.chat-hub{max-width:880px;margin:0 auto;padding:clamp(28px,6vw,56px) clamp(20px,5vw,32px) clamp(48px,8vw,72px);color:var(--saju-ink)}.chat-hub__masthead{margin-bottom:clamp(32px,6vw,48px)}.chat-hub__masthead-label{display:flex;align-items:center;gap:12px;font-family:var(--font-mono);font-size:var(--fs-2xs);letter-spacing:.32em;text-transform:uppercase;color:var(--saju-text-muted);margin:0 0 clamp(20px,4vw,28px);font-weight:600}.chat-hub__masthead-label:before{content:"";width:24px;height:1px;background:var(--saju-accent);flex:0 0 auto}.chat-hub__title{font-size:clamp(30px,7vw,48px);font-weight:700;letter-spacing:-.015em;line-height:1.18;color:var(--saju-ink);margin:0 0 clamp(16px,3vw,22px)}.chat-hub__masthead-sub{font-size:var(--fs-base);line-height:1.75;color:var(--saju-text-mid);max-width:38em;margin:0;padding-top:clamp(14px,3vw,18px);border-top:1px solid var(--saju-border-light)}.chat-hub__list{display:grid;grid-template-columns:1fr;gap:14px}@media(min-width:720px){.chat-hub__list{grid-template-columns:repeat(2,1fr);gap:18px}.chat-entry--feature{grid-column:1 / -1}}.chat-entry{display:flex;flex-direction:column;gap:14px;padding:clamp(22px,4vw,30px);background:var(--saju-cream-card);border:1px solid var(--saju-border-light);border-radius:16px;text-decoration:none;color:inherit;position:relative;overflow:hidden;transition:transform .24s var(--saju-ease),border-color .24s var(--saju-ease),box-shadow .24s var(--saju-ease)}.chat-entry--feature{padding:clamp(28px,5vw,44px);gap:16px}a.chat-entry:hover{transform:translateY(-3px);border-color:var(--card-accent, var(--saju-accent));box-shadow:0 18px 40px -22px color-mix(in srgb,var(--card-accent, var(--saju-accent)) 38%,transparent),0 4px 12px -8px #1a1a1a14}a.chat-entry:focus-visible{outline:2px solid var(--saju-accent);outline-offset:4px}a.chat-entry:active{transform:translateY(-1px)}a.chat-entry:hover .chat-entry__title{color:var(--card-accent, var(--saju-accent))}.chat-entry--feature:before{content:attr(data-num);position:absolute;right:clamp(-20px,-2vw,-8px);bottom:clamp(-56px,-8vw,-32px);font-family:var(--font-mono);font-size:clamp(140px,22vw,260px);font-weight:700;line-height:1;color:var(--card-accent);opacity:.06;pointer-events:none;letter-spacing:-.05em;font-variant-numeric:tabular-nums;user-select:none}.chat-entry__head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;position:relative;z-index:1}.chat-entry__num{font-family:var(--font-mono);font-weight:700;font-size:var(--fs-lg);color:var(--card-accent, var(--saju-accent));letter-spacing:.04em;font-variant-numeric:tabular-nums;flex:0 0 auto}.chat-entry--feature .chat-entry__num{font-size:var(--fs-4xl);line-height:1}.chat-entry__glyph{font-family:var(--font-thai);font-size:var(--fs-xl);color:var(--saju-ink);font-weight:500;line-height:1;letter-spacing:.02em;flex:0 0 auto;opacity:.6}.chat-entry--feature .chat-entry__glyph{font-size:var(--fs-3xl);opacity:.7}.chat-entry__discipline{font-family:var(--font-mono);font-size:var(--fs-2xs);letter-spacing:.24em;text-transform:uppercase;color:var(--saju-text-mid);font-weight:600;flex:1 1 auto;min-width:0}.chat-entry__tag{font-family:var(--font-mono);font-size:var(--fs-2xs);letter-spacing:.16em;text-transform:uppercase;color:var(--saju-text-muted);font-weight:600;padding:3px 10px;border:1px solid var(--saju-border-light);border-radius:100px;flex:0 0 auto;white-space:nowrap}.chat-entry__title{font-size:clamp(20px,3.5vw,24px);font-weight:700;letter-spacing:-.005em;line-height:1.28;color:var(--saju-ink);margin:0;transition:color .18s var(--saju-ease);position:relative;z-index:1}.chat-entry--feature .chat-entry__title{font-size:clamp(26px,5vw,36px);line-height:1.18;letter-spacing:-.015em}.chat-entry__body{font-size:var(--fs-base);color:var(--saju-text-mid);line-height:1.75;margin:0;position:relative;z-index:1}.chat-entry--feature .chat-entry__body{font-size:var(--fs-md);max-width:36em}.chat-entry__questions{list-style:none;display:flex;flex-direction:column;align-items:flex-start;gap:8px;margin:0;padding:0;flex:1 1 auto;position:relative;z-index:1}.chat-entry__question{font-size:var(--fs-sm);line-height:1.6;color:var(--saju-text-mid);background:var(--saju-cream-dim);border:1px solid var(--saju-border-light);border-radius:14px 14px 14px 4px;padding:7px 14px;max-width:100%}.chat-entry--preview .chat-entry__question{opacity:.7}.chat-entry__cta{display:inline-flex;align-items:center;gap:12px;margin-top:6px;font-family:var(--font-mono);font-size:var(--fs-2xs);font-weight:700;color:var(--card-accent, var(--saju-accent));letter-spacing:.24em;text-transform:uppercase;align-self:flex-start;position:relative;z-index:1}.chat-entry__cta-rule{display:inline-block;width:24px;height:1px;background:currentColor;position:relative;transition:width .24s var(--saju-ease)}.chat-entry__cta-rule:after{content:"";position:absolute;right:0;top:-3px;width:7px;height:7px;border-right:1px solid currentColor;border-top:1px solid currentColor;transform:rotate(45deg)}a.chat-entry:hover .chat-entry__cta-rule{width:40px}.chat-entry--preview{cursor:default;opacity:.65}.chat-entry--preview .chat-entry__glyph{opacity:.4}.chat-entry--preview .chat-entry__cta{color:var(--saju-text-muted);font-style:italic;text-transform:none;letter-spacing:.06em;font-weight:500;font-family:var(--font-thai);font-size:var(--fs-sm)}.chat-hub__footer{margin-top:clamp(36px,6vw,56px)}.chat-hub__footer-rule{width:56px;height:1px;background:var(--saju-accent);border:0;margin:0 0 18px}.chat-hub__footer p{font-size:var(--fs-sm);color:var(--saju-text-muted);line-height:1.75;margin:0;max-width:36em}@keyframes chat-hub-fade-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.chat-hub__masthead,.chat-entry,.chat-hub__footer{animation:chat-hub-fade-in .7s var(--saju-ease) both}.chat-entry:nth-child(1){animation-delay:.08s}.chat-entry:nth-child(2){animation-delay:.15s}.chat-entry:nth-child(3){animation-delay:.22s}.chat-entry:nth-child(4){animation-delay:.29s}.chat-hub__list+.chat-hub__footer{animation-delay:.37s}@media(max-width:360px){.chat-entry{padding:20px}}@media(prefers-reduced-motion:reduce){.chat-hub__masthead,.chat-entry,.chat-hub__footer,.chat-entry__title,.chat-entry__cta-rule{animation:none;transition:none}a.chat-entry:hover{transform:none;box-shadow:none}a.chat-entry:hover .chat-entry__cta-rule{width:24px}}
