*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f4f6fb;--bg2:#eaf0fa;--surface:#fff;--surface2:#e8eef8;
  --cyan:#0077cc;--cyan-dim:#0066b3;--violet:#6d28d9;--violet-bright:#7c3aed;
  --magenta:#c026d3;--teal:#0d9488;--white:#0f1729;--muted:#5a6a88;
  --border:rgba(109,40,217,.13);--heading:'Syne',sans-serif;--body:'Inter',sans-serif;
  --nav-bg:rgba(244,246,251,.92);--hero-grad1:rgba(109,40,217,.08);
  --hero-grad2:rgba(0,119,204,.07);--hero-grid:rgba(109,40,217,.04);
  --footer-bg:#e2e8f4;--footer-color:rgba(90,106,136,.7);--scrollbar-track:#f0f3fa;
}
html.dark{
  --bg:#04080f;--bg2:#080e1a;--surface:#0d1525;--surface2:#111c30;
  --cyan:#00e5ff;--cyan-dim:#00b8cc;--violet:#7c3aed;--violet-bright:#a855f7;
  --magenta:#e040fb;--teal:#00bfa5;--white:#f0f4ff;--muted:#8899bb;
  --border:rgba(0,229,255,.12);--nav-bg:rgba(4,8,15,.88);
  --hero-grad1:rgba(124,58,237,.18);--hero-grad2:rgba(0,229,255,.1);
  --hero-grid:rgba(0,229,255,.03);--footer-bg:#020408;
  --footer-color:rgba(136,153,187,.5);--scrollbar-track:#04080f;
}
html{scroll-behavior:smooth}
body{font-family:var(--body);background:var(--bg);color:var(--white);font-size:15px;line-height:1.7;overflow-x:hidden;transition:background .3s,color .3s}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--violet);border-radius:10px}

/* NAV */
nav{position:sticky;top:0;z-index:200;background:var(--nav-bg);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:background .3s}
.nav-inner{max-width:1140px;margin:0 auto;padding:0 1.5rem;display:flex;align-items:center;justify-content:space-between;height:64px;gap:1rem}
.nav-logo{cursor:pointer;display:flex;align-items:center;gap:.7rem;flex-shrink:0}
.nav-logo-badge{width:38px;height:38px;border-radius:10px;overflow:hidden;background:linear-gradient(135deg,var(--violet),var(--cyan));display:flex;align-items:center;justify-content:center;flex-shrink:0}
.nav-logo-badge img{width:100%;height:100%;object-fit:cover}
.nav-logo-badge span{font-family:var(--heading);font-weight:800;font-size:.85rem;color:#fff}
.nav-logo-main{font-family:var(--heading);font-weight:700;font-size:.9rem;color:var(--white);line-height:1.1}
.nav-logo-sub{font-size:.65rem;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.nav-links{display:flex;list-style:none}
.nav-links button{background:none;border:none;color:var(--muted);font-size:.73rem;font-weight:500;letter-spacing:.05em;text-transform:uppercase;cursor:pointer;font-family:var(--body);padding:0 .7rem;height:64px;transition:color .2s;position:relative}
.nav-links button::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:linear-gradient(90deg,var(--violet),var(--cyan));transition:width .3s;border-radius:2px}
.nav-links button:hover,.nav-links button.active{color:var(--cyan)}
.nav-links button.active::after{width:60%}
.nav-actions{display:flex;align-items:center;gap:.5rem;flex-shrink:0}
.nav-admin-btn{background:rgba(124,58,237,.15);border:1px solid rgba(124,58,237,.4);color:var(--violet-bright);font-size:.72rem;padding:.35rem .9rem;cursor:pointer;font-family:var(--body);letter-spacing:.06em;text-transform:uppercase;border-radius:6px;transition:all .2s}
.nav-admin-btn:hover{background:rgba(124,58,237,.3)}
.theme-btn{background:none;border:1px solid var(--border);color:var(--muted);width:34px;height:34px;border-radius:8px;cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:all .2s}
.theme-btn:hover{border-color:var(--cyan);color:var(--cyan)}

/* PAGES */
.page{display:none}
.page.active{display:block;animation:fadeUp .3s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* HERO */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;padding:6rem 2rem 4rem}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 60% 40%,var(--hero-grad1) 0%,transparent 60%),radial-gradient(ellipse 50% 50% at 20% 70%,var(--hero-grad2) 0%,transparent 55%),var(--bg)}
.hero-grid-lines{position:absolute;inset:0;background-image:linear-gradient(var(--hero-grid) 1px,transparent 1px),linear-gradient(90deg,var(--hero-grid) 1px,transparent 1px);background-size:60px 60px}
.hero-blob1{position:absolute;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,var(--hero-grad1) 0%,transparent 70%);top:-100px;right:-100px}
.hero-blob2{position:absolute;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,var(--hero-grad2) 0%,transparent 70%);bottom:50px;left:10%}
.hero-inner{max-width:1140px;margin:0 auto;width:100%;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:3rem;align-items:start;position:relative;z-index:1}
.hero-eyebrow{display:inline-flex;align-items:center;gap:.5rem;background:rgba(0,119,204,.08);border:1px solid rgba(0,119,204,.2);border-radius:100px;padding:.3rem 1rem;font-size:.68rem;color:var(--cyan);letter-spacing:.1em;text-transform:uppercase;margin-bottom:1.2rem}
html.dark .hero-eyebrow{background:rgba(0,229,255,.08);border-color:rgba(0,229,255,.2)}
.hero-eyebrow::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--cyan);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.4)}}
.hero h1{font-family:var(--heading);font-size:2.6rem;font-weight:800;line-height:1.2;color:var(--white);margin-bottom:1.2rem;word-break:break-word;overflow-wrap:break-word}
.hero h1 .accent{background:linear-gradient(135deg,var(--cyan),var(--violet-bright));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;padding-bottom:.1em;display:inline-block}
.hero-desc{color:var(--muted);font-size:.95rem;line-height:1.8;margin-bottom:2rem;max-width:100%}
.hero-actions{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}
.btn-primary{background:linear-gradient(135deg,var(--violet),var(--cyan-dim));color:#fff;border:none;padding:.75rem 1.8rem;font-family:var(--body);font-size:.85rem;font-weight:500;cursor:pointer;border-radius:8px;letter-spacing:.04em;transition:opacity .2s,transform .2s;text-decoration:none;display:inline-block}
.btn-primary:hover{opacity:.9;transform:translateY(-1px)}
.btn-ghost{background:none;border:1px solid var(--border);color:var(--muted);padding:.75rem 1.5rem;font-family:var(--body);font-size:.85rem;cursor:pointer;border-radius:8px;transition:all .2s}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.stats-row{display:flex;gap:1.5rem;margin-top:2rem;padding-top:2rem;border-top:1px solid var(--border);flex-wrap:wrap}
.stat-num{font-family:var(--heading);font-size:1.6rem;font-weight:800;background:linear-gradient(135deg,var(--cyan),var(--violet-bright));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.stat-lbl{font-size:.7rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-top:.2rem}
/* Both hero columns strictly contained */
.hero-inner>div{min-width:0;overflow:hidden}

/* CAROUSEL */
.carousel-wrap{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:20px;overflow:hidden;width:100%}
.carousel-wrap::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--violet),var(--cyan),var(--magenta));z-index:2}
.carousel-track{display:flex;width:100%;transition:transform .45s cubic-bezier(.4,0,.2,1)}
.carousel-slide{min-width:100%;width:100%;display:flex;flex-direction:column;flex-shrink:0}
.carousel-img-wrap{width:100%;height:200px;overflow:hidden;background:var(--bg2);display:flex;align-items:center;justify-content:center}
.carousel-img-wrap img{width:100%;height:200px;object-fit:cover}
.carousel-body{padding:1.4rem}
.carousel-tag{font-size:.65rem;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);font-weight:500;margin-bottom:.4rem}
.carousel-title{font-family:var(--heading);font-size:1rem;font-weight:700;color:var(--white);line-height:1.35}
.carousel-controls{display:flex;align-items:center;justify-content:space-between;padding:.8rem 1.4rem 1.2rem;border-top:1px solid var(--border)}
.carousel-dots{display:flex;gap:.4rem}
.carousel-dot{width:6px;height:6px;border-radius:50%;background:var(--border);border:none;cursor:pointer;padding:0;transition:all .2s}
.carousel-dot.active{background:var(--cyan);width:18px;border-radius:3px}
.carousel-arrows{display:flex;gap:.4rem}
.carousel-btn{background:var(--surface2);border:1px solid var(--border);color:var(--muted);width:30px;height:30px;border-radius:8px;cursor:pointer;font-size:.9rem;display:flex;align-items:center;justify-content:center;transition:all .2s}
.carousel-btn:hover{border-color:var(--cyan);color:var(--cyan)}
/* Prevent hero grid column from overflowing */

/* SECTION */
.sec{padding:5rem 2rem}
.sec-inner{max-width:1140px;margin:0 auto}
.sec-dark{background:var(--bg2)}
.sec-tag{display:inline-block;font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;color:var(--cyan);margin-bottom:.75rem;font-weight:500}
.sec-title{font-family:var(--heading);font-size:2.4rem;font-weight:800;color:var(--white);margin-bottom:.5rem;line-height:1.1}
.sec-title .g{background:linear-gradient(135deg,var(--cyan),var(--violet-bright));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.sec-lead{color:var(--muted);font-size:1rem;max-width:560px;margin-bottom:3rem}

/* NEWS */
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}
.news-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden;transition:border-color .3s,transform .3s}
.news-card:hover{border-color:rgba(0,119,204,.35);transform:translateY(-4px)}
html.dark .news-card:hover{border-color:rgba(0,229,255,.3)}
.news-card-img{width:100%;height:160px;object-fit:cover;background:var(--bg2);display:block}
.news-card-img-placeholder{width:100%;height:160px;background:var(--bg2);display:flex;align-items:center;justify-content:center;font-size:2.5rem;opacity:.2}
.news-card-body{padding:1.5rem}
.news-tag-pill{display:inline-block;font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;padding:.2rem .7rem;border-radius:100px;background:rgba(0,119,204,.1);color:var(--cyan);border:1px solid rgba(0,119,204,.2);margin-bottom:.8rem;font-weight:500}
html.dark .news-tag-pill{background:rgba(0,229,255,.1);border-color:rgba(0,229,255,.2)}
.news-card h3{font-family:var(--heading);font-size:1rem;font-weight:700;color:var(--white);line-height:1.4;margin-bottom:.5rem}
.news-card p{font-size:.87rem;color:var(--muted);line-height:1.7}
.news-date{margin-top:.8rem;font-size:.75rem;color:var(--muted);opacity:.6}

/* RESEARCH */
.research-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}
.research-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden;transition:all .3s}
.research-card:hover{border-color:rgba(109,40,217,.35);transform:translateY(-3px)}
html.dark .research-card:hover{border-color:rgba(124,58,237,.4)}
.research-card-img{width:100%;height:170px;object-fit:cover;background:var(--bg2);display:flex;align-items:center;justify-content:center}
.research-card-body{padding:1.5rem}
.research-card h3{font-family:var(--heading);font-size:1.05rem;font-weight:700;color:var(--white);margin-bottom:.6rem}
.research-card p{font-size:.87rem;color:var(--muted);line-height:1.75;margin-bottom:1rem}
.tag-row{display:flex;flex-wrap:wrap;gap:.4rem}
.tag{font-size:.67rem;padding:.2rem .6rem;border-radius:100px;background:var(--surface2);border:1px solid var(--border);color:var(--muted)}

/* PROJECTS */
.project-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden;transition:all .3s;margin-bottom:1.5rem}
.project-card:hover{border-color:rgba(0,119,204,.3);transform:translateY(-2px)}
html.dark .project-card:hover{border-color:rgba(0,229,255,.25)}
.project-card-inner{display:grid;grid-template-columns:220px 1fr;align-items:stretch}
.project-card-img{width:220px;min-height:160px;object-fit:cover;background:var(--bg2);display:flex;align-items:center;justify-content:center}
.project-card-img img{width:220px;min-height:160px;object-fit:cover}
.project-card-body{padding:1.8rem;border-left:1px solid var(--border)}
.project-status{display:inline-flex;align-items:center;gap:.4rem;font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;padding:.2rem .75rem;border-radius:100px;margin-bottom:.8rem;font-weight:500}
.project-status.active{background:rgba(13,148,136,.1);color:var(--teal);border:1px solid rgba(13,148,136,.25)}
.project-status.completed{background:rgba(109,40,217,.1);color:var(--violet-bright);border:1px solid rgba(109,40,217,.2)}
.project-status.active::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--teal)}
.project-card h3{font-family:var(--heading);font-size:1.1rem;font-weight:700;color:var(--white);margin-bottom:.5rem;line-height:1.35}
.project-card p{font-size:.87rem;color:var(--muted);line-height:1.75;margin-bottom:1rem}
.project-meta{display:flex;gap:1.5rem;flex-wrap:wrap;font-size:.78rem;color:var(--muted)}

/* MEMBERS */
.members-tabs{display:flex;gap:.5rem;margin-bottom:2.5rem;border-bottom:1px solid var(--border)}
.members-tab{background:none;border:none;font-family:var(--body);font-size:.88rem;font-weight:500;color:var(--muted);cursor:pointer;padding:.7rem 1.2rem;position:relative;transition:color .2s;border-bottom:2px solid transparent;margin-bottom:-1px}
.members-tab.active{color:var(--cyan);border-bottom-color:var(--cyan)}
.members-tab:hover{color:var(--cyan)}
.members-panel{display:none}
.members-panel.active{display:block}
.members-group-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:var(--cyan);font-weight:500;margin:2.5rem 0 1.2rem}
.members-group-label:first-child{margin-top:0}
.members-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.2rem}
.member-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden;text-align:center;transition:all .3s}
.member-card:hover{border-color:rgba(109,40,217,.35);transform:translateY(-3px)}
.member-photo{width:100%;height:130px;object-fit:cover;display:block}
.member-photo-placeholder{width:100%;height:130px;background:var(--bg2)}
.member-card-body{padding:1.2rem 1rem}
.avatar-ring{width:64px;height:64px;border-radius:50%;margin:0 auto .7rem;position:relative}
.avatar-ring::before{content:'';position:absolute;inset:-2px;border-radius:50%;background:linear-gradient(135deg,var(--violet),var(--cyan));z-index:0}
.avatar-ring span{position:relative;z-index:1;width:60px;height:60px;border-radius:50%;background:var(--surface2);display:flex;align-items:center;justify-content:center;color:var(--cyan);font-family:var(--heading);font-size:1.1rem;font-weight:800;margin:2px auto 0}
.member-name{font-family:var(--heading);font-size:.92rem;font-weight:700;color:var(--white);margin-bottom:.2rem}
.member-role{font-size:.75rem;color:var(--violet-bright);font-weight:500;margin-bottom:.25rem}
.member-spec{font-size:.73rem;color:var(--muted);line-height:1.5}
.member-orcid{display:inline-flex;align-items:center;gap:.3rem;font-size:.7rem;color:var(--teal);text-decoration:none;margin-top:.4rem;transition:opacity .2s}
.member-orcid:hover{opacity:.75}
.alumni-grid{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}
.alumni-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.2rem 1.4rem;display:flex;align-items:center;gap:1.2rem;transition:all .3s}
.alumni-card:hover{border-color:rgba(109,40,217,.3)}
.alumni-avatar{width:48px;height:48px;border-radius:50%;background:var(--surface2);flex-shrink:0;overflow:hidden;display:flex;align-items:center;justify-content:center;font-family:var(--heading);font-weight:800;font-size:.95rem;color:var(--muted)}
.alumni-avatar img{width:100%;height:100%;object-fit:cover}
.alumni-name{font-family:var(--heading);font-size:.92rem;font-weight:700;color:var(--white)}
.alumni-info{font-size:.78rem;color:var(--muted);margin-top:.1rem}

/* PUBLICATIONS */
.pub-source-tabs{display:flex;gap:.5rem;margin-bottom:2rem}
.pub-source-tab{background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:.4rem 1rem;font-size:.78rem;font-weight:500;color:var(--muted);cursor:pointer;font-family:var(--body);transition:all .2s}
.pub-source-tab.active{background:rgba(0,119,204,.12);border-color:var(--cyan);color:var(--cyan)}
html.dark .pub-source-tab.active{background:rgba(0,229,255,.1)}
.pub-panel{display:none}
.pub-panel.active{display:block}
.pub-year{font-family:var(--heading);font-size:1.4rem;font-weight:800;color:var(--white);padding-bottom:.6rem;border-bottom:1px solid var(--border);margin:2.5rem 0 1.2rem}
.pub-year:first-child{margin-top:0}
.pub-item{border-left:2px solid var(--violet);padding:1rem 1.2rem;background:var(--surface);border-radius:0 12px 12px 0;margin-bottom:1rem;transition:border-color .2s}
.pub-item:hover{border-color:var(--cyan)}
.pub-item h4{font-family:var(--heading);font-size:.93rem;font-weight:700;color:var(--white);margin-bottom:.3rem;line-height:1.45}
.pub-authors{font-size:.83rem;color:var(--muted);font-style:italic;margin-bottom:.2rem}
.pub-journal{font-size:.8rem;color:var(--cyan-dim)}
.pub-doi{font-size:.78rem;color:var(--teal);text-decoration:none;display:inline-block;margin-top:.3rem}
.pub-doi:hover{text-decoration:underline}
.orcid-loading{text-align:center;padding:2rem;color:var(--muted);font-size:.88rem}
.orcid-spin{display:inline-block;width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--cyan);border-radius:50%;animation:spin .8s linear infinite;margin-right:.5rem;vertical-align:middle}

/* CONTACT */
.contact-wrap{background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:3rem;display:grid;grid-template-columns:1fr 1fr 1fr;gap:2rem;position:relative;overflow:hidden}
.contact-wrap::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--violet),var(--cyan),var(--magenta))}
.contact-block h4{font-family:var(--heading);font-size:1rem;font-weight:700;color:var(--cyan);margin-bottom:1rem}
.contact-block p,.contact-block a{font-size:.88rem;color:var(--muted);line-height:2;display:block;text-decoration:none;transition:color .2s}
.contact-block a:hover{color:var(--cyan)}
.sponsors-section{margin-top:3rem}
.sponsors-label{font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);margin-bottom:1.2rem}
.sponsors-list{display:flex;flex-wrap:wrap;gap:.8rem}
.sponsor-pill{background:var(--surface2);border:1px solid var(--border);border-radius:100px;padding:.4rem 1.1rem;font-size:.78rem;color:var(--muted);transition:all .2s}
.sponsor-pill:hover{border-color:var(--cyan);color:var(--cyan)}

/* JOIN */
.join-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.join-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:2rem;transition:border-color .3s}
.join-card:hover{border-color:rgba(0,119,204,.3)}
html.dark .join-card:hover{border-color:rgba(0,229,255,.3)}
.join-card h3{font-family:var(--heading);font-size:1.1rem;font-weight:700;color:var(--white);margin-bottom:.7rem}
.join-card p{font-size:.88rem;color:var(--muted);line-height:1.75;margin-bottom:1rem}
.join-card ul{padding-left:1.1rem}
.join-card ul li{font-size:.85rem;color:var(--muted);line-height:2}
.join-cta-box{background:linear-gradient(135deg,rgba(109,40,217,.08),rgba(0,119,204,.06));border:1px solid rgba(109,40,217,.2);border-radius:16px;padding:2rem;grid-column:span 2;display:flex;align-items:center;justify-content:space-between;gap:2rem}
html.dark .join-cta-box{background:linear-gradient(135deg,rgba(124,58,237,.2),rgba(0,229,255,.1));border-color:rgba(124,58,237,.35)}
.join-cta-box h3{font-family:var(--heading);font-size:1.3rem;font-weight:700;color:var(--white);margin-bottom:.4rem}
.join-cta-box p{font-size:.88rem;color:var(--muted)}

footer{background:var(--footer-bg);padding:1.5rem 2rem;text-align:center;font-size:.75rem;color:var(--footer-color);border-top:1px solid var(--border)}
@keyframes spin{to{transform:rotate(360deg)}}

/* ══════════════════════════════════════════
   RESPONSIVE — TABLET  (≤ 900px)
══════════════════════════════════════════ */
@media(max-width:900px){
  /* Hero: stack vertically */
  .hero{padding:5rem 1.5rem 3rem;min-height:auto}
  .hero-inner{grid-template-columns:1fr;gap:2.5rem}
  .hero h1{font-size:2.2rem}

  /* About section */
  .sec>[style*="grid-template-columns:1fr 1fr"]{grid-template-columns:1fr !important;gap:2.5rem !important}

  /* Research: 1 column */
  .research-grid{grid-template-columns:1fr}

  /* Projects: image on top */
  .project-card-inner{grid-template-columns:1fr}
  .project-card-img{width:100%;min-height:180px}
  .project-card-img img{width:100%;min-height:180px}
  .project-card-body{border-left:none;border-top:1px solid var(--border);padding:1.4rem}

  /* Contact: 2 columns */
  .contact-wrap{grid-template-columns:1fr 1fr;padding:2rem}

  /* Join: 1 column */
  .join-grid{grid-template-columns:1fr}
  .join-cta-box{grid-column:span 1;flex-direction:column;align-items:flex-start}

  /* Alumni: 1 column */
  .alumni-grid{grid-template-columns:1fr}

  /* Section padding */
  .sec{padding:3.5rem 1.5rem}
  .sec-title{font-size:2rem}
}

/* ══════════════════════════════════════════
   RESPONSIVE — MOBILE  (≤ 640px)
══════════════════════════════════════════ */

/* Hamburger button — hidden on desktop */
.hamburger{display:none;align-items:center;justify-content:center;width:36px;height:36px;background:none;border:1px solid var(--border);border-radius:8px;cursor:pointer;color:var(--muted);flex-direction:column;gap:5px;padding:8px;transition:all .2s;flex-shrink:0}
.hamburger:hover{border-color:var(--cyan);color:var(--cyan)}
.hamburger span{display:block;width:16px;height:1.5px;background:currentColor;border-radius:2px;transition:all .25s}
.hamburger.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0;transform:scaleX(0)}
.hamburger.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* Mobile drawer — always in DOM, slides in from top */
.mobile-drawer{
  display:none; /* only shown on mobile */
  position:fixed;
  top:64px; left:0; right:0;
  background:var(--surface);
  border-bottom:2px solid var(--border);
  z-index:190;
  transform:translateY(-110%);
  transition:transform .3s cubic-bezier(.4,0,.2,1);
  box-shadow:0 8px 32px rgba(0,0,0,.15);
}
.mobile-drawer.open{transform:translateY(0)}
.mobile-nav-links{list-style:none;padding:.5rem 0}
.mobile-nav-links li{border-bottom:1px solid var(--border)}
.mobile-nav-links li:last-child{border-bottom:none}
.mobile-nav-links button{
  width:100%;text-align:left;
  background:none;border:none;
  font-family:var(--body);font-size:.95rem;font-weight:500;
  color:var(--white);cursor:pointer;
  padding:1rem 1.5rem;
  letter-spacing:.02em;
  transition:background .15s,color .15s;
}
.mobile-nav-links button:hover{background:var(--bg2);color:var(--cyan)}
.mobile-drawer-footer{padding:.8rem 1.2rem 1.2rem}

/* Overlay behind drawer */
.drawer-overlay{
  display:none;
  position:fixed;inset:0;
  background:rgba(0,0,0,.35);
  z-index:189;
}
.drawer-overlay.show{display:block}

@media(max-width:640px){
  /* Show hamburger, hide desktop links and admin btn */
  .hamburger{display:flex}
  .nav-links{display:none !important}
  .nav-admin-btn{display:none}

  /* Show drawer element */
  .mobile-drawer{display:block}

  /* Hero */
  .hero{padding:4.5rem 1.2rem 2.5rem}
  .hero h1{font-size:1.9rem}
  .hero-desc{font-size:.9rem}
  .stats-row{gap:1rem}
  .stat-num{font-size:1.4rem}

  /* Sections */
  .sec{padding:3rem 1.2rem}
  .sec-title{font-size:1.7rem}
  .sec-lead{font-size:.9rem}

  /* News: 1 column */
  .news-grid{grid-template-columns:1fr}

  /* Members: 2 columns */
  .members-grid{grid-template-columns:repeat(2,1fr)}

  /* Contact: 1 column */
  .contact-wrap{grid-template-columns:1fr;padding:1.5rem}

  /* About stats: 2 cols */
  #about-stats{grid-template-columns:1fr 1fr !important}

  /* Pub tabs: wrap */
  .pub-source-tabs{flex-wrap:wrap}

  /* Nav logo: hide subtitle */
  .nav-logo-sub{display:none}
}