:root {
    --primary-glow: rgba(64, 224, 208, 0.4); /* Turkuaz parlama */
    --secondary-glow: rgba(10, 20, 60, 0.9); /* Lacivert uzay karanlığı */
    --text-primary: #ffffff;
}

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

body, html {
    width: 100%;
    height: 100%;
    font-family: 'Outfit', sans-serif;
    background-color: #030303;
    overflow: hidden; /* Sayfanın kaymasını engeller */
}

/* Background Video and Overlay */
.video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

/* WebGL Canvas */
#bg-canvas {
    width: 100%;
    height: 100%;
    display: block;
    /* WebGL desteklenmiyorsa veya hata verirse görünecek yedek (fallback) CSS arkaplanı */
    background: radial-gradient(circle at center, rgba(30, 45, 80, 1) 0%, rgba(5, 10, 15, 1) 70%, #000 100%);
}

/* Main Content */
.content {
    position: relative;
    z-index: 10;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    perspective: 1000px; /* 3D efekti için */
}

/* Main Text Container (Removed Glass Panel) */
.glass-panel {
    padding: 4rem 3rem;
    max-width: 800px;
    text-align: center;
    transform-style: preserve-3d;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Logo */
.logo {
    width: 260px;
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.2));
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), filter 0.4s ease;
    transform: translateZ(40px); /* 3D Derinlik */
}

.glass-panel:hover .logo {
    transform: translateZ(60px) scale(1.05);
    filter: drop-shadow(0 0 25px rgba(255, 255, 255, 0.5));
}

/* Slogan Container */
.slogan-container {
    position: absolute;
    bottom: 8%; /* Ekranın alt kısmından yüksekliği */
    left: 0;
    width: 100%;
    text-align: center;
    padding: 0 2rem;
    z-index: 15;
}

/* Slogan */
.slogan {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-primary);
    font-weight: 300;
    letter-spacing: 0.5px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUpSlogan 1s cubic-bezier(0.16, 1, 0.3, 1) 0.5s forwards;
}

/* Animations */
@keyframes fadeUp {
    0% {
        opacity: 0;
        transform: translateY(40px) translateZ(0);
    }
    100% {
        opacity: 1;
        transform: translateY(0) translateZ(0);
    }
}

@keyframes fadeUpSlogan {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .glass-panel {
        padding: 2rem 1rem;
    }
    
    .logo {
        width: 180px;
    }

    .slogan {
        font-size: 0.75rem; /* Mobilde de masaüstündeki gibi küçük ve 2 satır kalması için */
    }
}