body {
    margin:0; padding:0;
    font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color:#fff;
    background: linear-gradient(135deg,#0b3d2e,#003366);
    overflow-x:hidden;
    position:relative;
}
#molecule-canvas {
    position:fixed;
    top:0; left:0;
    width:100%; height:100%;
    z-index:0;
    pointer-events:none;
}
header {
    text-align:center;
    padding:1rem;
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(10px);
    z-index:10;
}
header h1 {color:gold; margin:0;}
section.glass {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(15px) saturate(200%);
    border-radius:16px;
    padding:2rem;
    margin:2rem auto;
    max-width:800px;
    box-shadow:0 8px 32px rgba(0,0,0,0.2);
    position:relative;
    z-index:5;
}
button.btn, a.btn {
    background: rgba(255,215,0,0.2);
    color:#fff;
    border:1px solid rgba(255,215,0,0.5);
    border-radius:8px;
    padding:0.5rem 1rem;
    cursor:pointer;
    text-decoration:none;
    transition:0.3s;
}
button.btn:hover, a.btn:hover { background: rgba(255,215,0,0.4); }
.flashes li {padding:0.5rem; margin-bottom:0.5rem; border-radius:8px;}
.flashes li.error {background:#f44;}
.flashes li.success {background:#4f4;}
@media(max-width:768px){
    section.glass { margin:1rem; padding:1.5rem; }
}



/* Responsive containers */
.container {
  max-width:1100px;
  margin:0 auto;
  padding:1rem;
}

/* Button layout - wrap and spacing */
.btn {
  display:inline-block;
  margin:0.5rem;
  white-space:normal;
  word-break:break-word;
  box-sizing:border-box;
}

/* Expertise buttons container */
.btn-row {
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:0.5rem;
}

/* Small molecule canvases inside sheets */
.molecule-canvas {
  width:100%;
  height:160px;
  display:block;
  background:transparent;
  pointer-events:none;
  margin:0.5rem 0 1rem 0;
}

/* Footer pinned to bottom on short pages */
footer {
  position:fixed;
  bottom:0;
  left:0;
  width:100%;
  text-align:center;
  padding:0.9rem 0;
  z-index:3000;
  background: rgba(0,0,0,0.25);
}
body { padding-bottom: 64px; } /* reserve space for sticky footer */

/* Center the external links block */
.center-links {
  text-align:center;
  margin:2rem 0;
}

/* Improve readability on mobile */
@media (max-width:768px){
  header h1 { font-size:1.4rem; padding:0.6rem; text-align:center; }
  .glass { padding:1rem; margin:0.75rem; border-radius:10px; }
  .molecule-canvas { height:120px; }
}




/* Expertise accordion / items */
.expert-list { margin-top:1rem; }
.expert-item { border:1px solid rgba(255,255,255,0.06); border-radius:8px; margin-bottom:0.75rem; overflow:hidden; }
.expert-toggle {
  width:100%;
  text-align:left;
  padding:0.8rem 1rem;
  background:transparent;
  border:none;
  color:inherit;
  font-weight:600;
  cursor:pointer;
}
.expert-body { padding:0 1rem 1rem 1rem; display:block; }
@media (max-width:768px){
  /* collapse bodies by default on mobile */
  .expert-body { display:none; }
  .expert-toggle[aria-expanded="true"] + .expert-body { display:block; }
}



/* Navigation */
.site-header { position:sticky; top:0; z-index:4000; backdrop-filter: blur(6px); background: rgba(0,0,0,0.25); }
.nav-inner { display:flex; align-items:center; justify-content:space-between; padding:0.5rem 1rem; }
.brand { font-weight:700; font-size:1.1rem; color: #ffd700; text-decoration:none; }
.main-nav a { color: #fff; margin-left:0.8rem; text-decoration:none; padding:0.4rem; }
#nav-toggle { display:none; background:transparent; border:none; color:#fff; font-size:1.2rem; }
@media (max-width:768px){
  #nav-toggle { display:block; }
  .main-nav { display:none; position:absolute; left:0; right:0; top:56px; background: rgba(0,0,0,0.6); padding:1rem; flex-direction:column; }
  .main-nav a { margin:0.4rem 0; }
  .main-nav.open { display:flex; }
}

/* Glass card sharpness */
.glass { background: rgba(255,255,255,0.04); border:1px solid rgba(255,255,255,0.06); box-shadow: 0 8px 18px rgba(0,0,0,0.45); backdrop-filter: blur(6px); }

/* Full-page molecule canvas */
#page-molecule-canvas { position:fixed; top:0; left:0; width:100%; height:100%; z-index:0; pointer-events:none; }
.page-content { position:relative; z-index:5; padding-top:1rem; padding-bottom:4rem; }