/* --- GLOBAL AYARLAR --- */
:root {
    --primary-color: #FF9900; /* İnşaat Turuncusu */
    --secondary-color: #2C3E50; /* Koyu Lacivert */
    --text-color: #333;
    --light-bg: #f4f4f4;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
}

h1, h2, h3 { font-family: 'Oswald', sans-serif; text-transform: uppercase; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding { padding: 80px 0; }
.text-center { text-align: center; }

/* --- HEADER --- */
header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--secondary-color);
}
.logo span { color: var(--primary-color); }

nav ul { display: flex; align-items: center; }
nav ul li { margin-left: 20px; }
nav ul li a { font-weight: 500; font-size: 16px; transition: 0.3s; }
nav ul li a:hover { color: var(--primary-color); }

.btn-nav {
    background: var(--primary-color);
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
}
.btn-nav:hover { background: #e68a00; }

/* --- HERO SECTION --- */
.hero {
    height: 100vh;
    background: url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    margin-top: 70px;
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(44, 62, 80, 0.7); /* Fotoğrafı karartır */
}

.hero-content { position: relative; z-index: 1; max-width: 800px; padding: 20px; }
.hero h1 { font-size: 48px; margin-bottom: 20px; }
.hero p { font-size: 20px; margin-bottom: 30px; }

.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 5px;
    font-weight: bold;
    margin: 5px;
    transition: 0.3s;
}
.btn-primary { background: var(--primary-color); color: #fff; }
.btn-primary:hover { background: #e68a00; transform: translateY(-2px); }
.btn-secondary { background: transparent; border: 2px solid #fff; color: #fff; }
.btn-secondary:hover { background: #fff; color: #333; }

/* --- SERVICES --- */
.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: var(--secondary-color);
}

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

.service-card {
    background: #fff;
    padding: 40px 20px;
    text-align: center;
    border: 1px solid #eee;
    border-radius: 8px;
    transition: 0.3s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.service-card:hover { transform: translateY(-10px); border-bottom: 5px solid var(--primary-color); }
.service-card i { font-size: 40px; color: var(--primary-color); margin-bottom: 20px; }
.service-card h3 { margin-bottom: 15px; color: var(--secondary-color); }

/* --- ABOUT --- */
.about-section { background: var(--secondary-color); color: #fff; padding: 80px 0; }
.about-content { text-align: center; max-width: 800px; margin: 0 auto; }
.features-list { margin-top: 30px; display: flex; justify-content: center; gap: 30px; flex-wrap: wrap; }
.features-list li { font-size: 18px; }
.features-list i { color: var(--primary-color); margin-right: 10px; }

/* --- CONTACT --- */
.contact-wrapper { margin-top: 40px; }
.contact-info {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    text-align: center;
}
.info-item { margin: 20px; }
.info-item i {
    font-size: 30px;
    color: var(--primary-color);
    margin-bottom: 15px;
    background: #fff;
    width: 60px;
    height: 60px;
    line-height: 60px;
    border-radius: 50%;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.info-item h4 { margin-bottom: 10px; color: var(--secondary-color); }

/* --- FOOTER --- */
footer {
    background: #222;
    color: #fff;
    text-align: center;
    padding: 20px 0;
    margin-top: auto;
}

/* --- MOBILE --- */
@media (max-width: 768px) {
    .hero h1 { font-size: 32px; }
    .nav-container { flex-direction: column; height: auto; padding: 10px 0; }
    nav ul { flex-direction: column; margin-top: 10px; }
    nav ul li { margin: 10px 0; }
    .features-list { flex-direction: column; gap: 10px; }
}