@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@300;500;700&display=swap');

:root {
    --neon-blue: #00f2fe;
    --neon-purple: #4facfe;
    --neon-orange: #ff9a9e;
    --bg-dark: #050b14;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--bg-dark);
    color: #fff;
    font-family: 'Rajdhani', sans-serif;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(79, 172, 254, 0.1) 0%, transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(255, 154, 158, 0.1) 0%, transparent 25%);
}

/* Arka Plan Izgarası (Cyber Grid) */
body::before {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: 
        linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%),
        linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    background-size: 100% 2px, 3px 100%;
    pointer-events: none;
    z-index: -1;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
    background: rgba(5, 11, 20, 0.8);
}

.nav-logo img { height: 50px; }

nav ul { display: flex; gap: 2rem; list-style: none; }
nav a {
    color: #fff;
    text-decoration: none;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: 0.3s;
    text-transform: uppercase;
}
nav a:hover {
    color: var(--neon-blue);
    text-shadow: 0 0 10px var(--neon-blue);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 1rem;
    position: relative;
}

.hero-logo-large {
    width: 280px;
    margin-bottom: 2rem;
    filter: drop-shadow(0 0 20px rgba(0, 242, 254, 0.4));
    animation: float 6s ease-in-out infinite;
}

h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, var(--neon-blue));
    -webkit-background-clip: text;
    color: transparent;
    text-shadow: 0 0 20px rgba(0, 242, 254, 0.3);
}

.subtitle {
    font-size: 1.5rem;
    color: #a0aec0;
    margin-bottom: 2rem;
    letter-spacing: 2px;
}

.est {
    font-size: 0.9rem;
    color: var(--neon-orange);
    border: 1px solid var(--neon-orange);
    padding: 5px 15px;
    border-radius: 20px;
    margin-bottom: 2rem;
    display: inline-block;
}

/* Buttons */
.btn-glow {
    padding: 1rem 3rem;
    background: transparent;
    color: var(--neon-blue);
    border: 2px solid var(--neon-blue);
    font-family: 'Orbitron', sans-serif;
    text-transform: uppercase;
    text-decoration: none;
    font-weight: bold;
    border-radius: 5px;
    transition: 0.3s;
    box-shadow: 0 0 10px var(--neon-blue) inset, 0 0 20px var(--neon-blue);
}

.btn-glow:hover {
    background: var(--neon-blue);
    color: #000;
    box-shadow: 0 0 40px var(--neon-blue);
}

/* Cards & Grid */
.container { max-width: 1200px; margin: 0 auto; padding: 5rem 2rem; }
.section-title {
    text-align: center;
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #fff;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 16px;
    transition: 0.4s;
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 4px; height: 100%;
    background: var(--neon-orange);
    opacity: 0;
    transition: 0.3s;
}

.glass-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border-color: var(--neon-blue);
}

.glass-card:hover::before { opacity: 1; }

.glass-card h3 {
    font-family: 'Orbitron', sans-serif;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    color: var(--neon-blue);
}

/* Footer */
footer {
    border-top: 1px solid var(--glass-border);
    padding: 3rem;
    text-align: center;
    background: #02040a;
}
footer a { color: var(--text-muted); text-decoration: none; margin: 0 15px; transition: 0.3s; }
footer a:hover { color: var(--neon-blue); }

/* Animation Keyframes */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    nav { display: none; } /* Basitlik için mobilde menüyü gizledik */
}