/* Asian Neuro-Oncology Archive — editorial heritage system
   Palette: petrol-teal + warm coral + ivory paper. Display: Spectral. Body: IBM Plex Sans. */

:root{
  --teal:#1f6f78;
  --teal-dark:#143f45;
  --teal-deep:#0e2e33;
  --coral:#d9694f;
  --coral-dark:#b94f38;
  --gold:#bd9a3c;
  --ivory:#faf6ee;
  --paper:#fffdf8;
  --ink:#21302f;
  --ink-soft:#4d5b59;
  --line:#e3dccd;
  --shadow:0 14px 40px rgba(20,63,69,.12);
  --radius:4px;
  --measure:42rem;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ivory);
  color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  font-size:18px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal);text-decoration:none}
a:hover{color:var(--coral-dark);text-decoration:underline}

.container{width:100%;max-width:1140px;margin:0 auto;padding:0 1.4rem}

h1,h2,h3,h4{font-family:"Spectral",Georgia,serif;color:var(--teal-dark);line-height:1.18;font-weight:600;margin:0 0 .6em}
h1{font-size:clamp(2.1rem,4.6vw,3.25rem);letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,3vw,2rem);margin-top:1.8em}
h3{font-size:1.25rem;margin-top:1.4em}
p{margin:0 0 1.15em}

.skip{position:absolute;left:-999px;top:0;background:var(--coral);color:#fff;padding:.6rem 1rem;z-index:200}
.skip:focus{left:1rem;top:1rem}

/* ---------- Top bar / nav ---------- */
.topbar{background:var(--teal-deep);border-bottom:3px solid var(--coral);position:sticky;top:0;z-index:100}
.nav-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:64px}
.brand{display:flex;align-items:center;gap:.6rem;color:var(--ivory);font-family:"Spectral",serif;font-size:1.18rem;font-weight:600;letter-spacing:.01em}
.brand:hover{color:#fff;text-decoration:none}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;background:var(--coral);color:#fff;border-radius:6px;font-weight:700;font-size:1.1rem;flex:0 0 auto}
.brand-text em{font-style:italic;color:var(--gold);font-weight:500}
.brand-foot .brand-mark{background:var(--teal)}
.nav-toggle{display:none;background:transparent;border:1px solid rgba(255,255,255,.35);color:var(--ivory);font-size:1.25rem;line-height:1;padding:.35rem .7rem;border-radius:6px;cursor:pointer}
.nav-toggle .burger{display:block}
.navmenu{list-style:none;display:flex;flex-wrap:wrap;gap:.2rem;margin:0;padding:0}
.nav-link{display:block;color:#d7e7e6;padding:.45rem .7rem;border-radius:6px;font-size:.93rem;font-weight:500;letter-spacing:.01em}
.nav-link:hover{background:rgba(255,255,255,.08);color:#fff;text-decoration:none}
.nav-link.active{color:#fff;background:var(--teal)}

/* ---------- Home hero ---------- */
.hero{position:relative;color:var(--ivory);overflow:hidden;background:var(--teal-deep)}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.34}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(14,46,51,.92),rgba(14,46,51,.55) 60%,rgba(217,105,79,.28))}
.hero-inner{position:relative;z-index:2;max-width:760px;margin:0 auto;padding:5.5rem 1.4rem 5rem;text-align:center}
.eyebrow{text-transform:uppercase;letter-spacing:.22em;font-size:.74rem;font-weight:600;color:var(--gold);margin:0 0 1rem}
.hero h1{color:#fff;margin:0 0 .5em}
.hero-sub{font-size:1.18rem;color:#e7efee;max-width:40rem;margin:0 auto 1.8rem}
.hero-cta{margin:0}
.btn{display:inline-block;background:var(--coral);color:#fff;padding:.78rem 1.5rem;border-radius:var(--radius);font-weight:600;font-size:.97rem;letter-spacing:.01em;border:1px solid var(--coral)}
.btn:hover{background:var(--coral-dark);border-color:var(--coral-dark);color:#fff;text-decoration:none}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ---------- Breadcrumb band ---------- */
.crumb-band{background:var(--teal-dark);color:#cfe0df;padding:.7rem 0}
.breadcrumb{font-size:.85rem;letter-spacing:.02em}
.breadcrumb a{color:#bfe6e2}
.breadcrumb span[aria-current]{color:#fff}
.breadcrumb span[aria-hidden]{margin:0 .5rem;color:#6f8f8c}

/* ---------- Main / prose ---------- */
main{padding:3rem 0 4rem;background:
  radial-gradient(1200px 320px at 50% -120px, rgba(31,111,120,.06), transparent 70%)}
.prose{max-width:var(--measure);margin:0 auto;background:var(--paper);padding:2.6rem clamp(1.2rem,4vw,3rem);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}
.home-prose{max-width:50rem}
.prose h1{margin-top:0}
.prose .lead{font-size:1.24rem;line-height:1.6;color:var(--teal-dark);font-family:"Spectral",serif;font-weight:500;margin-bottom:1.4em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em}
.prose li{margin:.4em 0}
.prose h2{position:relative;padding-bottom:.25em}
.prose h2::after{content:"";position:absolute;left:0;bottom:0;width:48px;height:3px;background:var(--coral);border-radius:2px}
.prose strong{color:var(--teal-dark)}
.prose a{border-bottom:1px solid rgba(31,111,120,.3)}
.prose a:hover{border-bottom-color:var(--coral)}

.page-hero{margin:0 auto 2rem;max-width:1140px}
.page-hero img{width:100%;max-height:440px;object-fit:cover;border-radius:8px;box-shadow:var(--shadow)}

/* notice / disclaimer box */
.notice{background:#f3efe3;border-left:4px solid var(--gold);padding:1rem 1.2rem;border-radius:0 6px 6px 0;font-size:.95rem;color:var(--ink-soft);margin:0 0 1.4em}
.notice strong{color:var(--teal-dark)}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.2rem;margin:1.6em 0}
.gallery figure{margin:0;background:var(--ivory);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.gallery img{width:100%;height:190px;object-fit:cover}
.gallery figcaption{padding:.7rem .9rem;font-size:.85rem;color:var(--ink-soft)}

/* contact form */
.contact-form{display:flex;flex-direction:column;gap:.9rem;margin:1.4em 0;background:var(--ivory);padding:1.4rem;border:1px solid var(--line);border-radius:8px}
.contact-form label{display:flex;flex-direction:column;gap:.3rem;font-size:.85rem;font-weight:600;color:var(--teal-dark)}
.contact-form input,.contact-form textarea{font:inherit;font-size:.95rem;font-weight:400;padding:.7rem .8rem;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink)}
.contact-form input:focus,.contact-form textarea:focus{outline:2px solid var(--teal);border-color:var(--teal)}
.contact-form button{align-self:flex-start;background:var(--teal);color:#fff;border:0;padding:.75rem 1.6rem;border-radius:var(--radius);font-weight:600;font-size:.97rem;cursor:pointer}
.contact-form button:hover{background:var(--teal-dark)}

/* ---------- Footer ---------- */
.site-footer{background:var(--teal-deep);color:#c4d6d4;padding:3rem 0 1.5rem;font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:2rem}
.site-footer h3{color:#fff;font-size:.8rem;text-transform:uppercase;letter-spacing:.14em;margin:0 0 .9em}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:.4em 0}
.site-footer a{color:#bcd4d1}
.site-footer a:hover{color:#fff}
.foot-about p{color:#9fb8b5;margin:.8em 0 0;font-size:.86rem;line-height:1.6}
.brand-foot{margin-bottom:.4rem}
.foot-base{margin-top:2.4rem;padding-top:1.2rem;border-top:1px solid rgba(255,255,255,.12)}
.foot-base p{margin:0;color:#8aa6a3;font-size:.82rem}

/* ---------- Responsive ---------- */
@media(max-width:920px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  body{font-size:17px}
  .nav-toggle{display:inline-block}
  .navmenu{display:none;position:absolute;left:0;right:0;top:100%;background:var(--teal-deep);flex-direction:column;gap:0;padding:.5rem .8rem 1rem;border-bottom:3px solid var(--coral)}
  .navmenu.open{display:flex}
  .nav-row{position:relative}
  .nav-link{padding:.7rem .6rem;font-size:1rem}
  .hero-inner{padding:3.5rem 1.2rem}
  .footer-grid{grid-template-columns:1fr;gap:1.6rem}
}