/* =========================================
   YAPI YAŞAM KURUMSAL WEB SİTESİ CSS
========================================= */

:root {
    --lacivert: #1C2B3B;
    --turkuaz: #008080;
    --bakir: #E67E22;
    --gri: #F4F6F8;
    --beyaz: #FFFFFF;
    --yazi: #333333;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Montserrat', sans-serif; }
html { scroll-behavior: smooth; }
body { background-color: var(--beyaz); color: var(--yazi); overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* NAVBAR */
header {
    background-color: var(--lacivert); color: var(--beyaz);
    padding: 15px 5%; display: flex; justify-content: space-between; align-items: center;
    position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.logo { font-size: 22px; font-weight: 700; letter-spacing: 2px; }
.logo span { color: var(--turkuaz); }
.navbar .nav-links { display: flex; gap: 30px; }
.navbar .nav-links a { font-weight: 400; font-size: 15px; transition: color 0.3s; }
.navbar .nav-links a:hover { color: var(--bakir); }
.btn-teklif {
    background-color: var(--bakir); color: var(--beyaz);
    padding: 10px 20px; border-radius: 4px; font-weight: 600; font-size: 14px; transition: 0.3s;
}
.btn-teklif:hover { background-color: #d35400; transform: translateY(-2px); }
.menu-toggle { display: none; font-size: 24px; cursor: pointer; }

/* HERO */
.hero {
    background: linear-gradient(rgba(28, 43, 59, 0.85), rgba(28, 43, 59, 0.85)), url('https://images.unsplash.com/photo-1584622650111-993a426fbf0a?q=80&w=1950&auto=format&fit=crop') center/cover;
    height: 75vh; display: flex; align-items: center; padding: 0 5%; color: var(--beyaz);
}
.hero-content { max-width: 650px; }
.hero h1 { font-size: 52px; font-weight: 700; line-height: 1.1; margin-bottom: 20px; }
.hero p { font-size: 18px; margin-bottom: 35px; font-weight: 300; line-height: 1.6; }
.hero-buttons { display: flex; gap: 15px; }
.btn-ana { background-color: var(--turkuaz); padding: 15px 30px; border-radius: 4px; font-weight: 600; transition: 0.3s; }
.btn-ana:hover { background-color: #006666; transform: translateY(-2px); }
.btn-alt { border: 2px solid var(--beyaz); padding: 13px 30px; border-radius: 4px; font-weight: 600; transition: 0.3s; }
.btn-alt:hover { background-color: var(--beyaz); color: var(--lacivert); transform: translateY(-2px); }

/* KATEGORİLER */
.kategoriler-section { padding: 80px 5%; background: var(--gri); }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 36px; color: var(--lacivert); margin-bottom: 10px; }
.section-title p { color: #666; font-size: 16px; }

.kategoriler-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 25px; }
.kategori-kart {
    background: var(--beyaz); padding: 40px 25px; border-radius: 8px; text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.03); transition: 0.4s; border-bottom: 4px solid transparent;
}
.kategori-kart:hover { transform: translateY(-10px); border-bottom: 4px solid var(--turkuaz); box-shadow: 0 15px 30px rgba(0,0,0,0.1); }
.kategori-ikon { font-size: 40px; color: var(--turkuaz); margin-bottom: 20px; }
.kategori-kart h3 { font-size: 20px; color: var(--lacivert); margin-bottom: 10px; }
.kategori-kart p { font-size: 14px; color: #777; }

/* MARKALAR */
.markalar-section { padding: 60px 0; background: var(--beyaz); overflow: hidden; }
.markalar-marquee { display: flex; overflow: hidden; user-select: none; gap: 40px; mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent); }
.markalar-track {
    flex-shrink: 0; display: flex; justify-content: space-around; gap: 40px; min-width: 100%;
    animation: scroll 30s linear infinite;
}
.markalar-track span {
    font-size: 24px; font-weight: 700; color: var(--lacivert); opacity: 0.4;
    transition: 0.3s; cursor: default; white-space: nowrap;
}
.markalar-track span:hover { opacity: 1; color: var(--turkuaz); }
@keyframes scroll { from { transform: translateX(0); } to { transform: translateX(-100%); } }

/* TEKLİF ALMA FORMU */
.teklif-section { padding: 80px 5%; background: var(--lacivert); color: var(--beyaz); }
.teklif-container { display: flex; flex-wrap: wrap; gap: 50px; align-items: flex-start; justify-content: space-between; }
.teklif-text { flex: 1; min-width: 300px; }
.teklif-text h2 { font-size: 36px; margin-bottom: 20px; }
.teklif-text p { font-size: 16px; line-height: 1.6; margin-bottom: 30px; color: #ddd; }
.teklif-ozellikler li { margin-bottom: 15px; font-size: 16px; }
.teklif-ozellikler i { color: var(--turkuaz); margin-right: 10px; }

.teklif-form { flex: 1; min-width: 300px; background: var(--beyaz); padding: 40px; border-radius: 8px; }
.form-group { margin-bottom: 20px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 15px; border: 1px solid #ccc; border-radius: 4px;
    font-family: 'Montserrat', sans-serif; font-size: 14px; outline: none; transition: 0.3s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--turkuaz); box-shadow: 0 0 5px rgba(0,128,128,0.2); }
.btn-gonder {
    width: 100%; background: var(--bakir); color: var(--beyaz); border: none;
    padding: 16px; font-size: 16px; font-weight: 700; border-radius: 4px; cursor: pointer; transition: 0.3s;
}
.btn-gonder:hover { background: #d35400; }

/* FOOTER */
footer { background: #111b25; color: #aaa; padding: 60px 5% 20px; }
.footer-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; margin-bottom: 40px; }
.footer-col h4 { color: var(--beyaz); margin-bottom: 20px; font-size: 18px; }
.footer-col ul li { margin-bottom: 12px; font-size: 14px; }
.footer-col ul li a:hover { color: var(--turkuaz); }
.iletisim-list li { display: flex; align-items: flex-start; gap: 10px; line-height: 1.5; }
.iletisim-list i { color: var(--turkuaz); margin-top: 4px; }
.footer-bottom { text-align: center; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; font-size: 13px; }

/* WHATSAPP BUTONU */
.whatsapp-btn {
    position: fixed; bottom: 30px; right: 30px; background: #25D366; color: white;
    width: 60px; height: 60px; border-radius: 50%; display: flex; justify-content: center; align-items: center;
    font-size: 35px; box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4); z-index: 1000; transition: 0.3s;
}
.whatsapp-btn:hover { transform: scale(1.1); }

/* MOBİL UYUM (RESPONSIVE) */
@media (max-width: 992px) {
    .hero h1 { font-size: 40px; }
    .teklif-container { flex-direction: column; }
}
@media (max-width: 768px) {
    .navbar { display: none; }
    .navbar.active { display: block; position: absolute; top: 100%; left: 0; width: 100%; background: var(--lacivert); padding: 20px; }
    .navbar.active .nav-links { flex-direction: column; gap: 15px; }
    .menu-toggle { display: block; }
    .btn-teklif { display: none; }
    .hero { height: auto; padding: 100px 5%; text-align: center; }
    .hero-buttons { flex-direction: column; }
    .hero h1 { font-size: 32px; }
}