/* farseev.com — AI news blog (hub + articles). Same tokens, fonts and components as index.html. */
:root{
  color-scheme:only light;
  --teal:#2DBF9C; --teal-bright:#3AD6B0; --teal-deep:#12775B; --teal-wash:#DFF4EE;
  --dark:#0C1413; --dark2:#121D1B; --card-d:#182422; --divider-d:#2A3733;
  --ink:#111E1B; --muted:#516059; --line:#D4DDDA; --mist:#F0F6F4; --white:#FFFFFF;
  --soft-d:#C3D0CC; --body-d:#DBE6E2;
  --maxw:1180px; --readw:740px;
  --font:'Montserrat','Noto Sans SC','Noto Sans TC','Noto Sans JP','Noto Sans KR','Noto Sans Thai','Noto Sans Devanagari','Noto Sans Arabic',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--white)}
body{font-family:var(--font);color:var(--ink);background:var(--white);line-height:1.62;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;position:relative;z-index:2}
.read{max-width:var(--readw);margin:0 auto;padding:0 28px}

/* wordmark */
.mark{font-weight:900;letter-spacing:-0.025em;white-space:nowrap;line-height:1}
.mark .a{color:var(--teal)}
.mark .b{color:#fff}

/* nav (same as home) */
header.nav{position:sticky;top:0;z-index:60;background:rgba(12,20,19,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--divider-d)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 28px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.nav .mark{font-size:19px}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{font-size:13px;font-weight:500;color:#C3D0CC;transition:color .16s;letter-spacing:.01em;white-space:nowrap}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--teal-bright)}
.nav-right{display:flex;align-items:center;gap:12px}
.lang-select{appearance:none;-webkit-appearance:none;background:transparent;color:#fff;border:1px solid var(--divider-d);border-radius:999px;padding:7px 30px 7px 13px;font-family:var(--font);font-size:12.5px;font-weight:600;cursor:pointer;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%233AD6B0' stroke-width='3'><path d='M6 9l6 6 6-6'/></svg>");background-repeat:no-repeat;background-position:right 10px center}
.lang-select:focus-visible{outline:2px solid var(--teal-bright);outline-offset:2px}
.lang-select option{color:#111;background:#fff}
.menu-btn{display:none;background:transparent;border:1px solid var(--divider-d);border-radius:9px;width:40px;height:38px;cursor:pointer;flex-direction:column;gap:4px;align-items:center;justify-content:center}
.menu-btn span{display:block;width:18px;height:2px;background:#fff}

/* type */
.eyebrow{font-weight:700;text-transform:uppercase;font-size:12px;letter-spacing:0.2em;color:var(--teal-deep);margin-bottom:18px;display:inline-block}
.on-dark .eyebrow{color:var(--teal-bright)}
.h-display{font-weight:800;font-size:clamp(1.95rem,4.4vw,3.15rem);line-height:1.07;letter-spacing:-0.02em;color:var(--dark)}
.on-dark .h-display{color:#fff}
.lead{font-size:clamp(1.02rem,1.35vw,1.16rem);color:#2f3d39;max-width:62ch;margin-top:18px}
.on-dark .lead{color:var(--body-d)}

/* buttons */
.btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:14px;padding:14px 24px;border-radius:999px;border:1.5px solid transparent;cursor:pointer;transition:all .18s ease;line-height:1}
.btn .arw{transition:transform .18s ease}
.btn:hover .arw{transform:translateX(3px)}
.btn-primary{background:var(--teal);color:#08110F;border-color:var(--teal)}
.btn-primary:hover{background:var(--teal-bright);border-color:var(--teal-bright)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--teal-deep);color:var(--teal-deep)}

/* hero bands */
.band{background:radial-gradient(120% 140% at 78% 0%,rgba(45,191,156,.16),transparent 55%),linear-gradient(180deg,var(--dark2),var(--dark));color:#fff;padding:64px 0 56px;border-bottom:1px solid var(--divider-d)}
.band .h-display{max-width:24ch}
.crumbs{font-size:12.5px;color:var(--soft-d);margin-bottom:22px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--teal-bright)}
.crumbs a:hover{color:var(--teal-bright)}
.byline{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;margin-top:24px;font-size:13.5px;color:var(--soft-d)}
.byline b{color:#fff;font-weight:700}
.byline .dot{width:4px;height:4px;border-radius:50%;background:var(--teal-bright)}
.newsline{margin-top:18px;display:inline-flex;gap:9px;align-items:center;border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:8px 16px;font-size:13px;color:#E7EFED;background:rgba(9,16,15,.35)}
.newsline .loc-dot{width:7px;height:7px;border-radius:50%;background:var(--teal-bright);box-shadow:0 0 0 4px rgba(58,214,176,.2);flex:0 0 auto}

/* article body */
.post{padding:54px 0 30px}
.post p,.post li{font-size:17px;line-height:1.75;color:#24312d}
.post p{margin:0 0 20px}
.post h2{font-size:clamp(1.35rem,2.4vw,1.7rem);font-weight:800;color:var(--dark);letter-spacing:-.01em;line-height:1.2;margin:42px 0 16px}
.post h3{font-size:1.15rem;font-weight:800;color:var(--dark);margin:28px 0 10px}
.post ul,.post ol{margin:0 0 22px 22px}
.post li{margin-bottom:8px}
.post a{color:var(--teal-deep);font-weight:600;border-bottom:1px solid rgba(18,119,91,.35)}
.post a:hover{border-bottom-color:var(--teal-deep)}
.post strong{color:var(--dark)}
.faq{margin-top:10px;display:grid;gap:12px}
.faq details{border:1px solid var(--line);border-radius:14px;padding:16px 20px;background:#fff}
.faq details[open]{border-color:var(--teal)}
.faq summary{cursor:pointer;font-weight:700;color:var(--dark);font-size:16px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--teal-deep);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:12px 0 0;font-size:15.5px}
.sources{background:var(--mist);border:1px solid var(--line);border-radius:16px;padding:22px 26px;margin-top:40px}
.sources h2{margin-top:0;font-size:1.15rem}
.sources ol{margin:0 0 0 20px}
.sources li{font-size:14px;line-height:1.55;margin-bottom:8px;color:var(--muted)}
.sources li a{font-weight:600}
.author{display:grid;grid-template-columns:64px 1fr;gap:18px;align-items:start;border-top:1px solid var(--line);margin-top:44px;padding-top:28px}
.author .av{width:64px;height:64px;border-radius:50%;background:var(--dark);color:var(--teal-bright);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:20px;letter-spacing:-.02em}
.author p{font-size:14.5px;line-height:1.6;margin:0 0 6px;color:var(--muted)}
.author p b{color:var(--dark)}
.author .links a{font-size:13.5px;margin-right:14px}

/* cards (hub, related, home strip) */
.section{padding:72px 0;position:relative;background-color:var(--white)}
.section--mist{background:var(--mist)}
.section-head{margin-bottom:36px;max-width:760px}
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.pcard{display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;transition:all .18s ease}
.pcard:hover{border-color:var(--teal);transform:translateY(-2px);box-shadow:0 12px 30px -18px rgba(18,119,91,.5)}
.pcard .meta{font-size:11.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--teal-deep)}
.pcard h2,.pcard h3{font-size:17px;font-weight:800;color:var(--dark);line-height:1.3;letter-spacing:-.01em;margin:0}
.pcard p{font-size:14px;color:var(--muted);line-height:1.55;margin:0}
.pcard .go{margin-top:auto;font-size:13px;font-weight:700;color:var(--teal-deep)}
.hub-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.related{border-top:1px solid var(--line);margin-top:20px}

/* footer (same as home) */
footer.foot{background:var(--dark);color:#fff;padding:56px 0 30px}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:34px;padding-bottom:38px;border-bottom:1px solid var(--divider-d)}
.foot .mark{font-size:25px}
.foot-tag{color:var(--body-d);font-size:14px;margin-top:15px;max-width:38ch;line-height:1.6}
.foot h6{font-size:11px;text-transform:uppercase;letter-spacing:.15em;color:var(--teal-bright);margin-bottom:15px;font-weight:700}
.foot ul{list-style:none;display:grid;gap:10px}
.foot ul a{font-size:14px;color:var(--body-d);transition:color .16s}
.foot ul a:hover{color:var(--teal-bright)}
.foot-bot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;padding-top:22px;color:var(--soft-d);font-size:12.5px}

@media(max-width:940px){.cards-3{grid-template-columns:1fr 1fr}.foot-top{grid-template-columns:1fr 1fr}}
@media(max-width:720px){
  .nav-links{position:absolute;top:64px;left:0;right:0;background:var(--dark);border-bottom:1px solid var(--divider-d);flex-direction:column;align-items:flex-start;gap:0;padding:8px 28px 16px;display:none}
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.06);font-size:15px}
  .menu-btn{display:flex}
  .cards-3,.hub-list,.foot-top{grid-template-columns:1fr}
  .band{padding:44px 0 40px}
  .post p,.post li{font-size:16px}
  .foot-bot{flex-direction:column}
}
@media(max-width:480px){.wrap,.read{padding:0 18px}.nav-inner{padding:0 15px;gap:10px}.nav .mark{font-size:16.5px}.lang-select{padding:6px 25px 6px 10px;font-size:11.5px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto !important}.pcard,.btn .arw{transition:none !important}}
[dir="rtl"] .crumbs li+li::before{content:"‹";margin:0 0 0 6px}
[dir="rtl"] .post ul,[dir="rtl"] .post ol,[dir="rtl"] .sources ol{margin:0 22px 22px 0}