:root{
  --ink:#211a33;--muted:#675f78;--soft:#faf7ff;--panel:#fff;--line:#eadfff;--accent:#7b5de3;--accent2:#cbb7ff;--accent3:#f3edff;--shadow:0 24px 70px rgba(72,50,130,.14);--radius:30px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:linear-gradient(180deg,#fbf8ff 0,#fff 38%,#fbf8ff 100%);line-height:1.6}.wrap{width:min(1120px,calc(100% - 40px));margin:0 auto}.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.82);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:26px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:var(--ink);font-weight:750}.mark{display:grid;place-items:center;width:42px;height:42px;border-radius:15px;background:var(--accent3);color:var(--accent);font-weight:850;border:1px solid var(--line)}.links{display:flex;align-items:center;gap:10px}.links a{color:var(--ink);text-decoration:none;font-weight:700;font-size:14px;padding:10px 15px;border-radius:999px}.links a:hover,.links a.active{background:var(--accent3);color:#5a3ec7}.hero{padding:86px 0 76px;border-bottom:1px solid var(--line);overflow:hidden}.hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) 420px;gap:70px;align-items:center}.eyebrow{display:inline-flex;gap:8px;align-items:center;padding:8px 13px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.7);color:var(--muted);font-weight:750;font-size:13px}.dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}h1{font-size:clamp(42px,6vw,72px);line-height:1.03;letter-spacing:-.035em;margin:22px 0 18px}.credential{font-size:20px;font-weight:800;margin:0 0 4px}.role{font-size:17px;color:var(--muted);font-weight:650;margin:0 0 22px}.lead{max-width:680px;font-size:19px;color:var(--muted);margin:0 0 16px}.actions{display:flex;flex-wrap:wrap;gap:13px;margin-top:30px}.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 19px;border-radius:999px;text-decoration:none;font-weight:800;border:1px solid var(--line);color:#5b41c7;background:#fff}.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 12px 28px rgba(123,93,227,.24)}.portrait-card{position:relative;min-height:560px;display:flex;align-items:flex-end;justify-content:center}.orb{position:absolute;inset:auto 0 16px auto;width:380px;height:380px;border-radius:44% 56% 51% 49%;background:radial-gradient(circle at 35% 30%,#fff 0 18%,#efe6ff 19% 58%,#ddcdfb 59% 100%);filter:drop-shadow(var(--shadow))}.portrait-card img{position:relative;z-index:2;max-width:390px;width:92%;height:auto;filter:drop-shadow(0 28px 40px rgba(31,20,57,.2))}.floating-note{position:absolute;z-index:3;left:4px;bottom:72px;max-width:214px;padding:18px 18px 17px;border-radius:22px;background:rgba(255,255,255,.88);border:1px solid var(--line);box-shadow:var(--shadow);font-weight:700}.floating-note span{display:block;color:var(--muted);font-weight:600;font-size:14px;margin-top:3px}.section{padding:68px 0}.section.alt{background:rgba(246,240,255,.55);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section-head{max-width:760px;margin-bottom:30px}.kicker{font-size:13px;text-transform:uppercase;letter-spacing:.16em;color:var(--accent);font-weight:850}.section h2{font-size:clamp(30px,4vw,46px);line-height:1.12;letter-spacing:-.02em;margin:8px 0 12px}.section p{color:var(--muted)}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.card{background:rgba(255,255,255,.82);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 12px 35px rgba(72,50,130,.06)}.card h3{font-size:22px;line-height:1.22;margin:0 0 10px;letter-spacing:-.01em}.card p,.card li{color:var(--muted)}.feature{display:flex;gap:16px}.icon{flex:0 0 auto;width:46px;height:46px;border-radius:16px;background:var(--accent3);display:grid;place-items:center;color:var(--accent)}.icon svg{width:24px;height:24px}.list{padding-left:19px;margin:12px 0 0}.pub{padding:22px 0;border-bottom:1px solid var(--line)}.pub:last-child{border-bottom:0}.pub strong{display:block;color:var(--ink);font-size:17px}.pub span{display:block;color:var(--muted);font-size:15px;margin-top:4px}.course-list{display:grid;gap:10px}.course{padding:15px 17px;border:1px solid var(--line);border-radius:18px;background:#fff;color:var(--muted);font-weight:650}.social-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.social{display:flex;gap:15px;align-items:center;padding:20px;border-radius:24px;border:1px solid var(--line);background:#fff;text-decoration:none;color:var(--ink)}.social strong{display:block}.social span{display:block;color:var(--muted);font-size:14px}.social:hover{transform:translateY(-2px);box-shadow:0 16px 35px rgba(72,50,130,.12)}.footer{padding:36px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.footer-grid{display:flex;justify-content:space-between;gap:20px}.page-hero{padding:70px 0 44px;border-bottom:1px solid var(--line)}.page-hero h1{font-size:clamp(42px,5.5vw,64px);line-height:1.08;letter-spacing:-.025em;margin-bottom:14px}.page-hero p{max-width:780px;color:var(--muted);font-size:18px}.mini-img{min-height:220px;border-radius:30px;background:linear-gradient(135deg,#fff,#f1e8ff);border:1px solid var(--line);display:grid;place-items:center;overflow:hidden}.mini-img img{max-height:250px;max-width:100%;object-fit:contain;filter:drop-shadow(0 20px 28px rgba(31,20,57,.16))}@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:34px}.portrait-card{min-height:430px}.grid-3,.grid-2,.social-grid{grid-template-columns:1fr}.links{display:none}.footer-grid{display:block}h1{font-size:46px}.hero{padding-top:54px}.floating-note{left:18px}.orb{right:10px;width:320px;height:320px}}@media(max-width:520px){.wrap{width:min(100% - 28px,1120px)}.portrait-card img{width:96%}.floating-note{position:relative;left:auto;bottom:auto;margin-top:-54px}.portrait-card{display:block;text-align:center}.orb{left:50%;transform:translateX(-50%);bottom:60px}.actions{display:grid}.btn{justify-content:center}}

/* Brand social icons */
.social{gap:16px;padding:18px 20px;transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease}
.social:hover{border-color:#ccb9ff}
.social-icon{flex:0 0 auto;width:38px;height:38px;border-radius:12px;display:grid;place-items:center;overflow:hidden;box-shadow:0 8px 18px rgba(72,50,130,.12)}
.social-icon svg{display:block;width:38px;height:38px}
.social-icon.website{box-shadow:0 8px 18px rgba(111,86,217,.18)}
.social span{line-height:1.3}

/* v5 redone: colored PNG platform icons and looser header typography */
.social-icon{width:42px;height:42px;border-radius:10px;background:transparent;box-shadow:none;overflow:visible}
.social-icon img{display:block;width:42px;height:42px;object-fit:contain}
.social-icon.website img{width:40px;height:40px}
.kicker{letter-spacing:.2em}


/* Mobile navigation */
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:5px;width:44px;height:44px;border:1px solid var(--line);border-radius:15px;background:#fff;color:var(--ink);cursor:pointer;box-shadow:0 10px 24px rgba(72,50,130,.08)}
.menu-toggle span{display:block;width:20px;height:2px;border-radius:999px;background:var(--ink);transition:transform .18s ease, opacity .18s ease}
.menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{border-top:1px solid var(--line);background:rgba(255,255,255,.96);box-shadow:0 18px 34px rgba(72,50,130,.08)}
.mobile-menu-inner{display:grid;gap:8px;padding:14px 0 18px}
.mobile-menu a{display:block;text-decoration:none;color:var(--ink);font-weight:800;padding:14px 16px;border-radius:16px;background:rgba(250,247,255,.78);border:1px solid transparent}
.mobile-menu a.active,.mobile-menu a:hover{color:#5a3ec7;background:var(--accent3);border-color:var(--line)}
@media(max-width:900px){.menu-toggle{display:flex}.nav{height:66px}.brand{min-width:0}.brand span:last-child{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.links{display:none}.topbar.menu-open{background:#fff}}
@media(min-width:901px){.mobile-menu{display:none!important}.menu-toggle{display:none!important}}

/* v7: cache-busted, robust mobile navigation fix */
@media (max-width: 900px) {
  .topbar .nav {
    height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .topbar .links {
    display: none !important;
  }
  .menu-toggle {
    display: inline-flex !important;
    appearance: none;
    -webkit-appearance: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    width: 46px;
    height: 46px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #fff;
    color: var(--ink);
    box-shadow: 0 10px 24px rgba(72,50,130,.08);
  }
  .menu-toggle span {
    display: block !important;
    width: 21px;
    height: 2px;
    border-radius: 999px;
    background: var(--ink);
  }
  .mobile-menu[hidden] {
    display: none !important;
  }
  .mobile-menu:not([hidden]) {
    display: block !important;
  }
  .mobile-menu-inner {
    display: grid !important;
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 16px 0 20px;
  }
  .mobile-menu a {
    text-decoration: none !important;
    font-size: 18px;
    line-height: 1.2;
  }
}


/* v8: forced clean mobile nav and transparent portrait */
@media (max-width: 900px) {
  .links { display: none !important; }
  .menu-toggle { display: inline-flex !important; opacity: 1 !important; }
  .menu-toggle span { display: block !important; opacity: 1 !important; }
  .mobile-menu[hidden] { display: none !important; }
  .mobile-menu:not([hidden]) { display: block !important; }
}
.portrait-card { background: transparent !important; }
.portrait-card img { background: transparent !important; }


/* v10: selected custom icons + refined headings */
.card h3, .section h2, .page-hero h1, .hero h1 { letter-spacing: -0.012em; }
.icon.custom-icon { background: transparent; border-radius: 0; width: 58px; height: 58px; overflow: visible; }
.icon.custom-icon img { display:block; width:58px; height:58px; object-fit:contain; filter: drop-shadow(0 8px 12px rgba(72,50,130,.08)); }
.feature { align-items:flex-start; }
@media(max-width:520px){ .icon.custom-icon{width:52px;height:52px}.icon.custom-icon img{width:52px;height:52px} }


/* v11: three-card current projects section */
.project-grid .card { min-height: 188px; }
.project-grid .card h3 { font-size: 21px; }
@media (max-width: 1050px) and (min-width: 901px) {
  .project-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
  .project-grid .card { padding: 22px; }
  .project-grid .card h3 { font-size: 19px; }
}