:root {
  --blue: #0EA5E9;
  --dark: #111;
  --gray: #f5f5f5;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #333;
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: white;
  box-shadow: 0 1px 10px rgba(0,0,0,.05);
}

.container {
  max-width: 1200px;
  margin: auto;
  padding: 15px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero {
  padding: 140px 20px;
  text-align: center;
  background: var(--gray);
}

.btn {
  background: var(--blue);
  color: white;
  padding: 14px 28px;
  border-radius: 30px;
  text-decoration: none;
}

.section {
  padding: 80px 20px;
  max-width: 1200px;
  margin: auto;
}

.gray { background: var(--gray); }
.dark { background: var(--dark); color: white; }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.whatsapp {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #25d366;
  color: white;
  padding: 15px 22px;
  border-radius: 50px;
  text-decoration: none;
}