/* Temel sıfırlama */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Gövde */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: url('images/bg.jpg') no-repeat center center fixed;
  background-size: cover;
  color: #f4f4f4;
  position: relative;
}

/* Saydamlık efekti */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.65);
  z-index: -1;
}

/* Genel konteyner */
.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
  padding: 20px;
}

/* Header */
header {
  background-color: #111;
  color: white;
  padding: 20px 0;
  border-bottom: 3px solid #e50914;
}

header h1 {
  font-size: 28px;
  color: #e50914;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

nav a {
  color: #f4f4f4;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s;
}

nav a:hover {
  color: #e50914;
}

/* Hero */
.hero {
  height: 500px;
  display: flex;
  align-items: center;
  text-align: center;
  color: white;
  padding: 0 20px;
}

.hero .container {
  background-color: rgba(0, 0, 0, 0.5);
  padding: 30px;
  border-radius: 10px;
}

.hero-title {
  font-size: 38px;
  margin-bottom: 20px;
  text-shadow: 2px 2px 5px #000;
}

.hero p {
  font-size: 18px;
  margin-bottom: 30px;
  text-shadow: 1px 1px 3px #000;
}

/* Buton */
.btn {
  background-color: #e50914;
  color: white;
  padding: 12px 25px;
  text-decoration: none;
  border-radius: 4px;
  font-weight: bold;
  transition: background-color 0.3s;
  cursor: pointer;
}

.btn:hover {
  background-color: #b40610;
}

/* Ürün Grupları Kutuları */
.urun-gruplari {
  padding: 60px 0;
  display: none;
}

.urun-gruplari.aktif {
  display: block;
}

.urun-kartlar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

/* Ürün Kart */
.urun-kart {
  background-color: white;
  color: #000;
  border-radius: 8px;
  padding: 15px;
  box-shadow: 0 0 10px rgba(0,0,0,0.15);
  text-align: center;
  transition: transform 0.3s ease;
}

.urun-kart:hover {
  transform: scale(1.03);
}

.urun-kart img {
  max-width: 100%;
  height: auto;
  margin-bottom: 10px;
}

.urun-kart h3 {
  font-size: 18px;
  font-weight: bold;
}

/* NEDEN GNC PLAST */
.neden-gnc {
  background-color: rgba(0, 0, 0, 0.65);
  color: white;
  padding: 100px 0;
  text-align: center;
  margin-top: 100px;
}

.neden-title {
  font-family: 'Bebas Neue', cursive;
  font-size: 52px;
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.neden-subtitle {
  font-family: 'Dancing Script', cursive;
  font-size: 20px;
  margin-bottom: 40px;
}

.neden-boxes {
  display: flex;
  flex-wrap: wrap;
  gap: 25px;
  justify-content: center;
}

.neden-box {
  background-color: #1a1a1a;
  padding: 20px;
  border-radius: 8px;
  width: 250px;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.05);
}

.neden-box h3 {
  color: #e50914;
  margin-bottom: 10px;
}

.neden-box p {
  color: #ddd;
  font-size: 15px;
}

/* Footer */
footer {
  background-color: #111;
  color: #999;
  text-align: center;
  padding: 20px 0;
  border-top: 2px solid #e50914;
}

/* Logo */
.logo {
  height: 45px;
  width: auto;
}

/* Slogan */
.brand-slogan {
  font-weight: bold;
  font-size: 14px;
  color: #f4f4f4;
}

.brand-tags {
  font-size: 12px;
  color: #aaa;
}