/* GENEL AYARLAR VE LÜKS PALET */
:root {
    --gold: #D4AF37;
    --gold-koyu: #b5952f;
    --siyah: #050505;
    --koyu-gri: #121212;
    --kutu-bg: #1a1a1a;
    --yazi-acik: #e0e0e0;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { background-color: var(--siyah); color: var(--yazi-acik); font-family: 'Montserrat', sans-serif; overflow-x: hidden; }
h1, h2, h3, h4 { font-family: 'Playfair Display', serif; color: #fff; font-weight: 600; }

/* HEADER */
#alvera-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 50px; background: rgba(5,5,5,0.9); border-bottom: 1px solid rgba(212,175,55,0.2); position: fixed; width: 100%; z-index: 100; backdrop-filter: blur(10px); }
.logo { font-family: 'Playfair Display', serif; font-size: 1.5rem; font-weight: 800; color: var(--gold); letter-spacing: 2px; }
.logo span { color: #fff; font-family: 'Montserrat', sans-serif; font-size: 1rem; font-weight: 300; letter-spacing: 5px; }
nav a { color: #ccc; text-decoration: none; margin: 0 15px; font-size: 0.9rem; transition: 0.3s; }
nav a:hover { color: var(--gold); }

/* BUTONLAR */
.btn-gold-outline { border: 1px solid var(--gold); color: var(--gold); padding: 10px 20px; text-decoration: none; border-radius: 5px; transition: 0.3s; }
.btn-gold-outline:hover { background: rgba(212,175,55,0.1); }
.btn-gold-solid { background: var(--gold); color: #000; padding: 12px 25px; border: none; border-radius: 5px; font-weight: 600; cursor: pointer; transition: 0.3s; }
.btn-gold-solid:hover { background: var(--gold-koyu); box-shadow: 0 0 15px rgba(212,175,55,0.3); }

/* ORTAK SEKSİYON YAPISI */
section { padding: 100px 50px; }
.seksiyon-baslik { margin-bottom: 40px; }
.merkez { text-align: center; }
.kucuk-baslik { color: var(--gold); font-size: 0.8rem; letter-spacing: 3px; text-transform: uppercase; }
.seksiyon-baslik h2 { font-size: 2.5rem; margin-top: 10px; }

/* HERO (KARŞILAMA) */
.hero-section { display: flex; align-items: center; justify-content: space-between; min-height: 100vh; background: radial-gradient(circle at 30% 50%, #151515 0%, var(--siyah) 100%); padding-top: 150px; }
.hero-sol { max-width: 600px; }
.hero-sol h1 { font-size: 4rem; line-height: 1.1; margin: 20px 0; }
.hero-sol h1 span { color: var(--gold); }
.hero-sol p { font-size: 1.1rem; color: #aaa; margin-bottom: 30px; line-height: 1.6; }
.hero-rozetler span { display: inline-block; margin-right: 20px; font-size: 0.9rem; color: #888; }
.hero-rozetler i { color: var(--gold); }
.hero-sag { flex: 1; display: flex; justify-content: flex-end; }
.hizli-form-kutusu { background: rgba(26,26,26,0.6); border: 1px solid rgba(212,175,55,0.2); padding: 40px; border-radius: 15px; width: 100%; max-width: 400px; backdrop-filter: blur(10px); }
.hizli-form-kutusu form { display: flex; flex-direction: column; gap: 15px; margin-top: 20px; }
.hizli-form-kutusu input { padding: 15px; background: #111; border: 1px solid #333; color: #fff; border-radius: 5px; outline: none; }
.hizli-form-kutusu input:focus { border-color: var(--gold); }

/* PİYASA VERİLERİ */
.piyasa-verileri { background: var(--koyu-gri); border-top: 1px solid #222; border-bottom: 1px solid #222; }
.veri-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.veri-karti { background: var(--kutu-bg); padding: 30px; border-radius: 10px; text-align: center; border: 1px solid #2a2a2a; transition: 0.3s; }
.veri-karti:hover { border-color: var(--gold); transform: translateY(-5px); }
.veri-karti h3 { font-size: 2rem; color: var(--gold); margin-bottom: 10px; }

/* KATEGORİLER & PORTFÖY */
.kategori-grid, .ilan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; margin-top: 40px; }
.kat-karti { background: var(--kutu-bg); padding: 40px 30px; border-radius: 10px; text-align: center; border: 1px solid #222; }
.kat-karti i { font-size: 2.5rem; color: var(--gold); margin-bottom: 20px; }
.ilan-karti { background: var(--kutu-bg); border-radius: 10px; overflow: hidden; border: 1px solid #222; transition: 0.3s; }
.ilan-karti:hover { border-color: var(--gold); }
.ilan-karti img { width: 100%; height: 250px; object-fit: cover; }
.ilan-icerik { padding: 25px; position: relative; }
.ilan-durum { position: absolute; top: -15px; right: 20px; background: var(--gold); color: #000; padding: 5px 15px; font-size: 0.8rem; font-weight: bold; border-radius: 20px; }
.fiyat { font-size: 1.5rem; color: var(--gold); font-weight: bold; margin: 10px 0; }
.detay { font-size: 0.9rem; color: #888; }

/* ARAMA MOTORU */
.arama-motoru { display: flex; gap: 15px; background: var(--kutu-bg); padding: 15px; border-radius: 8px; border: 1px solid #333; }
.arama-motoru input, .arama-motoru select { flex: 1; padding: 15px; background: #111; border: 1px solid #222; color: #fff; border-radius: 5px; }

/* DEĞERLEME MOTORU */
.degerleme-alani { background: radial-gradient(circle at 50% 50%, #1a1a1a 0%, var(--siyah) 100%); }
.hesaplayici-kutu { display: flex; gap: 15px; max-width: 800px; margin: 0 auto; background: rgba(0,0,0,0.5); padding: 20px; border-radius: 10px; border: 1px solid var(--gold); }
.hesaplayici-kutu select, .hesaplayici-kutu input { flex: 1; padding: 15px; background: #111; border: 1px solid #333; color: #fff; border-radius: 5px; }

@media (max-width: 768px) {
    .hero-section { flex-direction: column; text-align: center; padding-top: 120px; }
    .hero-sag { margin-top: 50px; width: 100%; }
    .veri-grid, .hesaplayici-kutu, .arama-motoru { grid-template-columns: 1fr; flex-direction: column; }
    #alvera-header nav { display: none; }
}