.muxapp-hcn{--ink:#101827;--muted:#64748b;--line:#e6eaf1;--purple:#6d28d9;--cyan:#0891b2;--pink:#db2777;max-width:1240px;margin:0 auto;padding:18px;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;color:var(--ink)}
.muxapp-hcn *{box-sizing:border-box}.hcn-hero{position:relative;overflow:hidden;text-align:center;border:1px solid var(--line);border-radius:32px;padding:56px 22px 48px;background:radial-gradient(circle at 10% 10%,rgba(109,40,217,.16),transparent 28%),radial-gradient(circle at 90% 15%,rgba(8,145,178,.14),transparent 28%),linear-gradient(135deg,#fff,#faf7ff 52%,#f2fbff);box-shadow:0 24px 70px rgba(15,23,42,.09)}
.hcn-hero:after{content:"";position:absolute;left:-90px;bottom:-120px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(219,39,119,.12),transparent 68%);pointer-events:none}.hcn-logo{position:relative;z-index:2;max-height:70px;max-width:240px;object-fit:contain;margin-bottom:14px}.hcn-kicker{position:relative;z-index:2;font-size:11px;font-weight:900;letter-spacing:.24em;color:var(--purple)}.hcn-hero h1{position:relative;z-index:2;font-size:clamp(34px,6vw,58px);line-height:1.02;margin:9px 0 13px;letter-spacing:-.04em}.hcn-hero p{position:relative;z-index:2;max-width:760px;margin:0 auto 28px;color:var(--muted);font-size:16px;line-height:1.7}.hcn-pulse{position:absolute;width:230px;height:230px;border-radius:50%;right:-70px;top:-100px;background:radial-gradient(circle,rgba(109,40,217,.22),rgba(8,145,178,.05) 45%,transparent 70%);animation:hcnpulse 3.2s ease-in-out infinite}@keyframes hcnpulse{50%{transform:scale(1.18);opacity:.55}}
.hcn-search{position:relative;z-index:2;display:flex;align-items:center;gap:12px;max-width:780px;margin:auto;background:rgba(255,255,255,.94);border:1px solid #dfe4ed;border-radius:20px;padding:0 18px;box-shadow:0 14px 34px rgba(15,23,42,.1)}.hcn-search span{font-size:28px;color:var(--purple)}.hcn-search input{width:100%;border:0;outline:0;padding:18px 0;font-size:16px;background:transparent;color:var(--ink)}
.hcn-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px 2px 12px}.hcn-home,.hcn-clear{border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 15px;text-decoration:none;color:var(--ink);cursor:pointer;font-weight:800;box-shadow:0 5px 16px rgba(15,23,42,.04)}.hcn-home:hover,.hcn-clear:hover{border-color:#c4b5fd;transform:translateY(-1px)}.hcn-clear{color:var(--purple)}
.hcn-topics{display:flex;gap:8px;overflow:auto;padding:2px 0 20px;scrollbar-width:thin}.hcn-topic{white-space:nowrap;border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 14px;cursor:pointer;font-weight:700;color:#475569}.hcn-topic:hover{border-color:#c4b5fd;color:var(--purple)}.hcn-topic.active{background:linear-gradient(135deg,#111827,#312e81);color:#fff;border-color:#111827;box-shadow:0 7px 20px rgba(49,46,129,.2)}
.hcn-status{display:flex;align-items:center;min-height:26px;color:var(--muted);font-size:13px;margin:2px 0 12px;font-weight:700}.hcn-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.hcn-card{position:relative;display:flex;flex-direction:column;text-align:left;gap:9px;min-height:220px;padding:22px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(180deg,#fff,#fbfcff);cursor:pointer;box-shadow:0 10px 28px rgba(15,23,42,.055);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}.hcn-card:before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:5px;background:linear-gradient(#6d28d9,#0891b2)}.hcn-card:hover{transform:translateY(-4px);box-shadow:0 18px 42px rgba(15,23,42,.11);border-color:#d9d2ff}.hcn-card strong{font-size:18px;line-height:1.35}.hcn-card span:not(.hcn-card-topic){color:var(--muted);font-size:14px;line-height:1.65}.hcn-card-topic,.hcn-article-topic{font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.14em;color:var(--purple)}.hcn-card i{font-style:normal;font-size:13px;font-weight:900;margin-top:auto;color:#334155}
.hcn-article{padding:clamp(22px,4vw,42px);border:1px solid var(--line);border-radius:26px;background:#fff;box-shadow:0 16px 46px rgba(15,23,42,.07)}.hcn-back{border:0;background:#f8f7ff;cursor:pointer;margin-bottom:22px;color:var(--purple);font-weight:900;border-radius:999px;padding:10px 14px}.hcn-article h2{font-size:clamp(28px,4vw,44px);line-height:1.08;margin:8px 0 22px;letter-spacing:-.03em}.hcn-article-body{font-size:16px;line-height:1.85;color:#334155}.hcn-article-body h3{font-size:21px;line-height:1.25;color:#111827;margin:32px 0 10px;padding-top:4px}.hcn-article-body p{margin:0 0 16px}.hcn-article-body ul,.hcn-article-body ol{margin:8px 0 20px;padding-left:25px}.hcn-article-body li{margin:7px 0}.hcn-article-body strong{font-weight:850;color:#111827}.hcn-related{border-top:1px solid var(--line);margin-top:34px;padding-top:24px}.hcn-related h3{margin:0 0 12px}.hcn-related-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.hcn-related-list button{border:1px solid var(--line);background:#fff;border-radius:13px;padding:12px;text-align:left;cursor:pointer;color:#334155;font-weight:750}.hcn-related-list button:hover{border-color:#c4b5fd;color:var(--purple)}
.hcn-footer{margin-top:42px;padding:28px 5px 12px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;line-height:1.7}.hcn-footer-brand{font-weight:950;letter-spacing:.14em;margin-top:10px;color:#111827}.hcn-footer-links{margin-top:8px}.hcn-footer-links a{font-weight:700}
.hcn-popup{position:fixed;right:18px;bottom:18px;z-index:99999;width:min(410px,calc(100vw - 36px));padding:22px;border-radius:24px;background:rgba(255,255,255,.98);border:1px solid #e5e7eb;box-shadow:0 25px 80px rgba(0,0,0,.2);backdrop-filter:blur(12px);animation:hcnpop .28s ease-out}@keyframes hcnpop{from{opacity:0;transform:translateY(15px) scale(.98)}to{opacity:1;transform:none}}.hcn-popup-close{position:absolute;right:10px;top:8px;border:0;background:#f8fafc;width:30px;height:30px;border-radius:50%;font-size:21px;cursor:pointer}.hcn-popup-badge{font-size:10px;font-weight:950;letter-spacing:.16em;color:var(--purple)}.hcn-popup h3{font-size:20px;margin:7px 28px 7px 0}.hcn-popup p{font-size:12px;line-height:1.55;color:#475569;margin:0 0 10px}.hcn-popup input,.hcn-popup textarea{width:100%;box-sizing:border-box;margin:5px 0;padding:11px 12px;border:1px solid #dfe3ea;border-radius:11px;outline:0;background:#fff}.hcn-popup input:focus,.hcn-popup textarea:focus{border-color:#a78bfa;box-shadow:0 0 0 3px rgba(167,139,250,.12)}.hcn-stars{display:flex;gap:3px;margin:5px 0 8px}.hcn-stars button{border:0;background:none;font-size:28px;line-height:1;color:#cbd5e1;cursor:pointer;padding:2px}.hcn-stars button.selected{color:#f59e0b;text-shadow:0 2px 10px rgba(245,158,11,.2)}.hcn-submit{width:100%;border:0;border-radius:12px;padding:12px;background:linear-gradient(135deg,#111827,#312e81);color:#fff;font-weight:900;cursor:pointer}.hcn-feedback-status{font-size:12px;margin-top:7px;color:#64748b}
@media(max-width:950px){.hcn-list{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.muxapp-hcn{padding:9px}.hcn-hero{padding:38px 15px 32px;border-radius:24px}.hcn-hero h1{font-size:36px}.hcn-list{grid-template-columns:1fr}.hcn-card{min-height:190px}.hcn-article{border-radius:20px;padding:20px 16px}.hcn-related-list{grid-template-columns:1fr}.hcn-popup{right:10px;bottom:10px;width:calc(100vw - 20px);padding:18px}}

/* v2.1 article-first reading layout and isolated footer */
.hcn-results-area{margin-top:4px}.hcn-reading .hcn-hero{margin-bottom:14px}.hcn-article{position:relative;width:100%;max-width:none;margin:0 0 24px;overflow:visible}.hcn-article-body{max-width:100%;word-wrap:break-word;overflow-wrap:anywhere}.hcn-article-body img,.hcn-article-body video,.hcn-article-body iframe{max-width:100%;height:auto}.hcn-reading .hcn-results-area{display:none}.hcn-footer-shell{margin-top:38px;padding:10px;border:1px solid #e5e7eb;border-radius:28px;background:linear-gradient(135deg,#fbfbff,#f7fbff);box-shadow:0 18px 50px rgba(15,23,42,.07)}.hcn-footer-shell .hcn-footer{margin:0;border:1px solid rgba(255,255,255,.9);border-radius:20px;padding:26px 24px;background:#fff;box-shadow:inset 0 1px 0 rgba(255,255,255,.9)}.hcn-footer-shell .hcn-footer-brand{font-size:12px}.hcn-reading .hcn-article h2{margin-top:4px}.hcn-reading .hcn-article-body h3{scroll-margin-top:20px}
@media(max-width:600px){.hcn-footer-shell{padding:7px;border-radius:21px}.hcn-footer-shell .hcn-footer{border-radius:16px;padding:20px 16px}.hcn-article{margin-bottom:16px}}

/* v2.2 global feedback trigger */
.hcn-feedback-tab{position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:100000;border:0;border-radius:14px;padding:14px 10px;min-width:42px;min-height:92px;background:linear-gradient(180deg,#312e81,#6d28d9);color:#fff;font:800 11px/1 Inter,system-ui,sans-serif;letter-spacing:.04em;writing-mode:vertical-rl;text-orientation:mixed;box-shadow:0 8px 24px rgba(15,23,42,.22);cursor:pointer;transition:right .2s ease,box-shadow .2s ease,transform .2s ease}.hcn-feedback-tab:hover{box-shadow:0 12px 30px rgba(15,23,42,.3);transform:translateY(-50%) translateX(-2px)}
.hcn-popup[hidden]{display:none!important}.hcn-popup-open{display:block!important}.hcn-popup .hcn-submit:disabled{opacity:.65;cursor:wait}.hcn-popup{z-index:100001}
@media(max-width:600px){.hcn-feedback-tab{right:0;padding:12px 9px;min-width:40px;min-height:84px;font-size:10px;border-radius:12px}.hcn-popup{z-index:100001}}