/* ==========================================
   1. TEMEL AYARLAR VE DEĞİŞKENLER
   ========================================== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary-color: #1a1a1a;    /* Koyu Antrasit (Logo Gizleme Rengi) */
    --secondary-color: #D4AF37;  /* Altın Sarısı */
    --text-dark: #2c3e50;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --white: #FFFFFF;
}

body {
    font-family: 'Open Sans', sans-serif;
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.6;
    padding-top: 100px;
    scroll-behavior: smooth;
}

h1, h2, h3, h4 { font-family: 'Montserrat', sans-serif; }
a { text-decoration: none; }
.container { width: 85%; max-width: 1200px; margin: auto; }
.section-padding { padding: 90px 0; }
.bg-light { background-color: var(--bg-light); }

.section-title-block { text-align: center; margin-bottom: 60px; }
.section-title-block h2 { font-size: 36px; color: var(--primary-color); }
.section-title-block p { color: var(--text-light); margin-top: 10px; font-size: 16px; }
.heading-underline { width: 70px; height: 4px; background: var(--secondary-color); margin: 15px auto 0 auto; }

/* ==========================================
   2. NAVBAR VE LOGO ENTEGRASYONU
   ========================================== */
.navbar {
    position: fixed; top: 0; left: 0; width: 100%;
    background: var(--primary-color); /* Logodaki kareyi yutan koyu zemin */
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    z-index: 1000;
}
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 100px; }
.logo-container { display: flex; align-items: center; height: 100%; }
.brand-logo {
    height: 85px; /* Navbar yüksekliğimiz 100px, sınırları zorluyoruz */
    width: auto; 
    display: block; 
    object-fit: contain;
    /* Eğer etraftaki şeffaf boşluk çoksa, logoyu %80 daha büyütürüz */
    transform: scale(1.8); 
    /* Büyürken menüye taşmasın, sadece olduğu yerde soldan büyüsün */
    transform-origin: left center; 
}
.nav-links { display: flex; list-style: none; }
.nav-links li { margin-left: 35px; }
.nav-links a { color: #e2e8f0; font-weight: 600; font-size: 14px; text-transform: uppercase; transition: 0.3s; letter-spacing: 0.5px; }
.nav-links a:hover { color: var(--secondary-color); }
.hamburger { display: none; font-size: 26px; cursor: pointer; color: #fff; }

/* ==========================================
   3. HERO ALANI
   ========================================== */
.hero {
    position: relative; height: calc(100vh - 100px);
    background-size: cover; background-position: center;
    display: flex; align-items: center;
}
.hero-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to right, rgba(26, 26, 26, 0.9), rgba(26, 26, 26, 0.6));
    z-index: 1;
}
.hero-content { position: relative; z-index: 2; color: var(--white); max-width: 750px; }
.hero-content h1 { font-size: 56px; margin-bottom: 20px; line-height: 1.2; font-weight: 800; }
.hero-content p { font-size: 18px; margin-bottom: 40px; color: #cbd5e1; }
.hero-buttons { display: flex; gap: 20px; }

/* Butonlar */
.btn { padding: 16px 36px; font-weight: 600; border-radius: 4px; transition: 0.3s ease; font-family: 'Montserrat', sans-serif; text-transform: uppercase; font-size: 14px; cursor: pointer; display: inline-block; }
.btn-primary { background: var(--secondary-color); color: #1a1a1a; border: none; }
.btn-primary:hover { background: #fff; color: #1a1a1a; transform: translateY(-3px); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid var(--white); }
.btn-outline:hover { background: var(--secondary-color); color: #1a1a1a; border-color: var(--secondary-color); transform: translateY(-3px); }

/* ==========================================
   4. HİZMET GRİDLERİ (ARAÇ & İNŞAAT)
   ========================================== */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.service-box {
    background: var(--white); padding: 35px 30px; border-radius: 6px; 
    box-shadow: 0 10px 25px rgba(0,0,0,0.03); 
    border-top: 4px solid var(--secondary-color); transition: 0.3s ease;
}
.service-box:hover { transform: translateY(-5px); box-shadow: 0 15px 35px rgba(0,0,0,0.08); }
.service-box i { font-size: 32px; color: var(--secondary-color); margin-bottom: 20px; display: block; }
.service-box h3 { font-size: 19px; color: #1a1a1a; margin-bottom: 12px; }
.service-box p { font-size: 14px; color: var(--text-light); }

/* Süreç Alanı */
.process-section { background: #1e293b; }
.process-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; margin-top: 50px; text-align: center; }
.process-step { color: #fff; }
.step-number { width: 70px; height: 70px; background: var(--secondary-color); color: #1a1a1a; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 26px; font-weight: 800; margin: 0 auto 25px auto; }
.process-step h4 { font-size: 20px; margin-bottom: 12px; }
.process-step p { font-size: 14px; color: #94a3b8; }

/* İnşaat Kartları */
.insaat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 30px; }
.insaat-card { background: var(--bg-light); padding: 40px 30px; border-radius: 6px; text-align: center; transition: 0.3s; border: 1px solid #e2e8f0; }
.insaat-card:hover { background: #fff; border-color: transparent; box-shadow: 0 15px 35px rgba(0,0,0,0.06); }
.insaat-card i { font-size: 36px; color: #1a1a1a; margin-bottom: 20px; }
.insaat-card h3 { font-size: 18px; margin-bottom: 12px; color: #1a1a1a; }
.insaat-card p { font-size: 14px; color: var(--text-light); }

/* ==========================================
   5. İLETİŞİM, FORMLAR VE HARİTA
   ========================================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-info-panel h2 { font-size: 32px; color: #1a1a1a; }
.contact-method { display: flex; align-items: center; margin-bottom: 30px; }
.contact-method i { font-size: 24px; color: var(--secondary-color); width: 50px; }
.contact-method strong { display: block; font-size: 16px; color: #1a1a1a; margin-bottom: 2px; }
.contact-method p { color: var(--text-light); font-size: 15px; }

.contact-form-box { background: var(--white); padding: 45px; border-radius: 8px; box-shadow: 0 10px 35px rgba(0,0,0,0.05); }
.form-group { margin-bottom: 20px; }
.form-group input, .form-group textarea { width: 100%; padding: 16px; background-color: #f8fafc; border: 1px solid #e2e8f0; color: #1a1a1a; border-radius: 4px; font-family: inherit; font-size: 15px; transition: 0.3s; }
.form-group textarea { height: 130px; resize: none; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--secondary-color); background-color: var(--white); box-shadow: 0 0 12px rgba(212, 175, 55, 0.15); }

.map-section iframe { width: 100%; height: 400px; border: none; display: block; }
.footer { background: #0f172a; padding: 40px 0; text-align: center; color: #64748b; font-size: 14px; }

/* ==========================================
   6. MOBİL DUYARLILIK (RESPONSIVE)
   ========================================== */
@media (max-width: 992px) { .contact-grid { grid-template-columns: 1fr; gap: 40px; } }
@media (max-width: 768px) {
    .nav-links { display: flex; flex-direction: column; position: absolute; top: 100px; left: -100%; width: 100%; background: var(--primary-color); transition: 0.4s ease; padding: 20px 0; box-shadow: 0 10px 15px rgba(0,0,0,0.2); }
    .nav-links.mobile-active { left: 0; }
    .nav-links li { margin: 15px 0; text-align: center; }
    .hamburger { display: block; }
    .hero-content h1 { font-size: 36px; }
    .hero-buttons { flex-direction: column; }
    .btn { text-align: center; width: 100%; }
}