:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --text-light: #555555;
    --accent-color: #f4b400;
    --accent-hover: #dca300;
    --light-bg: #fdfdfd;
    --border-color: #eeeeee;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; background-color: var(--bg-color); color: var(--text-color); line-height: 1.6; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
.text-center { text-align: center; }
.bg-light { background-color: var(--light-bg); }
.w-100 { width: 100%; }

/* Butonlar */
.btn-primary {
    display: inline-block;
    background-color: var(--accent-color);
    color: #1a1a1a;
    padding: 14px 32px;
    text-decoration: none;
    font-weight: 600;
    border-radius: 2px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}
.btn-primary:hover { background-color: var(--accent-hover); box-shadow: 0 4px 12px rgba(244, 180, 0, 0.2); }

/* Navbar */
.navbar { position: sticky; top: 0; background: #fff; z-index: 1000; border-bottom: 1px solid var(--border-color); padding: 15px 0; }
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.4rem; font-weight: 700; text-decoration: none; color: #1a1a1a; text-transform: uppercase; letter-spacing: 1px; }
.logo span { color: var(--accent-color); }
.nav-links { list-style: none; display: flex; gap: 25px; }
.nav-links a { text-decoration: none; color: #1a1a1a; font-weight: 500; font-size: 0.9rem; transition: color 0.3s; }
.nav-links a:hover { color: var(--accent-color); }

/* Hero */
.hero {
    height: 75vh;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('https://images.unsplash.com/photo-1503387762-592dea58ef23?q=80&w=1920&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
}
.hero h1 { font-size: 3rem; margin-bottom: 20px; font-weight: 700; }
.hero p { font-size: 1.2rem; margin-bottom: 30px; max-width: 700px; margin-left: auto; margin-right: auto; }

/* Sections */
.section { padding: 90px 0; }
.section-title { font-size: 2.2rem; margin-bottom: 15px; }
.section-subtitle { color: var(--text-light); margin-bottom: 50px; display: block; }

/* Hakkımızda Grid */
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.about-box { padding: 40px; border: 1px solid var(--border-color); background: #fff; }
.about-box h3 { color: var(--accent-color); margin-bottom: 15px; font-size: 1.3rem; }

/* Projeler */
.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.project-card { border: 1px solid var(--border-color); overflow: hidden; background: #fff; }
.project-img { height: 240px; background-color: #f0f0f0; background-image: url('https://images.unsplash.com/photo-1512917774080-9991f1c4c750?q=80&w=600&auto=format&fit=crop'); background-size: cover; }
.project-info { padding: 25px; }
.project-info h3 { margin-bottom: 10px; font-size: 1.1rem; }
.project-info p { color: var(--text-light); font-size: 0.9rem; }

/* İletişim */
.contact-wrapper { display: grid; grid-template-columns: 1fr 1.5fr; gap: 50px; }
.contact-info h3 { margin-bottom: 20px; }
.contact-info p { margin-bottom: 15px; }
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; font-size: 0.9rem; font-weight: 600; }
.form-group input, .form-group textarea { width: 100%; padding: 12px; border: 1px solid #ddd; font-family: inherit; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--accent-color); }

/* Footer */
footer { padding: 40px 0; border-top: 1px solid var(--border-color); font-size: 0.85rem; color: #888; }

/* Scroll Fade */
.fade-in { opacity: 0; transform: translateY(20px); transition: 0.8s ease-out; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* WhatsApp */
.whatsapp-float { position: fixed; bottom: 30px; right: 30px; background: #25d366; width: 55px; height: 55px; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 10px rgba(0,0,0,0.1); z-index: 1000; }