/* RoadLab — landing. Colors from the official GRF site (web1.grf.bg.ac.rs):
   navy #233c6e (primary), crimson #9f1c20 (accent). Background = the faculty
   site's faint structural diagram. Plain CSS, no build step. */
:root {
  --navy: #233c6e;
  --crimson: #9f1c20;
  --ink: #333a45;
  --muted: #6a7078;
  --paper: #f5f6f7;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--ink);
  background-color: var(--paper);
  background-image: url("background.jpg");
  background-repeat: no-repeat;
  background-position: center 40%;
  background-size: min(1150px, 94vw);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 24px;
}

.grb {
  width: 88px;
  height: auto;
  margin-bottom: 26px;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, .12));
}

h1 {
  margin: 0;
  max-width: 16ch;
  color: var(--navy);
  font-size: clamp(1.7rem, 4.6vw, 2.9rem);
  font-weight: 700;
  letter-spacing: -.4px;
  line-height: 1.15;
}

.rule {
  display: block;
  width: 60px;
  height: 3px;
  margin: 26px auto;
  border-radius: 2px;
  background: var(--crimson);
}

.inst {
  margin: 0 0 6px;
  color: var(--navy);
  font-weight: 600;
  font-size: clamp(1rem, 2.4vw, 1.3rem);
}

.fac {
  margin: 0;
  color: var(--muted);
  font-size: clamp(.95rem, 2.2vw, 1.15rem);
}

.btn {
  display: inline-block;
  margin-top: 32px;
  padding: 12px 26px;
  border-radius: 999px;
  background: var(--navy);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: background .15s ease, transform .08s ease;
}
.btn:hover { background: var(--crimson); }
.btn:active { transform: translateY(1px); }

.byline {
  padding: 20px 24px 30px;
  text-align: center;
  border-top: 1px solid rgba(35, 60, 110, .12);
  background: rgba(245, 246, 247, .72);
}

.byline a {
  color: var(--navy);
  text-decoration: none;
  font-size: .95rem;
}
.byline a:hover { color: var(--crimson); text-decoration: underline; }