15px}.unit-pills{display:flex;gap:9px;flex-wrap:wrap;margin-top:23px}.unit-pills span{padding:7px 10px;border:1px solid rgba(255,255,255,.12);border-radius:999px;background:rgba(255,255,255,.06);font-size:10px;font-weight:800;color:#d8ecf4}.unit-pills i{color:#5ee6a8;margin-right:4px}.measure-visual{position:relative;min-height:330px;border:1px solid rgba(125,211,252,.16);border-radius:30px;background:linear-gradient(160deg,rgba(4,32,54,.85),rgba(6,47,75,.78));overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.23)}.measure-visual:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(125,211,252,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(125,211,252,.06) 1px,transparent 1px);background-size:34px 34px}.ruler{position:absolute;background:repeating-linear-gradient(90deg,#67e8f9 0 1px,transparent 1px 14px);border-top:1px solid rgba(103,232,249,.5);height:14px;opacity:.45}.r1{left:9%;right:9%;bottom:13%}.r2{left:9%;right:9%;top:13%;transform:rotate(180deg)}.measure-core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:205px;height:205px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#12688f,#0a4b70 52%,#07334e);border:1px solid rgba(125,211,252,.27);display:grid;place-items:center;text-align:center;box-shadow:0 0 55px rgba(34,211,238,.16),inset 0 0 30px rgba(125,211,252,.08)}.measure-core i{font-size:29px;color:#7dd3fc}.measure-core b{font:800 23px Inter;margin-top:-8px}.measure-core span{font:700 13px Inter;color:#c6eaf3;margin-top:-22px}.measure-core small{font:800 8px Inter;color:#78a8bc;letter-spacing:.13em;margin-top:-25px}.unit-chip{position:absolute;padding:7px 10px;border:1px solid rgba(125,211,252,.19);border-radius:999px;background:rgba(3,31,51,.9);color:#bdebf6;font:800 9px Inter;box-shadow:0 8px 24px rgba(0,0,0,.16)}.u1{left:8%;top:22%}.u2{right:10%;top:27%}.u3{left:12%;bottom:25%}.u4{right:11%;bottom:20%}
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@media(max-width:680px){.tool-shell{width:min(100% - 26px,1180px)}.unit-hero{padding:52px 0 64px}.unit-hero h1{font-size:38px}.measure-visual{min-height:280px}.measure-core{width:165px;height:165px}.calc-switch{grid-template-columns:1fr;margin-top:-20px}.calculator-view{padding-top:60px}.section-head{display:block}.section-head .soft-btn,.geo-unit{margin-top:12px}.category-list{grid-template-columns:1fr 1fr}.conversion-zone{grid-template-columns:1fr}.swap-circle{margin:auto;transform:rotate(90deg)}.swap-circle:hover{transform:rotate(270deg)}.quick-values{grid-template-columns:repeat(2,1fr)}.formula-strip{align-items:flex-start;flex-wrap:wrap}.formula-strip button{margin-left:50px}.shape-tabs{overflow-x:auto;flex-wrap:nowrap;padding-bottom:5px}.shape-tab{white-space:nowrap}.shape-inputs{grid-template-columns:1fr}.result-grid{grid-template-columns:1fr}.blueprint-canvas{min-height:330px}.reference-grid{grid-template-columns:1fr}.tool-footer>.tool-shell{display:block}.tool-footer small{display:block;margin-top:6px}.coming-main{padding:55px 0}.coming-card{padding:20px;gap:30px}.coming-copy h1{font-size:39px}.coming-status{grid-template-columns:42px 1fr}.coming-status span{grid-column:2}.future-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}.load-arrow{animation:none}.view-btn,.swap-circle{transition:none}}