/* ===========================================================
   Berezovski Lab — shared styles
   Palette taken from the lab logo: navy #001B3C + crimson #C20A48
   =========================================================== */
:root{
  --navy:#001B3C;
  --navy-2:#0A2A52;
  --crimson:#C20A48;
  --crimson-deep:#9E0A3B;
  --ink:#17263A;
  --muted:#5C6B7D;
  --bg:#FFFFFF;
  --bg-alt:#F5F7FA;
  --line:#E4E9F0;
  --radius:12px;
  --display:'Poppins',-apple-system,Segoe UI,Roboto,sans-serif;
  --body:'Inter',-apple-system,Segoe UI,Roboto,sans-serif;
  --maxw:1080px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;font-family:var(--body);color:var(--ink);background:var(--bg);
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--crimson-deep);}
h1,h2,h3,h4{font-family:var(--display);color:var(--navy);line-height:1.2;margin:0;font-weight:600;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:16px;}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;}
.brand img{height:42px;width:auto;}
.brand .bw{font-family:var(--display);font-weight:700;font-size:1.34rem;letter-spacing:-.01em;line-height:1;white-space:nowrap;}
.brand .bw .n{color:var(--navy);}
.brand .bw .l{color:var(--crimson);}
.brand .bw small{display:block;font-family:var(--body);font-weight:500;font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-top:3px;}
.nav{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0;}
.nav a{display:block;text-decoration:none;color:var(--ink);font-size:.92rem;font-weight:500;padding:9px 13px;border-radius:8px;transition:.15s;}
.nav a:hover{background:var(--bg-alt);color:var(--navy);}
.nav a.active{color:var(--crimson);}
.nav a.active::after{content:"";display:block;height:2px;background:var(--crimson);border-radius:2px;margin-top:5px;}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;width:44px;height:40px;cursor:pointer;align-items:center;justify-content:center;}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:"";display:block;width:20px;height:2px;background:var(--navy);position:relative;}
.nav-toggle span::before{position:absolute;top:-6px;}
.nav-toggle span::after{position:absolute;top:6px;}

/* ---------- Page hero ---------- */
.page-hero{background:var(--navy);color:#fff;padding:46px 0;}
.page-hero h1{color:#fff;font-size:2rem;}
.page-hero p{margin:.5rem 0 0;color:#AEC0D6;font-size:1.02rem;}

/* ---------- Home hero ---------- */
.home-hero{background:var(--bg-alt);color:var(--ink);padding:58px 0 52px;text-align:center;border-bottom:1px solid var(--line);}
.home-hero img.logo-lg{height:148px;margin:0 auto 20px;}
.home-hero h1{color:var(--navy);font-size:2.4rem;letter-spacing:-.01em;}
.home-hero .tag{color:var(--muted);font-size:1.06rem;margin:14px auto 0;max-width:60ch;}
.home-hero .at{font-family:var(--display);color:var(--crimson);font-weight:600;letter-spacing:.02em;margin-top:6px;}

/* ---------- Sections ---------- */
.section{padding:60px 0;}
.section.alt{background:var(--bg-alt);}
.section h2{font-size:1.7rem;margin-bottom:8px;}
.section .lead{color:var(--muted);margin:0 0 28px;}
.eyebrow{font-size:.74rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--crimson);margin-bottom:10px;}
.prose p{margin:0 0 18px;}
.prose h3{font-size:1.22rem;margin:30px 0 10px;}
.prose h3 .num{color:var(--crimson);margin-right:8px;}
.prose .ref{color:var(--muted);font-style:italic;}

/* ---------- Recruit cards ---------- */
.cards-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.recruit{background:var(--bg);border:1px solid var(--line);border-left:4px solid var(--crimson);border-radius:var(--radius);padding:26px;}
.recruit h3{font-size:1.2rem;margin-bottom:6px;}
.recruit .tag{display:inline-block;font-size:.68rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:#fff;background:var(--crimson);padding:3px 9px;border-radius:5px;margin-bottom:10px;}
.recruit p{margin:0 0 14px;font-size:.96rem;}

/* ---------- Research interests ---------- */
.interests{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.interest{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:24px;}
.interest .k{font-family:var(--display);font-weight:600;color:var(--navy);font-size:1.05rem;margin-bottom:8px;}
.interest .k span{color:var(--crimson);}
.interest p{margin:0;font-size:.92rem;color:var(--muted);}

/* ---------- News ---------- */
.news{display:flex;flex-direction:column;gap:0;}
.news-item{padding:18px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:120px 1fr;gap:18px;}
.news-item .when{font-family:var(--display);font-weight:600;color:var(--crimson);font-size:.86rem;}
.news-item p{margin:0;font-size:.96rem;}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:600;font-size:.93rem;padding:11px 20px;border-radius:9px;transition:.18s;font-family:var(--display);}
.btn-primary{background:var(--crimson);color:#fff;}
.btn-primary:hover{background:var(--crimson-deep);}
.btn-navy{background:var(--navy);color:#fff;}
.btn-navy:hover{background:var(--navy-2);}
.btn-ghost{border:1px solid var(--line);color:var(--navy);background:#fff;}
.btn-ghost:hover{border-color:var(--navy);}

/* ---------- PI / about ---------- */
.about-grid{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start;}
.pi-photo{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);}
.pi-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.pi-links a{font-size:.82rem;text-decoration:none;color:var(--navy);border:1px solid var(--line);border-radius:7px;padding:7px 12px;transition:.15s;}
.pi-links a:hover{background:var(--navy);color:#fff;border-color:var(--navy);}
.cv-block{margin-bottom:26px;}
.cv-block h3{font-size:1rem;text-transform:uppercase;letter-spacing:.08em;color:var(--crimson);margin-bottom:10px;}
.cv-row{display:grid;grid-template-columns:130px 1fr;gap:16px;padding:9px 0;border-top:1px solid var(--line);font-size:.95rem;}
.cv-row .yr{font-weight:600;color:var(--navy);}

/* ---------- Team ---------- */
.member-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px;}
.member{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:20px;}
.member .avatar{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--display);font-weight:600;font-size:1.4rem;color:#fff;background:var(--navy);margin-bottom:12px;overflow:hidden;}
.member .avatar img{width:100%;height:100%;object-fit:cover;object-position:center top;}
.member.lead .avatar{background:var(--crimson);}
.member .mname{font-family:var(--display);font-weight:600;color:var(--navy);}
.member .mrole{color:var(--crimson);font-size:.85rem;font-weight:500;margin:2px 0 8px;}
.member .mdet{font-size:.82rem;color:var(--muted);}
.member .mdet a{color:var(--navy);text-decoration:none;}
.subhead{font-family:var(--display);font-weight:600;color:var(--navy);font-size:1.15rem;margin:38px 0 14px;padding-bottom:8px;border-bottom:2px solid var(--crimson);}
.former{list-style:none;margin:0;padding:0;}
.former li{padding:8px 0;border-bottom:1px solid var(--line);font-size:.92rem;}
.former li b{color:var(--navy);font-family:var(--display);}
.former li .yr{color:var(--crimson);font-weight:600;font-size:.82rem;margin-left:4px;}

/* ---------- Publications ---------- */
.pub-list{list-style:none;margin:0;padding:0;counter-reset:none;}
.pub-list li{padding:14px 0;border-bottom:1px solid var(--line);font-size:.93rem;display:grid;grid-template-columns:34px 1fr;gap:12px;}
.pub-list li .pn{font-family:var(--display);font-weight:600;color:var(--crimson);font-size:.84rem;}
.pub-list li .pv{color:var(--muted);font-style:italic;}
.pub-list li a{color:var(--navy);font-weight:500;text-decoration:none;}
.pub-list li a:hover{text-decoration:underline;}
.badge{display:inline-block;font-size:.66rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:#fff;background:var(--crimson);padding:2px 7px;border-radius:4px;margin-left:6px;vertical-align:1px;}

/* ---------- Equipment ---------- */
.equip{margin-bottom:30px;}
.equip h3{font-size:1.18rem;margin-bottom:8px;}
.equip .cat{font-size:.74rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--crimson);margin:34px 0 14px;}
.equip ul{margin:8px 0 0;padding-left:20px;}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start;}
.contact-info .row{display:grid;grid-template-columns:110px 1fr;gap:14px;padding:13px 0;border-top:1px solid var(--line);font-size:.96rem;}
.contact-info .row:last-child{border-bottom:1px solid var(--line);}
.contact-info .k{font-weight:600;color:var(--crimson);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;padding-top:2px;}
.contact-info a{color:var(--navy);}
.map-embed{border:0;width:100%;height:340px;border-radius:var(--radius);}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:#AEC0D6;padding:40px 0 30px;margin-top:10px;}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;}
.site-footer .brand .bw .n{color:#fff;}
.site-footer .fnav{display:flex;flex-wrap:wrap;gap:14px;list-style:none;margin:0;padding:0;}
.site-footer .fnav a{color:#AEC0D6;text-decoration:none;font-size:.86rem;}
.site-footer .fnav a:hover{color:#fff;}
.site-footer .copy{font-size:.8rem;color:#7E93AC;margin-top:18px;text-align:center;width:100%;border-top:1px solid rgba(255,255,255,.1);padding-top:18px;}

/* ---------- Responsive ---------- */
@media(max-width:860px){
  .nav{position:fixed;inset:74px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 24px 16px;transform:translateY(-10px);opacity:0;pointer-events:none;transition:.2s;}
  .nav.open{transform:none;opacity:1;pointer-events:auto;}
  .nav a{padding:13px 6px;border-radius:0;border-bottom:1px solid var(--line);}
  .nav a.active::after{display:none;}
  .nav-toggle{display:inline-flex;}
  .cards-2,.interests,.about-grid,.contact-grid{grid-template-columns:1fr;}
  .home-hero h1{font-size:2rem;}
  .news-item{grid-template-columns:1fr;gap:4px;}
  .cv-row{grid-template-columns:100px 1fr;}
}