.theory-page{color:#17232f;background:#f3f5f7;min-height:100vh;font-family:IBM Plex Sans,Noto Sans KR Variable,sans-serif}.theory-header{border-bottom:1px solid #c4d1d9;justify-content:space-between;align-items:center;gap:20px;height:72px;padding:0 max(4vw,50vw - 700px);display:flex}.theory-logo{letter-spacing:-.06em;color:#174a8b;font:700 20px IBM Plex Mono,monospace;text-decoration:none}.theory-logo span{letter-spacing:.02em;color:#8296a4;font-size:12px}.theory-header nav{align-items:center;gap:28px;display:flex}.theory-header nav a,.theory-header nav button{color:#30485a;font:600 12px IBM Plex Sans,Noto Sans KR Variable,sans-serif;text-decoration:none}.theory-header nav button{cursor:pointer;background:0 0;border:0;align-items:center;gap:6px;display:flex}.theory-header nav a:hover,.theory-header nav button:hover{color:#174a8b}.theory-hero{background:#e9eef2;border-bottom:1px solid #bed0dc;padding:88px max(6vw,50vw - 590px) 80px;position:relative;overflow:hidden}.theory-hero:after{content:"∠";color:#d2e0e8;pointer-events:none;font:500 420px IBM Plex Mono,monospace;position:absolute;top:-110px;right:5%}.theory-hero>*{z-index:1;position:relative}.theory-kicker,.theory-unit,.theory-section-index{letter-spacing:.12em;color:#17618e;font:600 11px IBM Plex Mono,monospace}.theory-hero h1{letter-spacing:-.065em;max-width:780px;margin:22px 0;font-size:clamp(45px,6vw,78px);line-height:1.04}.theory-hero p{color:#4d6576;max-width:680px;font-size:19px;line-height:1.62}.theory-hero-actions{flex-wrap:wrap;gap:12px;margin-top:34px;display:flex}.theory-hero-actions a,.theory-lab-link{color:#fff;background:#174a8b;align-items:center;gap:11px;padding:14px 20px;font-size:13px;font-weight:700;text-decoration:none;display:inline-flex}.theory-hero-actions a+a{color:#174a8b;background:0 0;border:1px solid #93afc1}.theory-index{max-width:1180px;margin:auto;padding:68px 24px 110px}.theory-index-intro{justify-content:space-between;align-items:start;gap:35px;margin-bottom:32px;display:flex}.theory-index-intro p{color:#5d7381;max-width:650px;margin:0;font-size:15px;line-height:1.7}.theory-chapter-list{border-top:1px solid #bbccd7}.theory-chapter-card{color:#17232f;border-bottom:1px solid #bbccd7;grid-template-columns:70px 1fr 24px;align-items:center;gap:26px;padding:26px 12px;text-decoration:none;transition:background .2s,padding .2s;display:grid}.theory-chapter-card:hover{background:#e7eff4;padding-left:23px}.theory-number{color:#9fb8c8;font:500 28px IBM Plex Mono,monospace}.theory-chapter-card h2{letter-spacing:-.035em;margin:6px 0;font-size:24px}.theory-chapter-card p{color:#69808d;margin:0;font-size:14px;line-height:1.5}.theory-chapter-card>svg{color:#174a8b}.theory-source{color:#637987;margin-top:30px;font-size:12px;line-height:1.7}.theory-source a{color:#174a8b}.theory-article-shell{grid-template-columns:285px minmax(0,1fr);gap:64px;max-width:1400px;margin:auto;padding:52px 4vw 100px;display:grid}.theory-sidebar{border-right:1px solid #c5d2db;align-self:start;max-height:calc(100vh - 40px);padding-right:30px;position:sticky;top:20px;overflow-y:auto}.theory-sidebar>a{color:#607787;gap:11px;padding:10px 12px;font-size:12px;line-height:1.3;text-decoration:none;display:flex}.theory-sidebar>a:first-child{color:#174a8b;margin:0 0 26px;padding-left:0;font-weight:700}.theory-sidebar>a.active{color:#174a8b;background:#dfeaf0;font-weight:700}.theory-sidebar>a:hover{color:#174a8b}.theory-sidebar .theory-kicker{margin:0 0 10px 12px;display:block}.theory-sidebar small{font:11px IBM Plex Mono,monospace}.theory-article{min-width:0;max-width:820px}.theory-breadcrumb{color:#758b99;letter-spacing:.08em;gap:12px;font:11px IBM Plex Mono,monospace;display:flex}.theory-breadcrumb a{color:#174a8b;text-decoration:none}.theory-article>header{border-bottom:1px solid #bdced9;padding:64px 0 47px}.theory-article h1{letter-spacing:-.06em;margin:14px 0 22px;font-size:clamp(41px,5vw,68px);line-height:1.06}.theory-article>header p{color:#4b6475;max-width:720px;font-size:21px;line-height:1.6}.theory-content section{padding:44px 0 8px}.theory-content h2{letter-spacing:-.045em;margin:12px 0 15px;font-size:30px}.theory-content section>p{color:#344d5e;margin:0;font-size:17px;line-height:1.9}.theory-formula{color:#e8edf2;background:#101c2a;border-left:4px solid #62d8e8;margin:33px 0;padding:25px 28px}.theory-formula span{color:#78b3c5;letter-spacing:.12em;font:10px IBM Plex Mono,monospace;display:block}.theory-formula code{white-space:pre-wrap;overflow-wrap:anywhere;color:#79e0e9;margin:15px 0;font:17px/1.7 IBM Plex Mono,monospace;display:block}.theory-formula p{color:#b5cbd7;margin:0;font-size:13px;line-height:1.7}.theory-lab-link{margin:25px 0 5px}.theory-note{background:#ecedf0;border-left:4px solid #f2b45b;margin:45px 0;padding:22px 25px}.theory-note span{letter-spacing:.1em;color:#9b672e;font:11px IBM Plex Mono,monospace}.theory-note p{color:#435a68;margin:10px 0 0;font-size:15px;line-height:1.75}.theory-check{border-top:1px solid #afc4d1;border-bottom:1px solid #afc4d1;margin:45px 0;padding:20px 0}.theory-check summary{cursor:pointer;justify-content:space-between;font-size:17px;font-weight:700;list-style:none;display:flex}.theory-check summary span{color:#174a8b;font-size:25px}.theory-check p{color:#4d6575;font-size:16px;line-height:1.7}.theory-check strong{color:#174a8b;background:#e2edf2;padding:15px 18px;font-size:15px;line-height:1.7;display:block}.theory-next{justify-content:space-between;gap:15px;margin-top:54px;display:flex}.theory-next a{color:#174a8b;align-items:center;gap:12px;max-width:48%;font-size:12px;text-decoration:none;display:flex}.theory-next a:last-child{text-align:right}.theory-next strong{color:#17232f;margin-top:5px;font-size:15px;display:block}.loop-explorer{color:#e8edf2;background:#101c2a;border:1px solid #436176;margin:35px 0;padding:26px}.loop-explorer-top{flex-wrap:wrap;justify-content:space-between;gap:15px;display:flex}.loop-explorer-top .theory-kicker{color:#62d8e8}.loop-explorer-top strong{font-size:14px}.loop-explorer svg{width:min(100%,390px);height:auto;margin:15px auto;display:block}.loop-sliders{grid-template-columns:1fr 1fr;gap:25px;display:grid}.loop-sliders label{grid-template-columns:1fr auto;gap:10px;font-size:13px;display:grid}.loop-sliders input{accent-color:#62d8e8;grid-column:1/3;width:100%}.loop-explorer>p{color:#a6bdcb;margin:20px 0 0;font-size:12px;line-height:1.7}@media (max-width:900px){.theory-article-shell{grid-template-columns:1fr;gap:28px}.theory-sidebar{white-space:nowrap;border-bottom:1px solid #c5d2db;border-right:0;max-height:none;padding:0 0 10px;display:flex;position:static;overflow-x:auto}.theory-sidebar .theory-kicker,.theory-sidebar>a:first-child{display:none}.theory-sidebar>a{flex-shrink:0}.theory-article>header{padding-top:35px}}@media (max-width:600px){.theory-header{height:auto;min-height:65px;padding:13px 18px}.theory-logo{font-size:16px}.theory-logo span{display:none}.theory-header nav{gap:12px}.theory-header nav a,.theory-header nav button{font-size:10px}.theory-hero{padding:65px 22px}.theory-hero:after{font-size:230px;top:-25px;right:-35px}.theory-hero p{font-size:16px}.theory-index{padding:45px 18px 70px}.theory-index-intro{display:block}.theory-index-intro p{margin-top:15px}.theory-chapter-card{grid-template-columns:40px 1fr 18px;gap:12px;padding:18px 4px}.theory-chapter-card h2{font-size:19px}.theory-chapter-card p{font-size:12px}.theory-number{font-size:20px}.theory-article-shell{padding:25px 18px 70px}.theory-article>header p{font-size:18px}.theory-content section>p{font-size:15px}.theory-content h2{font-size:25px}.theory-formula code{font-size:14px}.loop-sliders{grid-template-columns:1fr}}.theory-diagram{background:#e7eef2;border:1px solid #bed0da;margin:32px 0 0;padding:22px}.theory-diagram figcaption{letter-spacing:.09em;color:#174a8b;font:600 11px IBM Plex Mono,monospace}.theory-diagram svg{width:100%;height:auto;margin:16px auto;display:block}.theory-diagram svg text{font-family:IBM Plex Mono,Noto Sans KR Variable,monospace;font-size:13px}.theory-diagram p{color:#506a79;margin:0;font-size:13px;line-height:1.7}