:root {
    --teyobi-cyan: #00c4cc; /* Logodan alınan yaklaşık vurgu rengi */
    --dark-bg-main: #0f1115;
    --dark-bg-secondary: #1a1d24;
    --dark-card-bg: #22262f;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--dark-bg-main) !important;
    color: #e0e0e0;
}

/* Vurgu Rengi Yardımcı Sınıfları */
.text-cyan { color: var(--teyobi-cyan) !important; }
.bg-cyan { background-color: var(--teyobi-cyan) !important; }

/* Özel Butonlar */
.btn-cyan {
    background-color: var(--teyobi-cyan);
    color: #fff;
    font-weight: 600;
    border: none;
    padding: 10px 25px;
    transition: all 0.3s ease;
}
.btn-cyan:hover {
    background-color: #00a8af;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 196, 204, 0.3);
}
.btn-outline-cyan {
    border: 2px solid var(--teyobi-cyan);
    color: var(--teyobi-cyan);
    font-weight: 600;
    padding: 10px 25px;
    transition: all 0.3s ease;
}
.btn-outline-cyan:hover {
    background-color: var(--teyobi-cyan);
    color: #fff;
}

/* Navbar Özelleştirme */
.navbar {
    background-color: rgba(15, 17, 21, 0.95) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.navbar-brand img {
    height: 50px; /* Logo boyutu ayarı */
}
.nav-link {
    font-weight: 500;
    letter-spacing: 0.5px;
}
.nav-link.active {
    color: var(--teyobi-cyan) !important;
}
.lang-switcher {
    margin-left: 15px;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}
.lang-switcher:hover {
    background-color: rgba(0, 196, 204, 0.1);
}

/* Hero Alanı */
.hero-section {
    position: relative;
    /* Arka plana teknolojik bir görsel koyabilirsiniz. Şimdilik koyu gradient. */
    background: linear-gradient(135deg, var(--dark-bg-main) 0%, #1c2833 100%);
    padding: 150px 0 100px 0;
    overflow: hidden;
}
        /* Arka plan için soyut teknoloji deseni */
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0; right: 0; bottom: 0; left: 0;
            background: 
                radial-gradient(circle at 20% 50%, rgba(0, 196, 204, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(0, 196, 204, 0.08) 0%, transparent 50%),
                linear-gradient(135deg, transparent 0%, rgba(0, 196, 204, 0.03) 100%);
            opacity: 1;
            z-index: 0;
        }
.hero-content {
    position: relative;
    z-index: 1;
}
.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
}
.hero-subtitle {
    font-size: 1.2rem;
    color: #a0a0a0;
    margin-bottom: 2rem;
}

/* Hizmet Kartları */
.services-section {
    background-color: var(--dark-bg-secondary);
    padding: 100px 0;
}
.service-card {
    background-color: var(--dark-card-bg);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 15px;
    padding: 40px 30px;
    transition: all 0.4s ease;
    height: 100%;
}
.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--teyobi-cyan);
    box-shadow: 0 10px 30px rgba(0, 12, 20, 0.5);
}
.service-icon {
    font-size: 3rem;
    color: var(--teyobi-cyan);
    margin-bottom: 25px;
}
.service-title {
    font-weight: 600;
    margin-bottom: 15px;
    color: #fff;
}
.service-text {
    color: #b0b0b0;
}

/* Footer */
.footer {
    background-color: #08090b;
    padding: 80px 0 30px 0;
    border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-logo {
    height: 80px;
    margin-bottom: 20px;
}
.footer h5 {
    color: #fff;
    font-weight: 600;
    margin-bottom: 25px;
}
.footer ul li {
    margin-bottom: 12px;
}
.footer ul li a {
    color: #a0a0a0;
    text-decoration: none;
    transition: color 0.3s;
}
.footer ul li a:hover {
    color: var(--teyobi-cyan);
}
.contact-info i {
    color: var(--teyobi-cyan);
    margin-right: 10px;
    width: 20px;
}
.legal-info {
    font-size: 0.9rem;
    color: #808080;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 30px;
    margin-top: 50px;
}
.legal-label {
    color: var(--teyobi-cyan);
    font-weight: 500;
}

/* Mobil Uyumluluk Ayarları */
@media (max-width: 768px) {
    .hero-title { 
        font-size: 2rem; 
        line-height: 1.3;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .hero-section { 
        padding: 120px 0 60px 0; 
    }
    .services-section {
        padding: 60px 0;
    }
    .service-card {
        padding: 30px 20px;
        margin-bottom: 20px;
    }
    .service-icon {
        font-size: 2.5rem;
    }
    .navbar-brand img {
        height: 40px;
    }
    .footer {
        padding: 50px 0 20px 0;
    }
    .footer-logo {
        height: 60px;
    }
    .lang-switcher {
        margin-left: 10px;
        padding: 5px 10px;
        font-size: 0.85rem;
    }
    .btn-cyan, .btn-outline-cyan {
        padding: 8px 20px;
        font-size: 0.9rem;
    }
}
@media (max-width: 576px) {
    .hero-title { 
        font-size: 1.75rem; 
    }
    .hero-subtitle {
        font-size: 0.95rem;
    }
        .service-card {
            padding: 25px 15px;
        }
        .hero-visual, .about-visual {
            height: 300px !important;
        }
    }

    /* Intro Video Overlay */
    .intro-video-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: #000;
        z-index: 9999;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        opacity: 1;
        transition: opacity 0.5s ease-out;
    }
    .intro-video-overlay.hidden {
        opacity: 0;
        pointer-events: none;
    }
    .intro-video-container {
        position: relative;
        width: 100%;
        height: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    .intro-video {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .intro-skip-btn {
        position: absolute;
        bottom: 30px;
        left: 50%;
        transform: translateX(-50%);
        padding: 12px 30px;
        background-color: rgba(0, 196, 204, 0.2);
        border: 2px solid var(--teyobi-cyan);
        color: var(--teyobi-cyan);
        border-radius: 25px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s ease;
        font-size: 1rem;
        z-index: 10000;
        backdrop-filter: blur(10px);
    }
    .intro-skip-btn:hover {
        background-color: var(--teyobi-cyan);
        color: #fff;
        transform: translateX(-50%) translateY(-2px);
        box-shadow: 0 5px 15px rgba(0, 196, 204, 0.3);
    }
    @media (max-width: 768px) {
        .intro-skip-btn {
            padding: 10px 25px;
            font-size: 0.9rem;
            bottom: 20px;
        }
    }