/* ==========================================================================
   Rodion Podorozhny — faculty site
   Texas State palette: maroon #501214, old gold #8F7034
   Static, no JS, single stylesheet.
   ========================================================================== */

:root {
  --maroon: #501214;
  --maroon-dark: #3a0d0e;
  --gold: #8f7034;
  --gold-light: #c9a86a;
  --ink: #22252a;
  --ink-soft: #4a4f57;
  --paper: #faf8f5;
  --card: #ffffff;
  --line: #e4ded4;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}

a { color: var(--maroon); text-decoration: none; border-bottom: 1px solid rgba(80, 18, 20, 0.25); }
a:hover { color: var(--gold); border-bottom-color: var(--gold); }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--maroon); color: #fff; padding: 8px 14px; z-index: 99;
}
.skip-link:focus { left: 8px; }

/* ---------- top navigation ---------- */
.topnav {
  position: sticky; top: 0; z-index: 50;
  background: var(--maroon);
  border-bottom: 3px solid var(--gold);
}
.topnav .inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; flex-wrap: wrap; gap: 4px 18px;
  min-height: 52px;
}
.topnav .brand {
  color: #fff; font-weight: 600; letter-spacing: 0.02em;
  border: none; margin-right: auto; padding: 10px 0;
}
.topnav a.navlink {
  color: #f3e9db; border: none; font-size: 15px; padding: 10px 2px;
}
.topnav a.navlink:hover { color: var(--gold-light); }

/* ---------- hero ---------- */
.hero { background: linear-gradient(180deg, #fff 0%, var(--paper) 100%); border-bottom: 1px solid var(--line); }
.hero .inner {
  max-width: var(--maxw); margin: 0 auto; padding: 42px 20px 34px;
  display: grid; grid-template-columns: 190px 1fr; gap: 34px; align-items: center;
}
.hero img.portrait {
  width: 190px; height: 190px; object-fit: cover; object-position: center top;
  border-radius: 50%; border: 4px solid var(--maroon);
  box-shadow: 0 6px 18px rgba(58, 13, 14, 0.25);
}
.hero h1 { margin: 0 0 4px; font-size: 34px; color: var(--maroon-dark); line-height: 1.2; }
.hero .role { margin: 0 0 12px; font-size: 19px; color: var(--ink-soft); }
.hero .role strong { color: var(--gold); font-weight: 600; }
.hero .quick {
  display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; padding: 0; list-style: none;
}
.hero .quick a {
  display: inline-block; padding: 7px 14px; border: 1.5px solid var(--maroon);
  border-radius: 999px; font-size: 14.5px; font-weight: 600;
}
.hero .quick a:hover { background: var(--maroon); color: #fff; }

/* ---------- sections ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 10px 20px 40px; }

section { margin: 38px 0; }
section > h2 {
  font-size: 24px; color: var(--maroon-dark); margin: 0 0 18px;
  padding-bottom: 8px; border-bottom: 2px solid var(--gold);
}

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 20px 24px; box-shadow: 0 2px 6px rgba(34, 37, 42, 0.05);
}

/* research area grid */
.areas { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.areas .card h3 { margin: 0 0 8px; font-size: 18px; color: var(--maroon); }
.areas .card p { margin: 0; font-size: 15.5px; color: var(--ink-soft); }

/* polyquantum feature */
.feature { display: grid; grid-template-columns: 1.1fr 1fr; gap: 20px; align-items: start; }
.feature figure { margin: 0; }
.feature img { width: 100%; border-radius: 10px; border: 1px solid var(--line); display: block; }
.feature figcaption { font-size: 13.5px; color: var(--ink-soft); margin-top: 6px; }

/* publications */
.pubs { list-style: none; margin: 0; padding: 0; }
.pubs li {
  padding: 13px 0 13px 18px; border-left: 3px solid var(--gold-light);
  margin-bottom: 10px; background: var(--card); border-radius: 0 8px 8px 0;
  border-top: 1px solid var(--line); border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line); padding-right: 16px;
  font-size: 15.5px;
}
.pubs .venue { color: var(--gold); font-weight: 600; }
.pubs .authors { color: var(--ink-soft); }

/* teaching table */
.courses { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 24px; padding: 0; list-style: none; margin: 0; }
.courses li { padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 15.5px; }
.courses .cno { font-weight: 700; color: var(--maroon); margin-right: 6px; }

/* news list */
.news { list-style: none; margin: 0; padding: 0; }
.news li { display: grid; grid-template-columns: 96px 1fr; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15.5px; }
.news .date { color: var(--gold); font-weight: 700; white-space: nowrap; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-grid .card h3 { margin: 0 0 10px; font-size: 17px; color: var(--maroon); }
.contact-grid .card p { margin: 4px 0; font-size: 15.5px; }

/* footer */
footer {
  background: var(--maroon-dark); color: #d9cbb8;
  margin-top: 30px; font-size: 14px;
}
footer .inner { max-width: var(--maxw); margin: 0 auto; padding: 22px 20px; }
footer a { color: var(--gold-light); border-bottom-color: rgba(201, 168, 106, 0.4); }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .hero .inner { grid-template-columns: 1fr; text-align: center; }
  .hero img.portrait { margin: 0 auto; }
  .hero .quick { justify-content: center; }
  .areas, .feature, .contact-grid, .courses { grid-template-columns: 1fr; }
  .news li { grid-template-columns: 1fr; gap: 2px; }
}