:root{color-scheme:light;font-family:Pretendard,-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans KR','Malgun Gothic',sans-serif;color:#191f28;background:#f5f7fa;font-size:18px;font-synthesis:none;line-height:1.65;letter-spacing:-.035em;--blue:#3182f6;--blue-ink:#1b64da;--muted:#6b7684;--line:#e8edf3}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}h1,h2,h3,p{margin:0}button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px;border-radius:8px}::selection{background:#d7e8ff}.skip{position:absolute;top:-100px;left:20px;z-index:20;padding:12px 20px;border-radius:0 0 12px 12px;color:#fff;background:var(--blue)}.skip:focus{top:0}
.site-header{display:flex;align-items:center;justify-content:space-between;min-height:88px;padding:0 max(28px,calc((100vw - 1200px)/2));border-bottom:1px solid var(--line);background:#fff}.wordmark{display:inline-flex;align-items:baseline;font-size:32px;font-weight:900;line-height:1.3;letter-spacing:-.09em;color:#172b49}.wordmark>span{color:var(--blue)}.wordmark small{margin-left:18px;font-size:14px;font-weight:500;letter-spacing:-.035em;color:var(--muted)}.header-link{display:inline-flex;align-items:center;gap:12px;min-height:48px;font-size:15px;font-weight:600;color:#4e5968}.header-link>span{font-size:22px;color:var(--blue)}
.watch-main,.topic-main{max-width:1200px;margin:0 auto;padding:30px 28px 72px}.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:28px;font-size:13px;color:#8b95a1}.breadcrumbs a{display:inline-flex;align-items:center;min-height:40px;color:#6b7684}.breadcrumbs a:hover{color:var(--blue-ink)}.breadcrumbs>span[aria-current]{color:#4e5968}
.watch-layout{display:grid;grid-template-columns:360px minmax(0,1fr);grid-template-rows:auto 1fr;column-gap:60px;align-items:start;padding:40px;border:1px solid #e9edf2;border-radius:28px;background:#fff;box-shadow:0 8px 36px #253e6110}.video-stage{grid-column:1;grid-row:1/3;min-width:0}.player{width:100%;margin:0 auto;overflow:hidden;aspect-ratio:9/16;border-radius:20px;background:#101521;box-shadow:0 12px 30px #172f5226}.player iframe{display:block;width:100%;height:100%;border:0}.player-tip{margin-top:18px;font-size:13px;line-height:1.8;text-align:center;color:#8b95a1}.player-tip a{display:inline-flex;align-items:center;min-height:40px;color:#4e5968;text-decoration:underline;text-underline-offset:4px}
.video-heading{grid-column:2;grid-row:1;padding-top:12px}.category-pill{display:inline-flex;align-items:center;justify-content:space-between;gap:18px;min-height:44px;padding:8px 14px;border-radius:12px;background:#edf4ff;color:var(--blue-ink);font-size:14px;font-weight:600}.category-pill:hover{background:#e0edff}.video-heading h1{margin:20px 0 16px;font-size:32px;line-height:1.5;font-weight:750;letter-spacing:-.055em;word-break:keep-all;overflow-wrap:anywhere}.video-source{display:flex;align-items:center;flex-wrap:wrap;gap:14px;color:#8b95a1;font-size:13px;line-height:1.7}.video-source>span{display:inline-flex;align-items:center;gap:6px;color:#548566;font-weight:500}.video-source>span::before{content:'';width:5px;height:5px;border-radius:50%;background:#70a683}.video-copy{grid-column:2;grid-row:2;min-width:0;padding-top:28px}.video-description{margin-bottom:25px;color:#4e5968;font-size:17px;line-height:1.9;word-break:keep-all;overflow-wrap:anywhere}
.video-copy .watch-actions{gap:10px;margin:0 0 28px}.video-copy .watch-button{flex:1;min-height:52px;padding:12px 18px;border-radius:14px;font-size:16px;color:#4e5968;background:#f9fafb;border-color:#e5e8eb}.video-copy .watch-button:hover{color:var(--blue-ink);border-color:#c1d8fc;background:#edf4ff}.video-copy .watch-button svg{width:21px;height:21px}.video-copy .watch-status{font-size:13px;line-height:1.7;color:#6b7684}.video-copy .watch-status:empty{display:none}
.sample-note{display:flex;align-items:baseline;gap:9px;margin:24px 0;padding:16px;border-radius:14px;background:#f5f7fa;color:#6b7684;font-size:14px;line-height:1.8}.small-heading{margin:0 0 12px;color:#4e5968;font-size:15px;font-weight:600}.keywords{display:flex;flex-wrap:wrap;gap:8px}.keyword{display:inline-flex;align-items:center;min-height:42px;padding:8px 12px;border:1px solid transparent;border-radius:11px;background:#f2f4f6;color:#6b7684;font-size:14px;line-height:1.5;overflow-wrap:anywhere;transition:background .16s,color .16s}.keyword:hover{border-color:#c9ddff;background:#edf4ff;color:var(--blue-ink)}.library-cta{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:56px;margin-top:28px;padding:16px 18px;border-radius:14px;background:#edf4ff;color:var(--blue-ink);font-size:15px;font-weight:600}.library-cta:hover{background:#e1edff}
.next-section{margin-top:56px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}.eyebrow{display:block;margin-bottom:8px;color:#8b95a1;font-size:13px;font-weight:500;letter-spacing:-.02em}.section-heading h2,.services h2{color:#333d4b;font-size:25px;line-height:1.5;font-weight:700;letter-spacing:-.05em}.section-heading>a{display:inline-flex;align-items:center;min-height:44px;color:#6b7684;font-size:14px;white-space:nowrap}.related-grid,.topic-videos{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.watch-card{min-width:0}.watch-card-link{position:relative;display:block;height:100%;overflow:hidden;border:1px solid #e8edf3;border-radius:20px;background:#fff;transition:box-shadow .18s,transform .18s}.watch-card-link:hover{box-shadow:0 8px 24px #23477312;transform:translateY(-3px)}.watch-art{position:relative;display:block;overflow:hidden;aspect-ratio:16/10;background:#e9eef5}.watch-art img{width:100%;height:100%;object-fit:cover;transition:transform .25s}.watch-card-link:hover .watch-art img{transform:scale(1.025)}.play{position:absolute;left:14px;bottom:14px;display:grid;place-items:center;width:36px;height:36px;padding-left:2px;border:1px solid #ffffff55;border-radius:50%;background:#172e4e9e;color:#fff;font-size:12px;line-height:1;backdrop-filter:blur(8px)}.watch-card-copy{padding:19px 42px 24px 20px}.card-category{display:block;margin-bottom:6px;color:#8b95a1;font-size:13px;line-height:1.5}.watch-card h3{margin:0 0 12px;color:#333d4b;font-size:18px;line-height:1.55;font-weight:650;word-break:keep-all;overflow-wrap:anywhere}.watch-card-link:hover h3{color:var(--blue-ink)}.watch-card p{color:#8b95a1;font-size:13px;line-height:1.6;word-break:keep-all}.card-next{position:absolute;right:19px;bottom:22px;color:#b0b8c1;font-size:21px}
.services{display:grid;grid-template-columns:1fr 1.3fr;align-items:center;gap:30px;margin-top:56px;padding:32px;border-radius:24px;background:#eaf2ff}.services .eyebrow{color:#7293c1}.services h2{color:#33567e;font-size:23px;word-break:keep-all}.service-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.service-links>a{display:grid;gap:7px;padding:20px;border:1px solid #fff;border-radius:17px;background:#ffffffc9}.service-links>a:hover{background:#fff}.service-links>a>span{color:#8a9bb3;font-size:12px}.service-links strong{display:flex;justify-content:space-between;gap:12px;color:#3d6aa5;font-size:15px;font-weight:600}.site-footer{display:flex;align-items:center;gap:30px;padding:36px max(28px,calc((100vw - 1144px)/2));border-top:1px solid var(--line);background:#fff}.site-footer .wordmark{font-size:28px}.site-footer p{color:#8b95a1;font-size:12px;line-height:1.9}.site-footer>a:last-child{display:inline-flex;align-items:center;min-height:44px;margin-left:auto;color:#6b7684;font-size:13px}
.topic-intro{padding:16px 0 36px}.topic-intro h1{margin:6px 0 16px;font-size:38px;font-weight:750;line-height:1.5;letter-spacing:-.06em}.topic-intro>p:not(.sample-note){margin-bottom:26px;color:#6b7684;font-size:18px;line-height:1.8}.topic-intro .sample-note{display:inline-flex;padding:0;background:none}.topic-videos{row-gap:26px}.other-topics{margin-top:48px;padding-top:32px;border-top:1px solid var(--line)}.other-topics h2{margin-bottom:20px;font-size:23px;font-weight:700}.other-topics nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.other-topics a{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:58px;padding:16px 20px;border:1px solid var(--line);border-radius:14px;background:#fff;color:#6b7684;font-size:15px}.other-topics a:hover{border-color:#c3d9fd;color:var(--blue-ink)}
@media(max-width:1040px){.watch-layout{grid-template-columns:320px minmax(0,1fr);column-gap:36px;padding:30px}.video-heading h1{font-size:29px}.video-source{gap:8px}.services{grid-template-columns:1fr;gap:22px}.service-links>a{grid-template-columns:1fr 1fr;align-items:center}}
@media(max-width:800px){.watch-main,.topic-main{padding:22px 24px 56px}.watch-layout{display:flex;flex-direction:column;gap:0;padding:28px}.video-heading{width:100%;padding:0 0 25px}.video-stage{width:100%}.player{width:min(100%,360px)}.video-copy{width:100%;padding-top:30px}.video-copy .watch-actions{margin-bottom:24px}.video-copy .watch-status{flex-basis:100%}.related-grid,.topic-videos{gap:18px}.watch-card-copy{padding:16px 16px 24px}.watch-card h3{font-size:16px}.card-next{display:none}.watch-card p,.card-category{font-size:12px}.other-topics nav{grid-template-columns:repeat(2,minmax(0,1fr))}.site-footer>a:last-child{display:none}}
@media(max-width:620px){.site-header{min-height:72px;padding:0 22px}.wordmark{font-size:30px}.wordmark small{display:none}.header-link{gap:10px;font-size:14px}.watch-main,.topic-main{padding:14px 20px 44px}.breadcrumbs{gap:8px;margin-bottom:18px;font-size:12px}.watch-layout{padding:0;border:0;border-radius:0;background:none;box-shadow:none}.video-heading{padding-bottom:24px}.category-pill{gap:15px;min-height:40px;padding:7px 12px;font-size:13px;border-radius:10px}.video-heading h1{margin:16px 0 13px;font-size:26px;line-height:1.5}.video-source{gap:10px;font-size:13px}.player{width:min(100%,352px);width:min(100%,352px,calc(58vh * 9 / 16));width:min(100%,352px,calc(58dvh * 9 / 16));border-radius:20px}.player-tip{margin-top:11px;font-size:13px}.video-copy{padding-top:24px}.video-description{margin-bottom:24px;font-size:18px;line-height:1.85}.video-copy .watch-actions{gap:10px;margin-bottom:24px}.video-copy .watch-button{flex:1;min-height:52px;padding:12px 16px;font-size:16px}.small-heading{margin-bottom:12px;font-size:16px}.keywords{gap:8px}.keyword{min-height:44px;padding:9px 12px;font-size:14px}.library-cta{min-height:58px;margin-top:24px;padding:17px 18px;font-size:16px}.next-section{margin-top:44px}.section-heading{align-items:flex-start;flex-wrap:wrap;gap:4px 16px;margin-bottom:18px}.eyebrow{margin-bottom:6px;font-size:12px}.section-heading h2{font-size:23px}.section-heading>a{min-height:38px;font-size:13px}.related-grid,.topic-videos{grid-template-columns:1fr;gap:12px}.watch-card-link{display:grid;grid-template-columns:112px minmax(0,1fr);align-items:stretch;min-height:142px;padding:14px;column-gap:15px;border-radius:18px}.watch-card-link:hover{transform:none}.watch-art{align-self:center;aspect-ratio:1;border-radius:12px}.play{left:9px;bottom:9px;width:28px;height:28px;font-size:10px}.watch-card-copy{min-width:0;padding:2px 0}.card-category{margin-bottom:5px;font-size:12px}.watch-card h3{margin-bottom:9px;font-size:17px;line-height:1.5}.watch-card p{font-size:12px;line-height:1.6}.services{gap:20px;margin-top:44px;padding:25px 22px;border-radius:22px}.services h2{font-size:22px}.service-links{grid-template-columns:1fr;gap:10px}.service-links>a{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px;padding:16px;border-radius:14px}.service-links>a>span{max-width:110px;color:#71849f;font-size:12px}.service-links strong{gap:12px;font-size:14px}.site-footer{align-items:flex-start;gap:24px;padding:28px 22px max(28px,env(safe-area-inset-bottom))}.site-footer .wordmark{font-size:26px}.site-footer p{font-size:11px}.topic-intro{padding:12px 0 28px}.topic-intro h1{margin:6px 0 14px;font-size:32px;line-height:1.4}.topic-intro>p:not(.sample-note){font-size:17px;line-height:1.85}.other-topics{margin-top:38px;padding-top:28px}.other-topics h2{font-size:22px}.other-topics nav{grid-template-columns:1fr;gap:10px}.other-topics a{min-height:56px;padding:15px 18px;font-size:16px}.watch-main .gossol-outro-prompt p{font-size:16px}.watch-main .gossol-outro-prompt button{min-height:48px;font-size:15px}.watch-main .gossol-outro-end>p{font-size:16px}.watch-main .gossol-outro-actions button{min-height:46px;font-size:14px}}
@media(max-width:360px){.watch-main,.topic-main{padding-left:16px;padding-right:16px}.watch-card-link{grid-template-columns:92px minmax(0,1fr);column-gap:12px;padding:12px}.watch-card h3{font-size:16px}.service-links>a{display:grid;gap:6px}.service-links>a>span{max-width:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}

/* Academy identity and consultation cards. */
.academy-brand{display:inline-flex;flex-direction:column;align-items:flex-start;gap:1px;color:#4e5968;white-space:nowrap;letter-spacing:-.04em;line-height:1.2}
.academy-brand>span{font-size:14px;font-weight:600}
.academy-brand>strong{font-size:25px;font-weight:800;letter-spacing:-.06em;color:#2678eb}
.academy-brand>strong>span{color:#7bb1ff}
.site-footer .academy-brand>span{font-size:12px}
.site-footer .academy-brand>strong{font-size:22px}
.service-links>button{display:grid;gap:7px;padding:20px;border:1px solid #fff;border-radius:17px;background:#ffffffc9;text-align:left;font:inherit;letter-spacing:inherit;cursor:pointer}
.service-links>button:hover{background:#fff}
.service-links>button>span{color:#8a9bb3;font-size:12px}
.video-copy .watch-button{flex:0 1 auto;min-width:180px}
@media(max-width:1040px){.service-links>button{grid-template-columns:1fr 1fr;align-items:center}}
@media(max-width:620px){.academy-brand>span{font-size:13px}.academy-brand>strong{font-size:24px}.service-links>button{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px;padding:16px;border-radius:14px}.service-links>button>span{max-width:110px;color:#71849f;font-size:12px}.video-copy .watch-button{flex:1;min-width:0}}
@media(max-width:360px){.service-links>button{display:grid;gap:6px}.service-links>button>span{max-width:none}}