:root {
    --primary-color: #0056b3; /* Güven veren endüstriyel mavi */
    --secondary-color: #ff6600; /* Aksiyon rengi (Turuncu) */
    --dark-bg: #1a1a1a;
    --light-bg: #f4f7f6;
    --text-color: #333;
    --white: #ffffff;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Barlow', sans-serif; line-height: 1.6; color: var(--text-color); }
a { text-decoration: none; transition: 0.3s; }
ul { list-style: none; }

/* Utilities */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.btn { display: inline-block; padding: 12px 30px; border-radius: 50px; font-weight: 600; cursor: pointer; text-align: center; }
.btn-primary { background: var(--secondary-color); color: var(--white); }
.btn-primary:hover { background: #e65c00; transform: translateY(-2px); }
.btn-white { background: var(--white); color: var(--text-color); margin-left: 10px; }
.btn-outline { border: 2px solid var(--primary-color); color: var(--primary-color); padding: 8px 20px; }
.section-padding { padding: 80px 0; }
.text-link { color: var(--primary-color); font-weight: bold; font-size: 0.9rem; }

/* Whatsapp Float */
.whatsapp-float { position: fixed; width: 60px; height: 60px; bottom: 40px; right: 40px; background-color: #25d366; color: #FFF; border-radius: 50px; text-align: center; font-size: 30px; box-shadow: 2px 2px 3px #999; z-index: 1000; display: flex; align-items: center; justify-content: center; transition: 0.3s; }
.whatsapp-float:hover { transform: scale(1.1); }

/* Header */
header { background: var(--white); box-shadow: 0 2px 10px rgba(0,0,0,0.1); position: fixed; w-100; width: 100%; top: 0; z-index: 999; }
.header-container { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.logo a { font-size: 24px; font-weight: 800; color: var(--dark-bg); letter-spacing: -1px; }
.logo span { color: var(--primary-color); }
.sub-logo { font-size: 12px; color: #777; margin-top: -5px; }
.navbar ul { display: flex; gap: 20px; }
.navbar a { color: var(--text-color); font-weight: 600; font-size: 15px; }
.navbar a:hover { color: var(--primary-color); }
.mobile-toggle { display: none; font-size: 24px; cursor: pointer; }

/* --- HERO SECTION REVİZE EDİLDİ --- */
#hero {
    height: 100vh;
    position: relative;
    /* Koyu Endüstriyel Mavi Gradyan (Yedek) */
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--white);
    text-align: center;
}

/* Canvas (Efektin Çizildiği Yer) */
#hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1; /* En altta */
    opacity: 0.6; /* Çok baskın olmasın */
}

/* Overlay (Yazıların Okunması İçin) */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, #0f172a 90%);
    z-index: 2;
}

/* İçerik (Yazılar) */
.hero-content {
    position: relative;
    z-index: 3; /* En üstte */
    max-width: 900px;
    padding: 0 20px;
}

/* H1 ve H2 Ayarları (SEO Hiyerarşisi) */
.hero-content h1 {
    font-size: 2rem; /* H1 Teknik Başlık - Orta Boy */
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-content h2 {
    font-size: 3.5rem; /* H2 Slogan - Büyük Boy */
    font-weight: 800;
    margin-bottom: 25px;
    line-height: 1.1;
    color: var(--white);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #cbd5e1; /* Hafif gri beyaz */
}

.hero-buttons { margin-top: 30px; }

/* Pulse Animation */
.pulse-anim { animation: pulse 2s infinite; }
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 102, 0, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(255, 102, 0, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 102, 0, 0); }
}

/* Section Titles */
.section-title { text-align: center; margin-bottom: 50px; }
.section-title span { color: var(--secondary-color); font-weight: 700; text-transform: uppercase; letter-spacing: 1px; font-size: 14px; }
.section-title h2 { font-size: 2.5rem; color: var(--dark-bg); margin-top: 10px; }

/* Features Grid */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.feature-box { text-align: center; padding: 40px 20px; border: 1px solid #eee; border-radius: 10px; transition: 0.3s; }
.feature-box:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.1); border-color: var(--primary-color); }
.feature-box i { font-size: 40px; color: var(--primary-color); margin-bottom: 20px; }
.center-cta { text-align: center; margin-top: 40px; }
.btn-secondary { background: #25d366; color: white; }

/* Services */
.bg-light { background-color: var(--light-bg); }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.service-card { background: var(--white); padding: 30px; border-radius: 8px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
.service-card .icon { width: 60px; height: 60px; background: rgba(0,86,179,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.service-card .icon i { font-size: 24px; color: var(--primary-color); }

/* Tabs (Rehber) */
.tabs-container { background: var(--white); border-radius: 10px; overflow: hidden; box-shadow: 0 5px 20px rgba(0,0,0,0.1); }
.tab-buttons { display: flex; background: #f1f1f1; }
.tab-btn { flex: 1; padding: 20px; border: none; background: none; cursor: pointer; font-size: 16px; font-weight: 600; color: #555; transition: 0.3s; }
.tab-btn:hover { background: #e9e9e9; }
.tab-btn.active { background: var(--white); color: var(--secondary-color); border-top: 3px solid var(--secondary-color); }
.tab-content { padding: 40px; display: none; animation: fadeEffect 0.5s; }
.tech-table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.tech-table th, .tech-table td { border: 1px solid #ddd; padding: 12px; text-align: left; }
.tech-table th { background-color: var(--primary-color); color: white; }
.tab-note { font-size: 0.9rem; color: #777; font-style: italic; margin-bottom: 20px; }
.btn-sm { padding: 8px 20px; font-size: 14px; }
@keyframes fadeEffect { from {opacity: 0;} to {opacity: 1;} }

/* Accordion (SSS) */
.accordion-item { background: var(--white); margin-bottom: 10px; border-radius: 5px; overflow: hidden; }
.accordion-header { width: 100%; padding: 20px; text-align: left; background: none; border: none; cursor: pointer; font-size: 16px; font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.accordion-header::after { content: '\002B'; font-size: 20px; font-weight: bold; }
.accordion-header.active::after { content: '\2212'; }
.accordion-body { padding: 0 20px; max-height: 0; overflow: hidden; transition: max-height 0.2s ease-out; background: #fafafa; }
.accordion-body p { padding: 20px 0; }

/* Contact Form */
.contact-wrapper { display: flex; gap: 50px; }
.contact-info { flex: 1; }
.contact-form { flex: 1; background: var(--white); padding: 40px; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.info-item { display: flex; align-items: center; margin-bottom: 20px; }
.info-item i { width: 40px; height: 40px; background: var(--light-bg); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--primary-color); margin-right: 15px; }
.form-group { margin-bottom: 20px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 15px; border: 1px solid #ddd; border-radius: 5px; font-family: inherit; }
.full-width { width: 100%; }

/* Footer */
footer { background: #111; color: #aaa; padding: 40px 0; font-size: 14px; }
.footer-content { display: flex; justify-content: space-between; align-items: center; }
.footer-links a { color: #aaa; margin-left: 20px; }
.footer-links a:hover { color: var(--white); }
.footer-note a { color: var(--secondary-color); }

/* Mobile Responsive */
@media (max-width: 768px) {
    .header-container { padding: 0 20px; }
    .mobile-toggle { display: block; }
    .navbar { display: none; position: absolute; top: 80px; left: 0; width: 100%; background: var(--white); box-shadow: 0 5px 10px rgba(0,0,0,0.1); }
    .navbar ul { flex-direction: column; padding: 20px; gap: 10px; }
    .header-cta { display: none; }
    .hero-content h1 { font-size: 1.2rem; }
    .hero-content h2 { font-size: 2.2rem; }
    .grid-3 { grid-template-columns: 1fr; }
    .contact-wrapper { flex-direction: column; }
    .footer-content { flex-direction: column; gap: 20px; text-align: center; }
}