.container {
  max-width: 900px;
  margin: 0 auto;
}
.container section {
  margin-bottom: 2.5rem;
}
.intro {
  position: relative;
  padding: 2.25rem;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(0, 122, 204, 0.08), rgba(0, 196, 255, 0.05));
  box-shadow: 0 5px 16px rgba(15, 76, 129, 0.07);
  overflow: hidden;
}
.intro::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(255, 255, 255, 0.28), transparent 62%);
  pointer-events: none;
}
.intro-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.intro-header h1 {
  margin: 0;
}
.intro-header .hall-of-fame-link {
  margin-left: auto;
  flex-shrink: 0;
  padding: 0.65rem 1.15rem;
  /* color: var(--link-color); */
  box-shadow: 0 5px 14px rgba(0, 122, 204, 0.16);
}
.intro-header .hall-of-fame-link:hover {
  box-shadow: 0 6px 16px rgba(0, 196, 255, 0.28);
}
.feature-grid { display: flex; flex-wrap: wrap; gap: 1rem; }
.feature-item {
  position: relative;
  flex: 1 1 280px;
  background: var(--card-background);
  color: var(--text-color);
  padding: 1.25rem;
  border-radius: 14px;
  box-shadow: 0 2px 8px rgba(15, 76, 129, 0.08);
  overflow: hidden;
  border: 1px solid rgba(0, 122, 204, 0.1);
}

.feature-item h3 {
  color: var(--primary-color);
}
.note { margin-top: 1rem; font-style: italic; }
.vision {
  margin-top: 1.5rem;
  padding: 0 0.25rem;
}
.team {
  margin-top: 1.5rem;
  padding: 0 0.25rem;
}
.team ul {
  margin-top: 1.25rem;
  margin-bottom: 0;
  padding-left: 1.2rem;
}
.team li {
  margin-bottom: 0.75rem;
  font-size: 1rem;
}
.team li:last-child { margin-bottom: 0; }
.team li::marker { color: var(--primary-color); }
.team strong { color: var(--primary-color); }

section h2 {
  position: relative;
  display: inline-block;
  margin-bottom: 1.4rem;
}
section h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.55rem;
  width: 52px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-gradient-end, #00aaff));
  opacity: 0.55;
}
.btn {
  background: var(--primary-color);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  text-decoration: none;
}
.btn:hover {
  background: var(--primary-gradient-end);
  color: #fff;
}
.github-button {
  margin-top: 1rem;   /* pushes the button a bit lower */
}
.contact {
  padding-bottom: 0.5rem;
}
body.dark-mode .intro {
  background: linear-gradient(135deg, rgba(0, 122, 204, 0.2), rgba(0, 196, 255, 0.12));
  box-shadow: 0 7px 20px rgba(0, 0, 0, 0.38);
}
body.dark-mode .feature-item {
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.32);
  border-color: rgba(0, 170, 255, 0.16);
}
body.dark-mode .intro-header .hall-of-fame-link {
  background: linear-gradient(135deg, rgba(0, 122, 204, 0.9), rgba(0, 196, 255, 0.72));
  color: #fff;
  border: 1px solid rgba(0, 196, 255, 0.45);
  box-shadow: 0 8px 22px rgba(0, 196, 255, 0.32);
}

body.dark-mode .intro-header .hall-of-fame-link:hover {
  box-shadow: 0 10px 26px rgba(0, 196, 255, 0.42);
}

body.dark-mode .btn {
  color: #fff;
}

body.dark-mode .github-button .btn {
  background: linear-gradient(135deg, rgba(0, 122, 204, 0.85), rgba(0, 196, 255, 0.68));
  border: 1px solid rgba(0, 196, 255, 0.38);
  box-shadow: 0 6px 18px rgba(0, 122, 204, 0.3);
}