:root{--bg: #ffffff;--ink: #141414;--ink-soft: #6f6f6f;--accent: #e63b2e;--radius: 4px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Pretendard Variable,Pretendard,-apple-system,BlinkMacSystemFont,Segoe UI,Malgun Gothic,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}a{color:var(--ink);text-decoration:none}.site-header{border-bottom:3px solid var(--ink);background:var(--bg)}.site-header__inner{max-width:780px;margin:0 auto;padding:1.1rem 1.25rem;display:flex;align-items:baseline;justify-content:space-between;gap:1rem}.site-header__logo{font-weight:800;font-size:1.15rem;letter-spacing:-.01em}.site-header__logo em{color:var(--accent);font-style:normal}.site-header__nav{color:var(--ink-soft);font-size:.9rem;letter-spacing:.08em}.container{max-width:780px;margin:0 auto;padding:2.5rem 1.25rem 4rem}.site-footer{border-top:3px solid var(--ink);color:var(--ink-soft);font-size:.82rem;letter-spacing:.05em;text-align:center;padding:1.5rem 1rem 2.5rem}.page-title{font-size:2rem;font-weight:900;letter-spacing:-.02em;margin:0 0 .4rem}.page-subtitle{color:var(--ink-soft);margin:0 0 2.5rem;font-size:.95rem}.lecture-list{list-style:none;padding:0;margin:0}.lecture-card{display:block;padding:1.6rem .5rem;border-bottom:2px solid var(--ink);color:inherit;transition:background .12s ease}.lecture-list>li:first-child>.lecture-card{border-top:2px solid var(--ink)}.lecture-card:hover{background:var(--ink);color:var(--bg)}.lecture-card:hover .lecture-card__desc,.lecture-card:hover .lecture-card__meta{color:#ffffffb8}.lecture-card:hover .tag{border-color:var(--accent);color:var(--accent)}.lecture-card__index{display:block;color:var(--accent);font-size:.8rem;font-weight:800;letter-spacing:.18em;margin-bottom:.4rem}.lecture-card__title{font-size:1.35rem;font-weight:800;letter-spacing:-.01em;margin:0 0 .4rem}.lecture-card__desc{color:var(--ink-soft);font-size:.95rem;margin:0 0 .9rem}.lecture-card__meta{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;font-size:.8rem;color:var(--ink-soft);letter-spacing:.04em}.tag{border:1.5px solid var(--ink);border-radius:2px;padding:.05rem .5rem;font-weight:600}.lecture-header{border-bottom:2px solid var(--ink);padding-bottom:1.5rem;margin-bottom:2.2rem}.lecture-header h1{font-size:1.8rem;font-weight:900;letter-spacing:-.02em;line-height:1.4;margin:0 0 .6rem}.lecture-header__desc{color:var(--ink-soft);margin:0 0 1rem}.lecture-header__meta{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;font-size:.8rem;color:var(--ink-soft);letter-spacing:.04em}.prose{font-size:1.02rem}.prose h2{font-size:1.35rem;font-weight:900;letter-spacing:-.01em;margin:2.8rem 0 1rem;padding-bottom:.5rem;border-bottom:3px solid var(--accent)}.prose ul{padding-left:1.2rem}.prose li{margin-bottom:.55rem}.prose li::marker{color:var(--accent)}.prose hr{border:none;border-top:1px solid var(--ink);margin:2rem 0}.prose strong{color:var(--accent)}.video-slot{margin:1.8rem 0}.video-slot__player{position:relative;aspect-ratio:16 / 9;background:var(--bg);border:2px dashed var(--ink);overflow:hidden;display:grid;place-items:center}.video-slot__player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.video-slot--pending .video-slot__player{background:var(--ink);border-style:solid}.video-slot__pending{color:#fff;display:flex;flex-direction:column;align-items:center;gap:.7rem;font-size:.85rem;letter-spacing:.2em}.video-slot__play{width:3.4rem;height:3.4rem;border-radius:50%;border:2px solid var(--accent);color:var(--accent);display:grid;place-items:center;font-size:1.1rem;padding-left:.2rem}.video-slot__caption{font-size:.88rem;color:var(--ink-soft);padding:.8rem .2rem 0}.video-slot__caption strong{color:var(--ink);letter-spacing:.02em}.video-slot__caption strong:before{content:"▶";color:var(--accent);margin-right:.45em;font-size:.8em}.video-slot__caption p{margin:.2rem 0 0}.home-section{margin-bottom:2.6rem}.home-section h2{font-size:1.15rem;font-weight:900;letter-spacing:-.01em;margin:0 0 .8rem;padding-bottom:.45rem;border-bottom:3px solid var(--accent)}.home-section p{margin:0}.home-section strong{color:var(--accent)}.home-flow{margin:0;padding-left:1.2rem}.home-flow li{margin-bottom:.5rem}.home-flow li::marker{color:var(--accent);font-weight:800}.home-cta{display:inline-block;margin-top:.8rem;font-weight:800;border-bottom:2px solid var(--accent);padding-bottom:.1rem}.home-cta:hover{color:var(--accent)}.pager{display:flex;justify-content:space-between;gap:1rem;margin-top:2.8rem;border-top:3px solid var(--ink);padding-top:1.2rem}.pager__link{display:flex;flex-direction:column;gap:.15rem;max-width:46%;transition:color .12s ease}.pager__link--next{text-align:right;margin-left:auto}.pager__label{color:var(--accent);font-size:.78rem;font-weight:800;letter-spacing:.12em}.pager__title{font-weight:700;font-size:.95rem}.pager__link:hover .pager__title{color:var(--accent)}.comment-fab{position:fixed;right:1.1rem;bottom:1.1rem;z-index:40;background:var(--ink);color:var(--bg);border:none;border-radius:999px;padding:.55rem 1rem;font-size:.85rem;font-weight:700;cursor:pointer;box-shadow:0 2px 10px #00000040;transition:background .12s ease}.comment-fab:hover{background:var(--accent)}.comment-float{position:absolute;z-index:50;transform:translate(-50%);background:var(--ink);color:var(--bg);border:none;border-radius:3px;padding:.4rem .75rem;font-size:.8rem;font-weight:700;cursor:pointer;box-shadow:0 2px 8px #00000040;transition:background .12s ease}.comment-float:hover{background:var(--accent)}.back-link{display:inline-block;margin-top:2.5rem;font-size:.9rem;color:var(--ink-soft);letter-spacing:.05em}.back-link:hover{color:var(--accent)}@media(max-width:560px){.container{padding:1.8rem 1rem 3rem}.page-title{font-size:1.6rem}}