/* style.css - Ceylan Bilgisayar Premium Responsive */

/* --- TEMEL DEĞİŞKENLER --- */
:root {
    --primary-color: #0d47a1;   /* Kurumsal Koyu Mavi */
    --secondary-color: #1565c0; /* Açık Mavi */
    --accent-color: #e3f2fd;    /* Çok Açık Mavi (Arka plan vurguları için) */
    --success-color: #2e7d32;   /* Whatsapp/Telefon Yeşili */
    --dark-color: #212121;      /* Metin Rengi */
    --light-color: #f8f9fa;     /* Site Arka Planı */
    --white-color: #ffffff;
    --font-family: 'Poppins', sans-serif;
    --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    --border-radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-family);
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
    overflow-x: hidden; /* Yatay taşmayı engeller */
}

a { text-decoration: none; transition: 0.3s; }
ul { list-style: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- HEADER ÖZEL --- */
.top-bar {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 0;
    font-size: 0.85em;
}

.header-main {
    background: var(--white-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--box-shadow);
}

.nav-link {
    color: var(--dark-color);
    font-weight: 500;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-link:hover { color: var(--primary-color); }
.nav-link i { color: var(--secondary-color); }

/* --- MOBİL MENÜ (HAMBURGER) --- */
.hamburger {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--primary-color);
}

@media (max-width: 992px) {
    .top-bar { display: none; } /* Mobilde üst barı gizle */
    .hamburger { display: block; }
    
    .nav-list {
        position: fixed;
        top: 70px; /* Header yüksekliği kadar boşluk */
        right: -100%;
        background: var(--white-color);
        width: 100%;
        height: calc(100vh - 70px);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 40px;
        transition: 0.4s ease-in-out;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        gap: 30px;
    }
    
    .nav-list.active { right: 0; }
    .nav-link { font-size: 1.2rem; width: 100%; justify-content: center; }
}

/* --- GENEL DÜZENLER (GRID & HERO) --- */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white-color);
    text-align: center;
    padding: 100px 20px;
}
.hero h1 { font-size: 3em; margin-bottom: 20px; font-weight: 700; }

.section { padding: 60px 0; }
.section-title { text-align: center; font-size: 2.2em; margin-bottom: 40px; color: var(--primary-color); }

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

/* Footer Grid Düzenlemesi */
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); /* Footer sütunları */
    gap: 40px;
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .footer-grid { grid-template-columns: 1fr; text-align: center; } /* Footer mobilde tek sütun */
    .footer-col h4 { border-left: none !important; border-bottom: 2px solid #4CAF50; display: inline-block; padding-bottom: 5px; }
}

/* --- KART TASARIMI --- */
.card {
    background: var(--white-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border-top: 4px solid var(--secondary-color);
    transition: 0.3s;
}
.card:hover { transform: translateY(-5px); }

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