/* Google Fonts[cite: 14] */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-color: #112A46; /* Kurumsal Lacivert */
    --secondary-color: #112A46;
    --accent-color: #55a4f1; /* Kurumsal Mavi */
    --text-color: #333333;
    --light-bg: #f2f2f2;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    overflow-x: hidden;
}

/* Navbar Şeffaflık & Geçiş[cite: 14] */
.navbar {
    transition: all 0.4s ease;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.nav-link {
    font-weight: 500;
    color: var(--primary-color) !important;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0; height: 2px;
    bottom: 0; left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s;
}

.nav-link:hover::after {
    width: 100%;
}

/* Yenilikçi Hero Slider (Tam Ekran)[cite: 14] */
.hero-section {
    height: 100vh;
    background: linear-gradient(rgba(17, 42, 70, 0.7), rgba(17, 42, 70, 0.7)), url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover;
    display: flex;
    align-items: center;
    color: white;
    position: relative;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: fadeInUp 1s ease;
}

/* Modern Servis Kartları[cite: 14] */
.service-card {
    background: white;
    border-radius: 15px;
    padding: 40px 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    border-bottom: 4px solid transparent;
    height: 100%;
}

.service-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border-bottom: 4px solid var(--accent-color);
}

.icon-box {
    width: 80px; height: 80px;
    background: var(--light-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--primary-color);
    margin-bottom: 25px;
    transition: all 0.4s ease;
}

.service-card:hover .icon-box {
    background: var(--primary-color);
    color: white;
}

/* Değerlerimiz (Accordion)[cite: 14] */
.accordion-button:not(.collapsed) {
    background-color: var(--primary-color);
    color: white;
}

/* Footer[cite: 14] */
.footer {
    background-color: #0b1120;
    color: #a0aec0;
    padding: 80px 0 30px;
}

.footer-heading {
    color: white;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--accent-color);
}