/* ============================================================
   MSL — Materials Science Research Group, CUET
   Custom stylesheet · v1.0 · No frameworks
   ============================================================ */
:root{
  --navy:#0a1931;
  --navy-2:#10254e;
  --ink:#1a2332;
  --muted:#5b6b82;
  --line:#e4e9f1;
  --bg:#f6f8fc;
  --card:#ffffff;
  --teal:#00b69b;
  --teal-dark:#009580;
  --gold:#ffb703;
  --gold-soft:#fff6e0;
  --radius:14px;
  --shadow:0 10px 30px rgba(10,25,49,.08);
  --shadow-lg:0 24px 60px rgba(10,25,49,.14);
  --font:"Inter","Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:"Georgia","Times New Roman",serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
img{max-width:100%;display:block}
a{color:var(--navy-2);text-decoration:none}
a:hover{color:var(--teal-dark)}
.container{width:min(1180px,92%);margin:0 auto}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--gold);padding:8px 14px;z-index:200;border-radius:0 0 8px 0}
.skip-link:focus{left:0}


/* ---------- QUILLJS ---------- */
.ql-container.ql-snow { border: none; }
.ql-container p { font-size: 1rem; }

/* ---------- Topbar ---------- */
.topbar{background:var(--navy);color:#cdd8ea;font-size:13.5px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;padding:8px 0;gap:12px;flex-wrap:wrap}
.topbar a{color:#fff}
.topbar .dot{opacity:.4;margin:0 8px}

/* ---------- Header / Nav ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.navbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
.brand{display:flex;align-items:center;gap:12px}
.brand-text b{display:block;font-size:17px;line-height:1.15;color:var(--navy)}
.brand-text span{font-size:12.5px;color:var(--muted);letter-spacing:.2px}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-links>li{position:relative}
.nav-links a.nav-link{display:block;padding:10px 13px;border-radius:9px;font-weight:600;font-size:14.5px;color:var(--ink)}
.nav-links a.nav-link:hover,.nav-links a.nav-link.active{background:#eef3fb;color:var(--navy)}
.has-dropdown .dropdown{position:absolute;top:calc(70% + 8px);left:0;min-width:260px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);padding:8px;list-style:none;margin:0;display:none}
.has-dropdown:hover .dropdown,.has-dropdown:focus-within .dropdown{display:block}
.dropdown a{display:block;padding:9px 12px;border-radius:8px;font-size:14px;font-weight:500}
.dropdown a:hover{background:#f1f6ff}
.caret{font-size:11px;margin-left:4px}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;cursor:pointer;font-weight:700;border-radius:10px;padding:12px 20px;font-size:15px;transition:transform .15s ease,box-shadow .15s ease}
.btn-primary{background:var(--navy);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{background:var(--navy-2);color:#fff;transform:translateY(-1px)}
.btn-teal{background:var(--teal);color:#fff}
.btn-teal:hover{background:var(--teal-dark);color:#fff}
.btn-ghost{background:#fff;border:1.5px solid var(--line);color:var(--navy)}
.btn-sm{padding:8px 14px;font-size:13.5px}
.hamburger{display:none;background:#fff;border:1.5px solid var(--line);border-radius:10px;font-size:20px;padding:7px 12px;cursor:pointer}

/* ---------- Hero ---------- */
.hero{background:radial-gradient(900px 420px at 85% -10%,rgba(0,182,155,.22),transparent 60%),radial-gradient(700px 380px at 5% 10%,rgba(255,183,3,.18),transparent 60%),linear-gradient(180deg,#0a1931 0%,#122c5e 100%);color:#fff;overflow:hidden;position:relative}
.hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center;padding:64px 0 56px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);padding:7px 13px;border-radius:100px;font-size:13px;font-weight:600;letter-spacing:.3px}
.eyebrow i{width:8px;height:8px;border-radius:50%;background:var(--gold);display:inline-block;animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{font-size:clamp(32px,4.6vw,54px);line-height:1.08;margin:18px 0 12px;font-weight:800;letter-spacing:-.5px}
.hero h1 .accent{color:var(--gold)}
.hero p.lead{color:#d3ddf0;font-size:17.5px;max-width:60ch}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.hero-stats{display:flex;gap:26px;flex-wrap:wrap;margin-top:28px}
.hstat b{font-size:26px;display:block}
.hstat span{font-size:13px;color:#b9c6de}
.hero-card{background:rgba(255,255,255,.97);color:var(--ink);border-radius:18px;padding:24px;box-shadow:var(--shadow-lg)}
.hero-card h3{margin:0 0 6px;font-size:19px;color:var(--navy)}
.hero-card .pi{display:flex;gap:14px;align-items:center;margin:14px 0;padding:12px;border:1px solid var(--line);border-radius:12px;background:#f8faff}
.avatar{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--navy),var(--teal));color:#fff;display:grid;place-items:center;font-weight:800;font-size:20px;flex-shrink:0}
.hero-card ul.tick{list-style:none;margin:14px 0 0;padding:0;font-size:14.5px}
.hero-card ul.tick li{padding:7px 0 7px 28px;position:relative;border-top:1px dashed var(--line)}
.hero-card ul.tick li::before{content:"✓";position:absolute;left:4px;top:7px;color:var(--teal);font-weight:800}
.page-hero{background:linear-gradient(180deg,var(--navy),var(--navy-2));color:#fff;padding:46px 0 40px}
.page-hero h1{margin:0;font-size:clamp(26px,3.4vw,38px)}
.page-hero p{color:#c6d2e8;margin:8px 0 0}
.breadcrumb{font-size:13.5px;margin-bottom:10px}
.breadcrumb a{}

/* ---------- Sections / cards ---------- */
.section{padding:56px 0}
.section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:26px}
.kicker{color:var(--teal-dark);font-weight:800;font-size:13px;letter-spacing:1.4px;text-transform:uppercase}
.section-head h2{margin:6px 0 8px;font-size:clamp(24px,3vw,33px);color:var(--navy);letter-spacing:-.3px}
.section-head p{color:var(--muted);margin:0}
.grid{display:grid;gap:18px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card .icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:22px;background:#eef6f4;margin-bottom:12px}
.card h3{margin:0 0 8px;font-size:18px;color:var(--navy)}
.card p{margin:0 0 12px;color:var(--muted);font-size:15px}
.tag{display:inline-block;font-size:12px;font-weight:700;padding:4px 10px;border-radius:100px;background:#eef3fb;color:var(--navy-2);margin:0 6px 6px 0}
.tag.teal{background:#e2f7f2;color:#04685a}
.tag.gold{background:var(--gold-soft);color:#8a5f00}
.link-more{font-weight:700;font-size:14.5px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.notice{background:var(--gold-soft);border:1px solid #f0d48a;border-radius:12px;padding:14px 16px;font-size:14.5px}
.members-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.research-grid{max-width:920px;margin:0 auto}
.research-thumb{display:block;margin:-22px -22px 16px;border-radius:var(--radius) var(--radius) 0 0;overflow:hidden}
.research-thumb img{width:100%;height:200px;object-fit:cover}
.member{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.member-photo{width:100%;aspect-ratio:1/1;background:linear-gradient(135deg,#dfe8f7,#c9f2e9);display:grid;place-items:center;font-size:44px;font-weight:800;color:var(--navy-2);overflow:hidden}
img.member-photo{display:block;width:100%;height:auto;aspect-ratio:1/1;padding:0;object-fit:cover;object-position:center center}
.member-body{padding:16px;text-align:center}
.member-body b{color:var(--navy)}
.member-body small{color:var(--muted);display:block;margin:2px 0 4px}
.member-body small:last-of-type{margin-bottom:10px}
.member-links{margin:20px 0;display:flex;gap:8px;flex-wrap:wrap;justify-content:start;}
.chip{font-size:12.5px;font-weight:700;border:1px solid var(--line);border-radius:100px;padding:5px 11px;background:#f8faff}
.chip:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
table.table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);font-size:14.5px}
table.table th{background:var(--navy);color:#fff;text-align:left;padding:12px 14px}
table.table td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
table.table tr:last-child td{border-bottom:0}
.facility{display:grid;grid-template-columns:220px 1fr;gap:20px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow);align-items:start}
.facility-thumb{height:150px;border-radius:10px;background:linear-gradient(135deg,#e8eefb,#d7f3ec);display:grid;place-items:center;font-size:40px}
.facility h3{margin:0 0 6px;color:var(--navy)}
.facility-list{display:grid}
.facility-row{display:grid;grid-template-columns:40% 1fr;gap:22px;align-items:start;margin:1rem 0}
.facility-row-noimg{grid-template-columns:1fr}
.facility-title{margin:0 0 10px;font-size:21px;color:var(--navy)}
.facility-figure{margin:0}
.facility-figure img{width:100%;height:220px;object-fit:cover;border-radius:10px}
.facility-figure figcaption{font-size:12.5px;color:var(--muted);margin-top:6px;line-height:1.5}
.spec{font-size:14px;color:var(--muted)}
.pub-toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.pub-toolbar input,.pub-toolbar select{padding:11px 13px;border:1.5px solid var(--line);border-radius:10px;font-size:14.5px;background:#fff;min-width:220px}
.pub-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.pub{background:#fff;border:1px solid var(--line);border-left:5px solid var(--teal);border-radius:12px;padding:16px 18px;box-shadow:var(--shadow)}
.pub b{color:var(--navy)}
.pub small{color:var(--muted)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form label{display:block;font-weight:700;font-size:14px;margin:12px 0 6px}
.form input,.form textarea{width:100%;padding:12px 13px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit}
.form textarea{min-height:130px;resize:vertical}
.form .error{color:#b00020;font-size:13px;display:none}

/* ---------- Footer ---------- */
footer{background:var(--navy);color:#c8d3e8;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:26px;padding:44px 0 26px}
footer h4{color:#fff;margin:0 0 12px;font-size:15px;letter-spacing:.4px}
footer ul{list-style:none;margin:0;padding:0;font-size:14px}
footer li{margin:7px 0}
footer a{color:#c8d3e8}
footer a:hover{color:var(--gold)}
.copyright{border-top:1px solid rgba(255,255,255,.14);padding:14px 0;font-size:13px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
#backTop{position:fixed;right:18px;bottom:18px;width:46px;height:46px;border-radius:50%;border:0;background:var(--navy);color:#fff;font-size:20px;cursor:pointer;display:none;box-shadow:var(--shadow-lg)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}

/* ---------- Home hero : image | content | image ---------- */
.hero .hero-3col{display:grid;grid-template-columns:300px 1fr 300px;gap:28px;align-items:center;padding:48px 0}
.hero .hero-3col.hero-layout-l{grid-template-columns:300px 1fr}
.hero .hero-3col.hero-layout-r{grid-template-columns:1fr 300px}
.hero .hero-3col.hero-layout-none{display:block;text-align:center}
.hero-center{text-align:center}
.hero-center h1{margin:0 0 10px}
.hero-center .lead{margin:0 auto}
.hero-img{width:100%;height:300px;object-fit:cover;border-radius:14px;border:1px solid rgba(255,255,255,.25);box-shadow:var(--shadow-lg)}

/* ---------- Welcome : ticker on top, 70/30 below ---------- */
.ticker{display:flex;align-items:center;gap:0;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);overflow:hidden;margin-bottom:20px}
.ticker-label{background:var(--navy);color:#fff;font-weight:800;font-size:13px;letter-spacing:1px;text-transform:uppercase;padding:12px 16px;flex-shrink:0}
.ticker-viewport{overflow:hidden;flex:1;white-space:nowrap}
.ticker-track{display:inline-block;padding:12px 0;animation:ticker-scroll 28s linear infinite;font-size:14.5px;font-weight:500;color:var(--ink)}
.ticker-viewport:hover .ticker-track{animation-play-state:paused}
.ticker-sep{color:var(--teal);margin:0 14px;font-size:11px}
@keyframes ticker-scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.welcome-grid{display:grid;grid-template-columns:7fr 3fr;gap:20px;align-items:start}
.welcome-main p{margin:0 0 14px}
.welcome-main p:last-child{margin-bottom:0}
.welcome-side h2{margin:0 0 12px;font-size:19px;color:var(--navy)}
.welcome-side ul{list-style:none;margin:0;padding:0}
.welcome-side li{padding:10px 0;border-top:1px solid var(--line);font-size:14.5px}
.welcome-side li:first-child{border-top:0}
.welcome-side small{display:block;color:var(--teal-dark);font-weight:700;font-size:12.5px}
.latest-link{color:var(--ink);font-weight:500}
.latest-link:hover{color:var(--teal-dark)}
.ticker-item{color:var(--ink);font-weight:500}
.ticker-item:hover{color:var(--teal-dark)}
.all-posts-btn{margin-top:14px;width:100%;justify-content:center}

/* ---------- Posts (frontend) ---------- */
.post-list{display:grid;gap:16px}
.post-card{display:grid;grid-template-columns:220px 1fr;gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.post-thumb{display:block;min-height:160px;background:linear-gradient(135deg,#e8eefb,#d7f3ec)}
.post-thumb img{width:100%;height:100%;min-height:160px;max-height:240px;object-fit:cover}
.post-body{padding:20px 22px}
.post-meta{font-size:12.5px;font-weight:700;color:var(--teal-dark);margin-bottom:6px}
.post-title{margin:0 0 8px;font-size:20px;color:var(--navy)}
.post-title a{color:var(--navy)}
.post-title a:hover{color:var(--teal-dark)}
.post-excerpt{color:var(--muted);font-size:15px;margin:0 0 12px}
.pager{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:22px}
.pager-info{font-size:14px;color:var(--muted);font-weight:600}
.post-single-grid{display:grid;grid-template-columns:7fr 3fr;gap:20px;align-items:start;margin-top:18px}
.post-featured{width:100%;max-height:420px;object-fit:cover;border-radius:10px;margin-bottom:6px}
.post-caption{font-size:13px;color:var(--muted);margin-bottom:14px}
.post-content img{max-width:100%;border-radius:8px}
.post-side h2{margin:0 0 12px;font-size:19px;color:var(--navy)}
.post-side ul{list-style:none;margin:0;padding:0}
.post-side li{padding:10px 0;border-top:1px solid var(--line);font-size:14.5px}
.post-side li:first-child{border-top:0}
.post-side small{display:block;color:var(--teal-dark);font-weight:700;font-size:12.5px}

/* ---------- Research single ---------- */
.research-single-grid{display:grid;grid-template-columns:7fr 3fr;gap:20px;align-items:start;margin-top:18px}
.mini-list{list-style:none;margin:0;padding:0}
.mini-list li{padding:7px 0;border-top:1px solid var(--line);font-size:13.5px;line-height:1.45}
.mini-list li:first-child{border-top:0}
.mini-list a{color:var(--ink);font-weight:500}
.mini-list a:hover{color:var(--teal-dark)}

/* ---------- Responsive ---------- */
@media(max-width:1000px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .members-grid{grid-template-columns:repeat(2,1fr)}
  .hero .container{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .split,.contact-grid{grid-template-columns:1fr}
  .welcome-grid,.post-single-grid,.research-single-grid{grid-template-columns:1fr}
  .post-card{grid-template-columns:1fr}
  .hero .hero-3col{grid-template-columns:1fr;padding:36px 0}
  .hero .hero-3col.hero-layout-l,.hero .hero-3col.hero-layout-r{grid-template-columns:1fr}
  .hero-img{height:220px}
  .hero-center{order:-1}
  .facility{grid-template-columns:1fr}
  .facility-row{grid-template-columns:1fr}
}
@media(max-width:760px){
  .hamburger{display:block}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg)}
  .nav-links.open{display:flex}
  .has-dropdown .dropdown{position:static;box-shadow:none;border:0;display:none;padding:0 0 0 12px}
  .has-dropdown.expanded .dropdown{display:block}
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr}
  .members-grid{grid-template-columns:1fr}
  .navbar .btn{display:none}
}