/* Academic Classic theme — professional & easy to navigate */
:root {
  --bg: #ffffff;
  --ink: #111827;
  --muted: #6b7280;
  --brand: #05296b; /* IBM Blue */
  --accent: #10b981; /* Emerald */
  --panel: #f7fafc;
  --border: #e5e7eb;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(2,8,20,0.08);
  --sans: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--sans); color: var(--ink); background: var(--bg);
  line-height: 1.6;
}

.container { width: min(1100px, 92vw); margin: 0 auto; }

/* Top navigation */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.85);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.navbar-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 800; letter-spacing: 0.3px; display:flex; align-items:center; gap:10px; }
.brand img { width: 36px; height: 36px; border-radius: 50%; }
.nav-links { display: flex; gap: 20px; }
.nav-links a { text-decoration: none; color: var(--ink); font-weight: 600; opacity: .85; }
.nav-links a.active, .nav-links a:hover { color: var(--brand); opacity: 1; }

/* Hero section with banner & portrait */
.hero { position: relative; }
.hero .banner {
  width: 100%; height: 80px; border-bottom: None;
  background: url('../assets/img/banner.svg') center/cover no-repeat fixed;
}
.hero .profile {
  position: relative; transform: translateY(-60px);
}
.hero .profile .card {
  display: flex; align-items: center; gap: 22px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px 20px;
}
.hero .portrait {
  width: 120px; height: 120px; border-radius: 50%;
  border: 6px solid #fff; box-shadow: 0 8px 26px rgba(0,0,0,.15);
  background: #f3f4f6; overflow: hidden;
}
.hero h1 { margin: 0; font-size: clamp(1.6rem, 2.2vw + 1rem, 2.4rem); }
.hero .roles { color: var(--muted); margin-top: 4px; }

.icons { display: flex; gap: 10px; flex-wrap: wrap; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border);
  background: #fff; box-shadow: var(--shadow);
}
.icon-btn:hover { border-color: #c7d2fe; }

/* Section blocks */
.section { padding: 16px 0 38px; }
.section h2 { margin: 0 0 6px; font-size: 1.5rem; }
.section .lead { color: var(--muted); margin-top: 0; }

.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.grid-2 { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; }
.grid-3 { display: grid; gap: 16px; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr; } .grid-2 { grid-template-columns: 1fr; } }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); font-size: .8rem; color: var(--muted); }

/* Publications list */
.controls { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0 14px; }
.controls input[type="search"] { padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); width: min(380px, 100%); }
.controls .chip { padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border); cursor: pointer; }
.controls .chip.active { background: #eef2ff; border-color: #c7d2fe; color: #3730a3; }
.pub-item { display: grid; gap: 8px; grid-template-columns: 1fr auto; align-items: start; }
.pub-item + .pub-item { border-top: 1px dashed var(--border); margin-top: 12px; padding-top: 12px; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 14px; border-radius: 10px; border: 1px solid var(--border); background: #fff; font-weight: 700; text-decoration: none; color: var(--ink); }
.btn.primary { background: var(--brand); color: #fff; border: none; }
.btn:hover { opacity: .95; }
.muted { color: var(--muted); }
.small { font-size: .92rem; }

footer { padding: 36px 0; color: var(--muted); }
footer .footer-grid { display: grid; gap: 16px; grid-template-columns: 2fr 1fr 1fr; }
@media (max-width: 800px) { footer .footer-grid { grid-template-columns: 1fr; } }

/* Back-to-top */
#backToTop {
  position: fixed; right: 18px; bottom: 18px; display: none;
  width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border);
  background: #fff; box-shadow: var(--shadow); align-items: center; justify-content: center;
}
#backToTop.show { display: flex; }


/* ===== Turned Network Banner (added) ===== */
.grid-1 {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}