/* Reset body and apply gradient background */
body {
  margin: 0;
  font-family: "Roboto", sans-serif;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navbar Styling */
.main-header .navbar {
  background-color: rgba(0, 0, 0, 0.8);
  padding: 1rem 2rem;
}

.navbar-brand {
  font-family: "Orbitron", sans-serif;
  font-size: 1.6rem;
  color: #fff;
}

.navbar-nav .nav-link {
  color: #ccc;
  margin-left: 1rem;
  transition: all 0.3s ease-in-out;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: #fff;
  border-bottom: 2px solid #00ffcc;
}

/* Hero Section Styling */
.hero-section {
  flex-grow: 1;
  display: flex;
  align-items: center;
  padding: 3rem 1rem;
  text-align: center;
}

.hero-section h1 {
  font-family: "Orbitron", sans-serif;
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: #ffffff;
}

.hero-section p {
  font-size: 1.2rem;
  color: #d9d9d9;
}

/* Chessboard Centering */
#chesscard {
  margin-top: 2rem;
  overflow-x: auto;
}

/* Chessboard Styling */
.p4wn-board table {
  border-spacing: 1px;
}

.p4wn-board td {
  padding: 1px;
}

.p4wn-white-square {
  background-color: #f5f5dc;
}

.p4wn-black-square {
  background-color: #3e3e3e;
}

.p4wn-board {
  float: left;
  max-width: 100%;
}

.p4wn-log {
  font-family: "Roboto", sans-serif;
  white-space: pre;
  font-size: smaller;
  overflow: auto;
  max-width: 14em;
  height: 90%;
}

.p4wn-control-button,
.p4wn-log-move {
  background-color: #00ffcc;
  color: #000;
  padding: 6px 10px;
  margin: 3px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  border: none;
}

@media only screen and (max-width: 768px) {
  .hero-section h1 {
    font-size: 2rem;
  }

  .navbar-brand {
    font-size: 1.3rem;
  }
}