* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  color: #111;
  background: #fff;
  line-height: 1.6;
}

.hero {
  height: 90vh;
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero .overlay {
  color: #fff;
  padding: 40px;
}

.hero h1 {
  font-size: 56px;
  letter-spacing: 2px;
}

@media (max-width: 768px) {
  .hero-logo {
    width: 180px;
  }

  .hero h1 {
    font-size: 38px;
  }
}
.tagline {
  font-size: 20px;
  margin-top: 10px;
}

.sub {
  font-size: 16px;
  margin-top: 20px;
  opacity: 0.85;
}

.section {
  padding: 80px 10%;
}

.section.dark {
  background: #f4f4f4;
}

.section h2 {
  font-size: 32px;
  margin-bottom: 20px;
}

.section p {
  max-width: 800px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 25px;
}

.card {
  background: #fff;
  padding: 25px;
  border-left: 4px solid #2c5364;
}

.card h3 {
  margin-bottom: 10px;
}

.vision {
  list-style: none;
}

.vision li {
  margin-bottom: 10px;
  padding-left: 20px;
  position: relative;
}

.vision li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: #2c5364;
  font-size: 20px;
}

a {
  color: #2c5364;
  text-decoration: none;
}

footer {
  background: #111;
  color: #fff;
  text-align: center;
  padding: 30px 10%;
  font-size: 14px;
}

.hero-logo {
  max-height: 220px;   /* Logo hiçbir zaman bundan büyük olmaz */
  width: auto;
  max-width: 80%;
  margin-bottom: 25px;
  filter: drop-shadow(0 8px 20px rgba(0,0,0,0.6));
}