:root { color-scheme: light; font-family: 'Malgun Gothic','Apple SD Gothic Neo',sans-serif; color: #263b35; background: #f2f2e9; font-size: 17px; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
.top { min-height: 72px; padding: 0 max(24px,5vw); display: flex; align-items: center; justify-content: space-between; gap: 1rem; background: #fffefa; border-bottom: 1px solid #d4ded2; font-weight: 700; }
.top a { min-height: 48px; display: flex; align-items: center; color: #25584a; }
main { width: min(1120px,100%); margin: auto; padding: 48px 26px 70px; }
h1,h2,h3,p { margin-top: 0; }
h1 { font-size: clamp(2rem,4vw,3rem); line-height: 1.2; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.1rem; }
p { line-height: 1.65; }
.eyebrow { color: #794823; font-weight: 700; }
.lead { font-size: 1.2rem; font-weight: 700; line-height: 1.6; }
.intro { min-height: 510px; display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.intro-art { width: 100%; max-width: 450px; justify-self: center; }
fieldset { border: 0; padding: 0; margin: 1.5rem 0; }
legend { font-weight: 700; margin-bottom: .6rem; }
label { display: block; margin: .5rem 0; line-height: 1.5; }
input[type='radio'] { width: 20px; height: 20px; vertical-align: middle; accent-color: #315b50; }
button,summary { font: inherit; }
button { min-height: 48px; padding: .7rem 1rem; border: 2px solid #496c60; border-radius: .55rem; color: #21483e; background: #fffefa; font-weight: 700; cursor: pointer; }
button.primary { color: #fff; background: #315a50; border-color: #315a50; }
button:disabled { opacity: .55; cursor: default; }
button:focus-visible,summary:focus-visible,input:focus-visible,a:focus-visible { outline: 3px solid #9a4c23; outline-offset: 3px; }
.heading { display: flex; align-items: start; justify-content: space-between; gap: 1rem; }
details { margin-bottom: 1rem; padding: .7rem 1rem; background: #e4ece2; border-radius: .7rem; }
summary { min-height: 44px; padding: .55rem 0; font-weight: 700; cursor: pointer; }
.panel,.component { padding: 1.4rem; border: 1px solid #d0dccd; background: #fffefa; border-radius: 1rem; }
.diagram { max-width: 430px; background: #edf3e9; border-radius: .6rem; }
.diagram svg { width: 100%; display: block; }
.wire { stroke: #77988a; stroke-width: 8; stroke-linecap: round; }
.module,.replaced { fill: #fffefa; stroke: #527b6c; stroke-width: 4; }
.replaced { fill: #f6e3c8; stroke: #9a5d31; stroke-width: 5; }
.diagram text { text-anchor: middle; font-size: 20px; font-weight: 800; fill: #263b35; }
.source { fill: #547c68; stroke: #355c4b; stroke-width: 3; }
.endpoint { fill: #fffefa; stroke: #527b6c; stroke-width: 3; }
.spares { font-weight: 800; margin-top: .8rem; }
.components { display: grid; grid-template-columns: repeat(auto-fit,minmax(min(100%,250px),1fr)); gap: .8rem; }
.reading { min-height: 3.5rem; line-height: 1.6; }
.actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.status { margin: 1rem 0; padding: .8rem 1rem; background: #e2ede1; border-radius: .6rem; min-height: 3rem; }
.result { max-width: 720px; margin: 2rem auto; }
.result button { margin: .3rem; }
dialog { width: min(90vw, 32rem); border: 2px solid #526f60; border-radius: .8rem; padding: 1.25rem; color: #1e3529; background: #fff; }
dialog::backdrop { background: rgb(20 35 27 / 55%); }
footer { border-top: 1px solid #d0dccd; padding: 1.5rem max(24px,5vw); color: #455b50; font-size: .9rem; }
@media (max-width: 760px) { main { padding: 32px 16px 48px; } .intro { grid-template-columns: 1fr; gap: 1rem; } .intro-art { max-width: 320px; } .heading { flex-wrap: wrap; } .panel,.component { padding: 1rem; } }
@media (prefers-reduced-motion: reduce) { *,*::before,*::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }

/* 판 선택 화면 목록 링크 */
#hub-link, #hub { color: #174f74; display: inline-flex; align-items: center; min-height: 44px; padding: 0 4px; font-weight: 700; }
#hub-link[hidden], #hub[hidden] { display: none; }