@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial}}}@layer theme{:root,:host{--font-sans:var(--font-sans);--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--text-lg:1.125rem;--text-lg--line-height:calc(1.75 / 1.125);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.absolute{position:absolute}.fixed{position:fixed}.static{position:static}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.mt-3{margin-top:calc(var(--spacing) * 3)}.mt-5{margin-top:calc(var(--spacing) * 5)}.mb-3{margin-bottom:calc(var(--spacing) * 3)}.mb-5{margin-bottom:calc(var(--spacing) * 5)}.block{display:block}.grid{display:grid}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.justify-center{justify-content:center}.rounded{border-radius:.25rem}.text-lg{font-size:var(--text-lg);line-height:var(--tw-leading,var(--text-lg--line-height))}}:root{--ink:#18313e;--muted:#617580;--teal:#087e72;--line:#dce5e8;--paper:#f6f8fa;--navy:#153746;--font-sans:Arial,"Noto Sans KR","Malgun Gothic",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;margin:0;font-family:Arial,Noto Sans KR,Malgun Gothic,sans-serif;font-size:16px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}:focus-visible{outline-offset:4px;outline:3px solid #128fbb}h1,h2,h3,p{margin:0}h1,h2,h3{letter-spacing:-.035em;line-height:1.4}h1{font-size:2.25rem;font-weight:750}h2{font-size:1.55rem;font-weight:750}h3{font-size:1.07rem;font-weight:700}svg{flex-shrink:0}.container{max-width:1232px;margin:auto;padding:0 32px}.site-header{border-bottom:1px solid var(--line);background:#fff}.header-inner{align-items:center;gap:38px;max-width:1376px;min-height:82px;margin:auto;padding:16px 32px;display:flex}.brand{letter-spacing:-.05em;white-space:nowrap;align-items:center;gap:11px;font-size:1.17rem;font-weight:750;display:flex}.brand-light{margin-left:3px;font-weight:400}.brand-mark{color:#fff;background:var(--navy);border-radius:7px;place-items:center;width:37px;height:37px;display:grid}.main-nav{flex:1;align-items:center;gap:26px;display:flex}.main-nav a{white-space:nowrap;padding:9px 0;font-size:.875rem;font-weight:600}.main-nav a:hover{color:var(--teal)}.header-search{width:205px}.search-box{min-height:58px;color:var(--muted);background:#fff;border:1px solid #cbd9dd;border-radius:7px;align-items:center;gap:13px;padding:0 18px;display:flex;position:relative;box-shadow:0 4px 12px #1d435306}.search-box:focus-within{border-color:var(--teal);box-shadow:0 0 0 3px #0c89701c}.search-box input{width:100%;min-width:0;color:var(--ink);background:0 0;border:0;outline:0;padding:15px 0;font-size:.9375rem}.search-box input::placeholder{color:#6f818a}.search-box.compact{min-height:42px;box-shadow:none;background:#f7f9fa;padding:0 12px}.search-box.compact input{padding:8px 0;font-size:.875rem}.search-box.compact svg{width:17px}.search-hint{border:1px solid var(--line);white-space:nowrap;border-radius:4px;padding:2px 7px;font-size:.75rem}.search-results{z-index:20;border:1px solid var(--line);text-align:left;background:#fff;border-radius:8px;max-height:380px;position:absolute;top:calc(100% + 8px);left:0;right:0;overflow:auto;box-shadow:0 16px 35px #15374624}.compact .search-results{width:350px;left:auto}.search-results ul{margin:0;padding:0;list-style:none}.search-count{background:var(--paper);padding:12px 16px;font-size:.875rem}.search-results a{color:var(--ink);border-top:1px solid #edf1f3;flex-direction:column;padding:12px 16px;font-size:.9375rem;display:flex}.search-results a:hover{background:#eff8f6}.search-results small{color:var(--muted);font-size:.75rem}.hero{grid-template-columns:1fr 350px;align-items:center;gap:72px;padding:58px 0 42px;display:grid}.eyebrow{letter-spacing:.1em;color:var(--teal);font-size:.75rem;font-weight:700;line-height:1.8;display:block}.hero .eyebrow{align-items:center;gap:9px;margin-bottom:14px;display:flex}.eyebrow-line{background:var(--teal);width:25px;height:2px}.hero h1{letter-spacing:.01em;font-size:1.05rem;font-weight:600}.hero h1>span{letter-spacing:-.055em;margin-top:8px;font-size:2.8rem;font-weight:750;line-height:1.32;display:block}.hero-copy>p{color:var(--muted);margin:18px 0 25px;font-size:1rem;line-height:1.8}.hero-meta{color:#586f78;flex-wrap:wrap;gap:18px;margin-top:16px;font-size:.75rem;display:flex}.hero-meta span{align-items:center;gap:4px;display:flex}.hero-meta svg{color:var(--teal)}.mobile-break{display:none}.hero-spec{background-color:#f2f8f7;background-image:linear-gradient(#d7e7e74d 1px,#0000 1px),linear-gradient(90deg,#d7e7e74d 1px,#0000 1px);background-size:20px 20px;border:1px solid #c9e0dd;border-radius:9px;padding:18px 22px 0;transform:rotate(-1.5deg)}.spec-top{letter-spacing:.08em;color:#4e7b78;justify-content:space-between;font-family:monospace;font-size:.69rem;display:flex}.hero-spec>svg{width:100%;height:210px}.spec-formula{text-align:center;color:#235b58;padding:9px 0 20px;font:.875rem monospace}.hero-spec>a{color:#1a635d;border-top:1px solid #c9e0dd;justify-content:space-between;padding:13px 0;font-size:.8125rem;font-weight:600;display:flex}.category-strip{border:1px solid var(--line);background:#fff;border-radius:8px;grid-template-columns:repeat(5,1fr);display:grid}.category-card{border-right:1px solid var(--line);align-items:center;gap:11px;padding:21px 15px;display:flex}.category-card:last-child{border:0}.category-card:hover{background:#f1f8f6}.icon-tile{color:#178073;background:#eaf4f2;border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;display:inline-flex}.category-marine .icon-tile{color:#3c73aa;background:#ecf3fb}.category-cad .icon-tile{color:#7262a1;background:#f1effa}.category-unit-converter .icon-tile{color:#946321;background:#fbf2e6}.category-excel .icon-tile{color:#3b7953;background:#ebf5ed}.category-card h3{letter-spacing:-.02em;white-space:nowrap;font-size:.8125rem}.category-card p{color:var(--muted);margin-top:2px;font-size:.75rem}.category-count{color:#74858d;align-self:flex-start;margin-left:auto;font:.6875rem monospace}.section{margin:52px 0}.section-title{justify-content:space-between;align-items:flex-end;gap:18px;margin-bottom:24px;display:flex}.section-title h2{margin-top:6px}.section-title p{color:var(--muted);margin-top:7px;font-size:.9375rem}.section-count{letter-spacing:.07em;color:#647b84;white-space:nowrap;padding-bottom:4px;font:.6875rem monospace}.tool-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.tool-card{border:1px solid var(--line);background:#fff;border-radius:8px;flex-direction:column;padding:23px;transition:border-color .15s,box-shadow .15s;display:flex}.tool-card:hover{border-color:#80aca7;box-shadow:0 5px 15px #16374708}.tool-card-top{justify-content:space-between;align-items:center;margin-bottom:17px;display:flex}.tool-category{letter-spacing:.04em;color:#667b87;border:1px solid #e3e9ec;border-radius:4px;padding:2px 7px;font-size:.6875rem}.english-title{color:#68808a;margin-top:4px;font-size:.75rem}.tool-description{color:#60737d;flex:1;margin-top:12px;font-size:.875rem;line-height:1.7}.open-tool{color:#217064;border-top:1px solid #edf1f3;justify-content:space-between;margin-top:20px;padding-top:15px;font-size:.8125rem;font-weight:600;display:flex}.discipline-list{border:1px solid var(--line);background:#fff;border-radius:8px}.discipline{border-bottom:1px solid var(--line);grid-template-columns:1fr 1fr;gap:40px;padding:27px;display:grid}.discipline:last-child{border:0}.discipline-heading{gap:16px;display:flex}.discipline-heading h3{font-size:1rem}.discipline-heading p{color:var(--muted);margin-top:6px;font-size:.875rem}.discipline-links{grid-template-columns:1fr 1fr;align-content:start;gap:6px 20px;font-size:.8125rem;display:grid}.discipline-links a{text-underline-offset:4px;padding:5px 0;-webkit-text-decoration:underline #bed0d2;text-decoration:underline #bed0d2}.discipline-links a:hover{color:var(--teal)}.guide-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;display:grid}.guide-card{border-top:2px solid #b6ccce;padding:22px 0;position:relative}.guide-card .eyebrow{margin:12px 0;font-size:.6875rem}.guide-index{color:#c2d0d6;font:2.5rem monospace}.guide-card h3{margin-bottom:10px;font-size:1.1rem}.guide-card p{color:var(--muted);font-size:.875rem}.text-link{color:var(--teal);text-underline-offset:5px;font-size:.875rem;text-decoration:underline}.about-band{background:#eaf0f2;border-radius:8px;align-items:center;gap:25px;margin:20px 0 58px;padding:32px;display:flex}.about-band>svg{color:#367778}.about-band>div{flex:1}.about-band h2{margin-bottom:9px;font-size:1.15rem}.about-band p{color:#596f78;max-width:700px;font-size:.875rem}.about-band .english-subtitle{margin-top:8px;font-size:.75rem}.site-footer{background:var(--navy);color:#e9f1f4;padding:44px 0 0}.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;display:grid}.footer-brand{letter-spacing:-.03em;font-size:1.25rem;font-weight:700}.footer-brand span{vertical-align:top;margin-left:4px;font-size:.75rem}.footer-grid p{color:#b6c8cf;margin:15px 0;font-size:.875rem;line-height:1.9}.footer-small{color:#acc1c9;font-size:.75rem}.footer-grid h2{letter-spacing:0;margin-bottom:15px;font-size:.875rem}.footer-grid>div:not(:first-child)>a{color:#bdcdd3;margin:8px 0;padding:3px 0;font-size:.8125rem;display:block}.footer-grid a:hover{color:#fff;text-decoration:underline}.footer-bottom{color:#b3c5cd;border-top:1px solid #34515e;justify-content:space-between;gap:20px;margin-top:32px;padding-top:20px;padding-bottom:20px;font-size:.75rem;display:flex}.page-body{padding-top:25px;padding-bottom:70px}.breadcrumb ol{color:var(--muted);flex-wrap:wrap;gap:9px;margin:0 0 30px;padding:0;font-size:.8125rem;list-style:none;display:flex}.breadcrumb li+li:before{content:"/";color:#9aacb4;margin-right:9px}.breadcrumb a:hover{text-decoration:underline}.category-intro{max-width:790px;margin:25px 0 35px}.category-intro>.icon-tile{width:60px;height:60px;margin-bottom:20px}.category-intro h1{margin:7px 0 13px}.category-intro p{color:var(--muted)}.calculator-heading{margin-bottom:27px}.calculator-heading h1{margin:7px 0 9px;font-size:2rem}.calculator-heading p{color:var(--muted);max-width:850px}.calculator-workspace{grid-template-columns:1fr 1fr;align-items:start;gap:24px;display:grid}.calculator-card{border:1px solid var(--line);background:#fff;border-radius:9px;padding:28px}.panel-heading{justify-content:space-between;align-items:center;gap:16px;margin-bottom:23px;display:flex}.panel-heading h2{font-size:1.125rem}.panel-heading>span{color:var(--teal);background:#edf7f3;border-radius:4px;padding:3px 8px;font-size:.75rem}.input-grid{grid-template-columns:1fr 1fr;gap:20px 18px;display:grid}.input-field{min-width:0}.input-field label{margin-bottom:7px;font-size:.8125rem;font-weight:600;display:block}.optional{color:var(--muted);margin-left:6px;font-size:.75rem;font-weight:400}.input-field input,.input-field select,.precision-select select{width:100%;min-height:46px;color:var(--ink);background:#fff;border:1px solid #cbd8de;border-radius:5px;padding:10px 12px}.input-field input{font-variant-numeric:tabular-nums;min-width:0}.input-field input[aria-invalid=true]{border-color:#b64138}.input-with-unit{display:flex}.input-with-unit input{border-radius:5px 0 0 5px;flex:1;width:1%}.input-with-unit select{background:#f5f8fa;border-left:0;border-radius:0 5px 5px 0;width:88px;padding:10px 5px 10px 8px;font-size:.8125rem}.input-with-unit select.long-unit{width:105px}.field-hint{color:var(--muted);margin-top:5px;font-size:.75rem}.wide-field{grid-column:1/-1}.material-row{border-top:1px solid var(--line);grid-template-columns:1fr 1fr;gap:18px;margin-top:22px;padding-top:22px;display:grid}.scale-presets{flex-wrap:wrap;gap:6px;margin:18px 0 0;display:flex}.scale-presets button{color:#42606b;background:#f7fafb;border:1px solid #cfdee0;border-radius:4px;min-height:36px;padding:4px 8px;font-size:.75rem}.scale-presets button[aria-pressed=true]{background:var(--teal);color:#fff;border-color:var(--teal)}.actions{flex-wrap:wrap;align-items:center;gap:9px;margin-top:24px;display:flex}.button{border:1px solid #0000;border-radius:5px;justify-content:center;align-items:center;gap:7px;min-height:44px;padding:9px 14px;font-size:.8125rem;font-weight:600;display:inline-flex}.button.secondary{color:#425e6a;background:#fff;border-color:#cfdbdf}.button.secondary:hover{background:#f0f6f6}.button.primary{background:var(--teal);color:#fff}.action-status{color:var(--teal);font-size:.75rem}.action-status:empty{display:none}.precision-select{color:var(--muted);align-items:center;gap:9px;font-size:.75rem;display:flex}.precision-select select{width:60px;min-height:38px;padding:5px 9px;font-size:.875rem}.result-card{background:#edf7f4;border:1px solid #cce4db;border-radius:7px;margin-bottom:17px;padding:23px}.result-card>p{color:#376c63;font-size:.875rem}.result-number{color:#10695b;font-variant-numeric:tabular-nums;letter-spacing:-.04em;overflow-wrap:anywhere;font-size:2.65rem;font-weight:700;line-height:1.4}.result-number>span{letter-spacing:0;margin-left:9px;font-size:1rem;font-weight:500}.result-table{border-collapse:collapse;width:100%;font-size:.8125rem}.result-table th,.result-table td{border-bottom:1px solid #e9eff1;padding:11px 0}.result-table th{text-align:left;color:#5d737d;padding-right:10px;font-weight:400}.result-table td{text-align:right;font-variant-numeric:tabular-nums;overflow-wrap:anywhere;max-width:240px;font-weight:600}.result-unit{color:#72858e;font-size:.75rem;font-weight:400}.result-placeholder{text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:7px;padding:45px 10px;font-size:.9375rem}.error-message{color:#943b32;background:#fff3f1;border:1px solid #ecc2bd;border-radius:5px;margin-top:20px;padding:14px;font-size:.875rem}.error-message p{margin-top:4px}.calculator-content{grid-template-columns:minmax(0,800px) 1fr;gap:45px;margin-top:40px;display:grid}.content-section{margin:0 0 35px}.content-section h2{margin-bottom:16px;font-size:1.25rem}.content-section h2 span{color:var(--muted);letter-spacing:0;margin-left:8px;font-size:.75rem;font-weight:400}.content-section p,.content-section li{color:#536c78;font-size:.9375rem;line-height:1.95}.content-section ol,.content-section ul{margin:0;padding-left:24px}.content-section li{margin:7px 0}.formula-box{white-space:pre-wrap;word-break:break-word;color:#244e5b;background:#eaf0f3;border-left:3px solid #418891;border-radius:0 6px 6px 0;margin:0;padding:23px;font:.9375rem/1.9 Consolas,monospace}.example-box{border:1px solid var(--line);color:#536c78;background:#fff;border-radius:6px;padding:22px;font-size:.9375rem;line-height:1.9}.engineering-note{background:#fff9ee;border:1px solid #eee2c9;border-radius:6px;padding:20px}.faq{border-top:1px solid var(--line)}.faq details{border-bottom:1px solid var(--line);padding:0 3px}.faq summary{cursor:pointer;padding:17px 0;font-size:.9375rem;font-weight:600}.faq details p{padding:0 0 20px}.calculator-aside{padding-top:5px}.aside-box{border:1px solid var(--line);background:#fff;border-radius:6px;margin-bottom:20px;padding:22px}.aside-box h2{margin-bottom:14px;font-size:1rem}.aside-box a{color:#4a6f79;border-top:1px solid #e9eff1;padding:9px 0;font-size:.8125rem;display:block}.aside-box p{color:var(--muted);font-size:.8125rem}.ad-placeholder{color:#73838c;background:#edf1f3;border:1px dashed #cbd4d9;place-items:center;min-height:120px;margin:30px 0;font-size:.75rem;display:grid}.trim-diagram{background:#f2f7fa;border-radius:6px;width:100%;margin:12px 0}.formula-suggestion{margin:16px 0}.formula-suggestion h3{margin-bottom:6px;font-size:.8125rem}.formula-suggestion code{border:1px solid var(--line);overflow-wrap:anywhere;white-space:pre-wrap;background:#f1f6f7;border-radius:5px;padding:13px;font:.875rem/1.75 Consolas,monospace;display:block}.formula-suggestion .button{margin-top:7px}.excel-parts{flex-wrap:wrap;gap:7px;margin:15px 0;display:flex}.excel-parts span{overflow-wrap:anywhere;background:#eef5f1;border:1px solid #d3e5da;border-radius:4px;padding:5px 10px}.prose-page{max-width:840px;margin:0 auto}.prose-page>header{margin:15px 0 30px}.prose-page h1{margin:8px 0 15px}.prose-page h2{margin:30px 0 12px;font-size:1.3rem}.prose-page p,.prose-page li{color:#526a76;margin-bottom:16px;line-height:1.95}.prose-page a:not(.button){color:var(--teal);text-underline-offset:4px;text-decoration:underline}.empty-page{text-align:center;padding-top:90px;padding-bottom:110px}.empty-page p{margin:20px auto}.skip-link{background:var(--navy);color:#fff;z-index:100;padding:12px 20px;position:fixed;top:-100px;left:15px}.skip-link:focus{top:10px}@media (max-width:1150px){.header-inner{gap:25px}.main-nav{gap:18px}.header-search{display:none}.hero{grid-template-columns:1fr 310px;gap:35px}.category-card{gap:7px;padding:18px 10px}.category-count{display:none}.category-card .icon-tile{width:32px;height:35px}}@media (max-width:850px){.header-inner{flex-wrap:wrap;gap:12px;padding:16px 24px 8px}.brand{width:100%}.main-nav{gap:24px;overflow:auto}.main-nav a{min-height:44px}.container{padding-left:24px;padding-right:24px}.hero{grid-template-columns:1fr 240px;gap:20px;padding-top:35px}.hero h1>span{font-size:2.2rem}.hero-spec{padding:15px 14px 0}.hero-spec>svg{height:170px}.spec-formula{font-size:.67rem}.spec-top{font-size:.59rem}.category-strip{grid-template-columns:repeat(3,1fr);overflow:hidden}.category-card{border-bottom:1px solid var(--line);padding:16px}.category-card:last-child{border-right:1px solid var(--line)}.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section-count{display:none}.discipline{grid-template-columns:1fr;gap:17px}.discipline-links{padding-left:56px}.calculator-card{padding:21px}.calculator-workspace{gap:16px}.input-grid,.calculator-content{grid-template-columns:1fr}.calculator-aside{display:none}.calculator-heading h1{font-size:1.7rem}.guide-grid{gap:22px}.about-band{padding:25px}.about-band>svg{display:none}.footer-grid{grid-template-columns:2fr 1fr 1fr;gap:20px}.footer-grid>div:first-child{grid-column:1/-1}}@media (max-width:600px){.container,.header-inner{padding-left:18px;padding-right:18px}.main-nav{gap:23px}.main-nav a{font-size:.8125rem}.hero{padding:31px 0 26px;display:block}.hero h1>span{font-size:2.5rem}.hero-spec{display:none}.hero-copy>p{font-size:.9375rem}.hero-meta{gap:12px;font-size:.6875rem}.hero .eyebrow{font-size:.6875rem}.search-hint{display:none}.category-strip{grid-template-columns:1fr 1fr}.category-card{border-bottom:1px solid var(--line);padding:15px}.category-card h3{font-size:.875rem}.category-card:last-child{grid-column:1/-1}.category-count{font-size:.8125rem;display:block}.tool-grid{grid-template-columns:1fr;gap:13px}.tool-card{padding:21px}.tool-card-top{margin-bottom:12px}.section{margin:37px 0}.section-title h2{font-size:1.4rem}.section-title p{font-size:.875rem}.discipline{padding:20px}.discipline-links{gap:9px 16px;padding-left:0}.discipline-links a{padding:9px 0}.guide-grid{grid-template-columns:1fr;gap:0}.guide-card{padding:16px 0 24px}.guide-index{float:right;font-size:2.2rem}.guide-card h3{max-width:88%}.about-band{margin-bottom:38px;padding:24px;display:block}.about-band .button{margin-top:19px}.footer-grid{grid-template-columns:1fr 1fr;gap:24px}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid>div:not(:first-child)>a{margin:0;padding:9px 0}.footer-bottom{flex-direction:column;gap:8px}h1{font-size:1.85rem}.calculator-heading h1{overflow-wrap:anywhere;font-size:1.6rem}.calculator-workspace{grid-template-columns:1fr}.input-grid{grid-template-columns:1fr 1fr;gap:17px 12px}.input-field label{font-size:.75rem}.input-with-unit{display:block}.input-with-unit input{border-radius:5px 5px 0 0;width:100%}.input-with-unit select,.input-with-unit select.long-unit{border-top:0;border-left:1px solid #cbd8de;border-radius:0 0 5px 5px;width:100%;min-height:44px}.result-number{font-size:2.3rem}.panel-heading{gap:8px}.calculator-content{margin-top:30px}.breadcrumb ol{margin-bottom:22px;font-size:.75rem}.scale-presets button{min-width:46px;min-height:44px}.content-section h2 span{margin-top:3px;margin-left:0;display:block}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media (max-width:1150px){.header-inner{flex-wrap:wrap}.header-search{width:100%;display:block}.compact .search-results{width:100%}}@media (max-width:600px){.input-field label{font-size:.8125rem}.main-nav{flex-basis:100%}}.language-switcher{flex-shrink:0;align-items:center;gap:2px;display:flex}.language-switcher a{white-space:nowrap;border-radius:6px;align-items:center;min-height:44px;padding:10px 8px;font-size:12px;display:flex}.language-switcher a[aria-current=page]{color:#146d68;background:#e5f2ef;font-weight:700}html[lang=ja]{font-family:Arial,Noto Sans JP,Yu Gothic,Meiryo,sans-serif}html[lang=en] .hero h1 span{font-size:clamp(27px,3.2vw,44px)}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}