:root {
  --font-family: 'Poppins', sans-serif;
  --text-color: #1e293b;
  --hero-gradient-start: #1e3a8a;
  --hero-gradient-end: #4b61a2;
  --background: #f8fafc;
  --primary-color: #1e3a8a;
  --button-hover-bg: #1e40af;
  --link-color: #64748B;
  --max-width: 800px;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  color: var(--text-color);
}

a {
  color: var(--link-color);
  text-decoration: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(var(--hero-gradient-start), var(--hero-gradient-end));
  text-align: center;
  color: #22d3ee;
}

.hero h1 {
  font-size: 3rem;
  margin: 0;
}

.hero .subtitle {
  margin-top: 0.5rem;
  font-size: 1.25rem;
}

.about {
  background: var(--background);
  padding: 2rem 0;
}

.about-grid {
  display: grid;
  gap: 2rem;
}

.about-text {
  font-size: 1rem;
  line-height: 1.6;
}

.about-photo img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
}

.pledge {
  background: var(--background);
  padding: 2rem 1rem;
  text-align: center;
}

.social-links {
  background: var(--background);
  padding: 2rem 1rem;
  text-align: center;
}

.social-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background: var(--primary-color);
  color: #fff;
  border-radius: 999px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.btn:hover {
  background: var(--button-hover-bg);
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}