/* --- GENEL SIFIRLAMA --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
    list-style: none;
    text-decoration: none;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #050505;
    color: #e0e0e0;
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- ARKA PLANLAR --- */
.ana-sayfa-bg, .giris-bolumu {
    background: linear-gradient(rgba(0,0,0,0.6), #050505), url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80');
    background-size: cover; background-position: center; background-attachment: fixed;
}
.hakkimda-bg {
    background: linear-gradient(rgba(0,0,0,0.8), #050505), url('https://images.unsplash.com/photo-1532094349884-543bc11b234d?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80');
    background-size: cover; background-position: center; background-attachment: fixed;
    min-height: 100vh;
}
.kesfet-bg { background-color: #0a0a0a; min-height: 100vh; }

/* --- HEADER --- */
#ust-menu {
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    position: sticky; top: 0; z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    height: 80px; width: 100%;
}

.cerceve { max-width: 1200px; margin: 0 auto; padding: 0 20px; height: 100%; }

/* Sadece Header İçindeki İçerik Yan Yana */
.header-icerik { display: flex; justify-content: space-between; align-items: center; }

.logo { font-size: 1.8rem; font-weight: 700; color: #fff; z-index: 1001; }
.logo span { color: #888; font-weight: 300; }

.masaustu-menu ul { display: flex; gap: 15px; }

.menu-butonu {
    color: #bbb; font-weight: 700; /* İSTEK: KALIN YAZI */
    padding: 10px 25px;
    border: 1px solid rgba(255, 255, 255, 0.2); 
    border-radius: 50px; transition: 0.4s; font-size: 0.9rem;
}
.menu-butonu:hover, .menu-butonu.aktif { background: #fff; color: #000; box-shadow: 0 0 20px rgba(255, 255, 255, 0.4); }

/* --- MOBİL MENÜ --- */
.hamburger-ikonu { display: none; font-size: 1.8rem; color: #fff; cursor: pointer; }

.mobil-menu-kapsayici {
    position: fixed; top: 0; right: -100%; width: 280px; height: 100vh;
    background-color: #111; z-index: 2000;
    display: flex; flex-direction: column; align-items: flex-start; justify-content: flex-start;
    padding-top: 100px; padding-left: 30px;
    transition: 0.4s ease-in-out; box-shadow: -5px 0 30px rgba(0,0,0,0.8); border-left: 1px solid #333;
}
.mobil-menu-kapsayici.acik { right: 0; }

.mobil-menu-kapsayici ul { display: flex; flex-direction: column; gap: 20px; width: 100%; }
.mobil-menu-kapsayici a {
    color: #fff; font-size: 1.2rem; font-weight: 600;
    transition: 0.3s; display: block; border-bottom: 1px solid #333; padding-bottom: 10px; width: 80%;
}
.mobil-menu-kapsayici a:hover { color: #007bff; padding-left: 10px; }
.kapat-ikonu { position: absolute; top: 25px; right: 25px; font-size: 1.8rem; color: #fff; cursor: pointer; }

/* --- HERO --- */
.giris-bolumu { height: 90vh; display: flex; justify-content: center; align-items: center; text-align: center; }
.giris-icerik { padding: 0 20px; }
.giris-icerik h1 { font-size: 4rem; color: #fff; margin-bottom: 20px; line-height: 1.2; }
.giris-icerik p { font-size: 1.3rem; color: #ccc; max-width: 600px; margin: 0 auto 40px auto; }
.baslama-butonu {
    padding: 15px 45px; color: #fff; border: 2px solid #fff; font-weight: 700;
    text-transform: uppercase; border-radius: 50px; transition: 0.4s; letter-spacing: 1px; display: inline-block;
}
.baslama-butonu:hover { background: #fff; color: #000; box-shadow: 0 0 30px #fff; }

/* --- KEŞFET İÇERİK --- */
/* Burada 'block' kullanarak kartların yan yana dizilmesini sağlıyoruz */
main.ana-icerik { display: block; padding-top: 50px; }

.bolum-basligi { text-align: center; margin-bottom: 40px; width: 100%; }
.bolum-basligi h2 { font-size: 3rem; color: #fff; }

.filtre-alani { display: flex; justify-content: center; gap: 10px; margin-bottom: 50px; flex-wrap: wrap; width: 100%; }
.filtre-tus {
    padding: 8px 25px; border: 1px solid #333; background: #111; color: #aaa;
    border-radius: 50px; cursor: pointer; transition: 0.3s; font-size: 0.9rem; 
    font-weight: 700; /* İSTEK: KALIN YAZI */
}
.filtre-tus:hover, .filtre-tus.aktif { background: #fff; color: #000; border-color: #fff; }

/* KART GRID SİSTEMİ */
.kart-tasiyici {
    display: grid;
    /* Kartları otomatik sığdır */
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); 
    gap: 30px; padding-bottom: 80px; width: 100%;
}
.bilgi-karti {
    background: #121212; border: 1px solid #2a2a2a; border-radius: 30px;
    overflow: hidden; transition: 0.4s; cursor: pointer; display: flex; flex-direction: column;
}
.bilgi-karti:hover { transform: translateY(-10px); border-color: #666; }
.kart-resim { height: 250px; width: 100%; filter: grayscale(100%); transition: 0.5s; }
.bilgi-karti:hover .kart-resim { filter: grayscale(0%); }
.kart-resim img { width: 100%; height: 100%; object-fit: cover; }
.kart-bilgi { padding: 25px; text-align: center; }
.kart-bilgi h3 { color: #fff; font-size: 1.4rem; margin-bottom: 5px; }
.etiket { color: #888; font-size: 0.8rem; text-transform: uppercase; }

/* --- HAKKIMDA (DÜZELTİLMİŞ) --- */
.hakkimda-kapsayici { 
    display: flex !important; /* Blok değil Flex zorunlu */
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    min-height: calc(100vh - 80px) !important;
    padding-top: 0 !important;
    margin-top: 0 !important;
}

/* İSTEK: SABİT BEYAZ GLOW KENARLIKLI KUTU */
.cam-kutu {
    position: relative;
    background: rgba(0, 0, 0, 0.7); 
    backdrop-filter: blur(20px); 
    padding: 60px;
    border-radius: 30px; 
    max-width: 800px; text-align: center; width: 90%;
    
    border: 2px solid #ffffff; 
    box-shadow: 
        0 0 25px rgba(255, 255, 255, 0.5),
        inset 0 0 15px rgba(255, 255, 255, 0.2);
}

/* --- POPUP (MODAL) --- */
.galeri-kapali { display: none; }
.galeri-acik {
    display: flex; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.9); z-index: 2000; align-items: center; justify-content: center;
}
.galeri-kapsayici { position: relative; width: 100%; max-width: 900px; display: flex; align-items: center; justify-content: center; padding: 20px; }
.galeri-icerik {
    display: flex; width: 100%; height: 500px; background: #1a1a1a;
    border-radius: 30px; overflow: hidden; border: 1px solid #444;
}
.galeri-resim-alani { flex: 1; }
.galeri-resim-alani img { width: 100%; height: 100%; object-fit: cover; }
.galeri-yazi-alani { flex: 1; padding: 40px; display: flex; flex-direction: column; justify-content: center; overflow-y: auto; }
.galeri-yazi-alani h2 { font-size: 2.2rem; color: #fff; margin-bottom: 10px; }
.kapat-tusu { position: absolute; top: -50px; right: 20px; color: #fff; font-size: 35px; cursor: pointer; }
.nav-tus {
    font-size: 1.5rem; color: #fff; cursor: pointer; background: rgba(255,255,255,0.1);
    width: 45px; height: 45px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    position: absolute; z-index: 2005;
}
.sol-tus { left: -10px; }
.sag-tus { right: -10px; }

/* Footer */
footer { text-align: center; padding: 20px; color: #666; font-size: 0.8rem; margin-top: auto; }

/* --- RESPONSIVE (MOBİL) --- */
@media (max-width: 768px) {
    .masaustu-menu { display: none; }
    .hamburger-ikonu { display: block; }
    
    .giris-icerik h1 { font-size: 2.5rem; margin-bottom: 15px; }
    .giris-icerik p { font-size: 1rem; }
    .bolum-basligi h2 { font-size: 2rem; }
    
    /* Mobilde kartlar tek sütun */
    .kart-tasiyici { grid-template-columns: 1fr; } 
    
    /* Hakkımda Düzeltmesi */
    .hakkimda-kapsayici { padding: 20px !important; }
    .cam-kutu { padding: 40px 20px; }
    
    /* Galeri Düzeltmesi */
    .galeri-icerik { flex-direction: column; height: 75vh; width: 100%; }
    .galeri-resim-alani { height: 250px; flex: none; }
    .galeri-yazi-alani { padding: 20px; flex: 1; }
    .galeri-yazi-alani h2 { font-size: 1.5rem; }
    .kapat-tusu { top: -45px; right: 10px; }
    .nav-tus { width: 40px; height: 40px; background: rgba(0,0,0,0.8); }
    .sol-tus { left: 0; }
    .sag-tus { right: 0; }
}