:root{
  --bg:#f7f6f2;--surface:#fff;--border:#e2e0d8;
  --text:#1a1a18;--muted:#6b6860;
  --accent:#1a4a3a;--accent-light:#e8f0ec;--accent-border:#c3d9ce;
  --accent2:#c8400a;
  --serif:'DM Serif Display',serif;
  --mono:'DM Mono',monospace;
  --sans:'DM Sans',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--text);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
main{flex:1}

/* NAV (satellite pages) */
nav{position:sticky;top:0;z-index:200;background:rgba(247,246,242,.93);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 3rem;height:62px;gap:1rem}
.nav-logo{font-family:var(--serif);font-size:1.2rem;color:var(--accent);text-decoration:none}
.nav-links{display:flex;gap:1.4rem;list-style:none;align-items:center;flex-wrap:wrap}
.nav-links a{text-decoration:none;color:var(--muted);font-size:.85rem;font-weight:500;transition:color .2s}
.nav-links a:hover,.nav-links a.current{color:var(--text)}
.btn-nav{background:var(--accent);color:#fff!important;padding:.38rem .95rem;border-radius:4px;font-size:.8rem!important;font-weight:600!important}
.btn-nav:hover{opacity:.85}

/* HERO */
.hero{max-width:860px;margin:0 auto;padding:6rem 2rem 3.5rem;text-align:center;animation:fadeUp .7s ease both}
.hero.small{padding:4rem 2rem 1rem}
.eyebrow{display:inline-block;font-family:var(--mono);font-size:.72rem;color:var(--accent);background:var(--accent-light);border:1px solid var(--accent-border);border-radius:100px;padding:.28rem .9rem;margin-bottom:1.4rem;letter-spacing:.05em;text-transform:uppercase}
.hero h1{font-family:var(--serif);font-size:clamp(2.4rem,5vw,3.8rem);line-height:1.08;letter-spacing:-.02em;margin-bottom:1.2rem}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero p{font-size:1.05rem;color:var(--muted);max-width:560px;margin:0 auto;font-weight:300;line-height:1.78}

/* SATELLITE CARDS (index) */
.portals{max-width:1080px;margin:0 auto;padding:1rem 2rem 6rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:1rem}
.portal{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.4rem 1.3rem;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:.5rem;transition:border-color .2s,transform .2s;animation:fadeUp .7s ease both}
.portal:hover{border-color:var(--accent);transform:translateY(-3px)}
.portal-num{font-family:var(--mono);font-size:.68rem;color:var(--muted);letter-spacing:.08em}
.portal-title{font-family:var(--serif);font-size:1.3rem;line-height:1.2;color:var(--accent)}
.portal-desc{font-size:.8rem;color:var(--muted);line-height:1.55;flex:1}
.portal-go{font-family:var(--mono);font-size:.72rem;color:var(--accent);font-weight:500}
.portal.soon{opacity:.6;pointer-events:none}
.portal.soon .portal-go{color:var(--muted)}

/* SECTIONS */
section{max-width:1080px;margin:0 auto;padding:3rem 2rem 5rem}
.sec-label{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:.4rem}
.sec-title{font-family:var(--serif);font-size:clamp(1.7rem,3vw,2.4rem);letter-spacing:-.02em;margin-bottom:.9rem;line-height:1.15}
.sec-sub{color:var(--muted);max-width:580px;font-weight:300;line-height:1.72;margin-bottom:2.5rem}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:1.5rem;flex-wrap:wrap;margin-bottom:2.5rem}
.sec-head .sec-sub{margin-bottom:0}
.btn-primary{background:var(--accent);color:#fff;padding:.72rem 1.6rem;border-radius:5px;text-decoration:none;font-weight:600;font-size:.9rem;transition:opacity .2s,transform .15s;white-space:nowrap}
.btn-primary:hover{opacity:.88;transform:translateY(-1px)}

/* PACKAGES */
.pkg-filter{display:flex;gap:.45rem;flex-wrap:wrap;margin-bottom:1.4rem}
.pkg-filter button{font-family:var(--mono);font-size:.72rem;font-weight:600;color:var(--muted);background:var(--surface);border:1px solid var(--border);border-radius:100px;padding:.3rem .9rem;cursor:pointer;transition:all .15s}
.pkg-filter button:hover{border-color:var(--accent);color:var(--accent)}
.pkg-filter button.active{background:var(--accent);border-color:var(--accent);color:#fff}
.pkg-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1px;background:var(--border);border:1px solid var(--border);border-radius:12px;overflow:hidden}
.pkg-card{background:var(--surface);padding:1.75rem;display:flex;flex-direction:column;gap:.8rem;color:inherit;transition:background .2s}
.pkg-card:hover{background:#fafaf8}
.pkg-name{font-family:var(--mono);font-size:.92rem;font-weight:600;color:var(--accent);margin-bottom:.1rem}
.pkg-tag{font-size:.75rem;color:var(--muted);margin-top:.1rem}
.lang-row{display:flex;gap:.35rem;flex-wrap:wrap;align-items:center}
.lang-pill{font-family:var(--mono);font-size:.62rem;font-weight:700;letter-spacing:.04em;padding:.2rem .52rem;border-radius:4px;text-transform:uppercase}
.lang-pill.stata{background:#e8edf8;color:#2a4aaa}
.lang-pill.r{background:#fde8ef;color:#a01848}
.lang-pill.py{background:#e8f4e8;color:#186818}
.lang-pill.julia{background:#f1e8f6;color:#7a3a9a}
.pkg-desc{font-size:.85rem;color:var(--muted);line-height:1.65;flex:1}
.pkg-desc a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.install-snippets{display:flex;flex-direction:column;gap:.4rem;margin-top:.2rem}
.snippet{display:flex;align-items:center;gap:.5rem;background:#f4f2ee;border-radius:5px;padding:.32rem .6rem;overflow:hidden}
.snippet-lang{font-family:var(--mono);font-size:.62rem;color:var(--muted);font-weight:600;min-width:40px;text-transform:uppercase;flex-shrink:0}
.snippet-cmds{flex:1;min-width:0}
.snippet-cmd{display:block;font-family:var(--mono);font-size:.72rem;color:var(--accent2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.snippet:hover .snippet-cmd{overflow:visible;white-space:normal;word-break:break-all}
.snippet-copy{cursor:pointer;opacity:.4;font-size:.72rem;border:none;background:none;color:var(--muted);padding:0;transition:opacity .2s;flex-shrink:0}
.snippet-copy:hover{opacity:1}
.pkg-footer{display:flex;gap:.8rem;align-items:center;font-family:var(--mono);font-size:.7rem;color:var(--muted);margin-top:.2rem;flex-wrap:wrap}
.pkg-links{margin-left:auto;display:flex;gap:.8rem}
.pkg-gh-link{font-family:var(--mono);font-size:.72rem;color:var(--accent);opacity:.7;transition:opacity .2s}
.pkg-card:hover .pkg-gh-link{opacity:1}

/* TEAM */
.team-sub-label{font-size:.7rem;font-family:var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin-bottom:1rem}
.team-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:1.4rem;margin-bottom:3rem}
.team-row{display:flex;flex-wrap:wrap;gap:1.4rem;margin-bottom:2.5rem}
.team-row .team-card{flex:0 0 240px;max-width:240px}
.team-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:border-color .2s,transform .2s}
.team-card:hover{border-color:#aaa;transform:translateY(-3px)}
.team-card.alumni{opacity:.84}
.team-photo{width:100%;aspect-ratio:1/1;object-fit:cover;object-position:top center;display:block;background:#f0eeea}
.team-placeholder{width:100%;aspect-ratio:1/1;display:none;align-items:center;justify-content:center;background:var(--accent-light);font-family:var(--serif);font-size:2.5rem;color:var(--accent)}
.team-card.alumni .team-placeholder{background:#f0eeea;color:#aaa}
.team-body{padding:1rem 1.1rem 1.2rem}
.team-name{font-weight:600;font-size:.86rem;margin-bottom:.15rem;line-height:1.3}
.team-role{font-size:.72rem;color:var(--muted);font-style:italic;margin-bottom:.45rem}
.team-affil{font-size:.7rem;color:var(--muted);line-height:1.5;margin-bottom:.65rem}
.team-links{display:flex;gap:.38rem;flex-wrap:wrap}
.team-link{font-family:var(--mono);font-size:.63rem;color:var(--accent);text-decoration:none;border:1px solid var(--accent-border);padding:.18rem .48rem;border-radius:3px;transition:background .15s}
.team-link:hover{background:var(--accent-light)}

/* FOOTER */
footer{border-top:1px solid var(--border);padding:2.2rem 3rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
footer img{height:56px;width:auto;flex-shrink:0}
.foot-brand{font-family:var(--serif);font-size:1rem;color:var(--accent)}
.foot-links{display:flex;gap:1.4rem;list-style:none}
.foot-links a{text-decoration:none;font-size:.8rem;color:var(--muted)}
.foot-links a:hover{color:var(--text)}
.foot-legal{font-size:.72rem;color:var(--muted);flex-basis:100%}

@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}

@media(max-width:720px){
  nav{padding:.7rem 1rem;height:auto;flex-wrap:wrap}
  .nav-links{gap:.8rem}
  .team-row .team-card{flex:1 1 100%;max-width:none}
  .team-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
  .pkg-grid{grid-template-columns:1fr}
  footer{padding:2rem 1rem}
  .hero{padding:4rem 1rem 2.5rem}
  .portals,section{padding-left:1rem;padding-right:1rem}
}

/* LANDING: top bar + polished button row */
.nav-home{justify-content:space-between}
.hero.landing{padding:6.5rem 2rem 2rem}
.hero.landing p{margin:0 auto 2.75rem}
.actions{display:flex;justify-content:center;flex-wrap:wrap;gap:.75rem;max-width:1160px;margin:0 auto;padding:0 2rem 7rem;animation:fadeUp .7s .1s ease both}
.act{display:flex;align-items:center;justify-content:center;gap:.5rem;min-height:54px;min-width:150px;padding:.8rem 1.4rem;border-radius:8px;border:1px solid var(--accent);background:var(--accent);color:#fff;text-decoration:none;font-weight:600;font-size:.9rem;line-height:1.25;text-align:center;white-space:nowrap;box-shadow:0 1px 2px rgba(26,26,24,.06);transition:background .2s,box-shadow .2s,transform .15s}
.act:hover{background:#143a2e;box-shadow:0 8px 20px -10px rgba(26,74,58,.6);transform:translateY(-2px)}
.act.soon{opacity:.55;box-shadow:none;pointer-events:none}
.act .tag{font-family:var(--mono);font-size:.6rem;letter-spacing:.06em;text-transform:uppercase;background:rgba(255,255,255,.18);color:#fff;padding:.12rem .45rem;border-radius:100px}
@media(max-width:1100px){.actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));max-width:620px}.actions .act:first-child{grid-column:1/-1}}
@media(max-width:480px){.actions{grid-template-columns:1fr;padding:0 1rem 5rem}}