:root { 
    --primary: #00e640;       /* Neon Yeşil */
    --primary-dark: #00b332;  /* Koyu Yeşil (Hover için) */
    --dark: #111; 
    --darker: #0a0a0a; 
    --light: #fff; 
}

html { scroll-behavior: smooth; }
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Poppins', sans-serif; background-color: var(--dark); color: var(--light); overflow-x: hidden; line-height: 1.6; display: flex; flex-direction: column; min-height: 100vh; }
a { text-decoration: none; color: inherit; } ul { list-style: none; } img { max-width: 100%; }

/* --- YAPAY ZEKA BUTONU (Yeşil Gradient) --- */
.btn-ai {
    background: linear-gradient(45deg, #00e640, #00992b);
    color: #000;
    padding: 15px 30px;
    border-radius: 30px;
    font-weight: 800;
    text-transform: uppercase;
    box-shadow: 0 0 15px rgba(0, 230, 64, 0.4);
    transition: 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
    border: 2px solid transparent;
}
.btn-ai:hover {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 25px rgba(0, 230, 64, 0.8);
    transform: translateY(-3px);
}
.btn-ai i { font-size: 1.2rem; }

/* --- NAVBAR --- */
header { position: fixed; top: 0; left: 0; width: 100%; background: rgba(0, 0, 0, 0.95); padding: 15px 5%; display: flex; justify-content: space-between; align-items: center; z-index: 1000; border-bottom: 1px solid #222; }
.logo-container img { height: 50px; width: auto; object-fit: contain; display: block; }

nav ul { display: flex; gap: 30px; align-items: center; } /* Align items eklendi */
nav ul li a { font-size: 15px; font-weight: 500; text-transform: uppercase; letter-spacing: 1px; transition: color 0.3s; }
nav ul li a:hover { color: var(--primary); text-shadow: 0 0 10px rgba(0,230,64,0.5); }

.btn-join { 
    background: linear-gradient(45deg, #00e640, #00992b); 
    color: #000;
    padding: 10px 25px; 
    border-radius: 5px; 
    font-weight: 700; 
    text-transform: uppercase; 
    font-size: 14px; 
    transition: all 0.3s; 
    box-shadow: 0 0 10px rgba(0, 230, 64, 0.3);
    cursor: pointer;
    white-space: nowrap; /* Mobilde taşmasın */
}
.btn-join:hover { 
    background-color: var(--primary-dark); 
    box-shadow: 0 0 20px rgba(0, 230, 64, 0.6);
    transform: translateY(-2px); 
}
.menu-toggle { display: none; font-size: 24px; cursor: pointer; color: var(--primary); }

/* --- HERO --- */
.hero { height: 100vh; background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(17,17,17,1)), url('https://images.unsplash.com/photo-1534438327276-14e5300c3a48?q=80&w=1470&auto=format&fit=crop'); background-size: cover; background-position: center; background-attachment: fixed; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 0 20px; }
.hero h1 { font-size: 4.5rem; font-weight: 800; margin-bottom: 10px; text-transform: uppercase; line-height: 1.1; letter-spacing: -2px; }
.hero h1 span { color: var(--primary); text-shadow: 0 0 20px rgba(0, 230, 64, 0.4); }
.hero p { font-size: 1.2rem; margin-bottom: 40px; color: #ccc; max-width: 600px; }

.btn-outline { border: 2px solid var(--primary); color: var(--primary); padding: 15px 40px; border-radius: 30px; font-weight: 600; text-transform: uppercase; transition: all 0.3s ease; }
.btn-outline:hover { background: var(--primary); color: #000; box-shadow: 0 0 20px rgba(0, 230, 64, 0.5); }

/* --- SERVICES --- */
.services { padding: 100px 5%; background-color: var(--darker); scroll-margin-top: 80px; }
.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { font-size: 2.5rem; text-transform: uppercase; margin-bottom: 10px; }
.section-title span { display: block; width: 60px; height: 4px; background: var(--primary); margin: 0 auto; box-shadow: 0 0 10px var(--primary); }

.cards-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.card { background: #1a1a1a; padding: 40px 30px; border-radius: 10px; text-align: center; transition: all 0.3s ease; border: 1px solid #333; }
.card:hover { transform: translateY(-10px); border-color: var(--primary); box-shadow: 0 10px 30px rgba(0, 230, 64, 0.2); }
.card i { font-size: 50px; color: var(--primary); margin-bottom: 25px; text-shadow: 0 0 15px rgba(0, 230, 64, 0.4); }
.card h3 { font-size: 1.5rem; margin-bottom: 15px; color: #fff; }
.card p { color: #999; font-size: 0.95rem; }

/* --- FOOTER --- */
footer { background: #050505; padding: 50px 5% 20px; border-top: 1px solid #222; margin-top: auto; }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; margin-bottom: 40px; }
.footer-logo { font-size: 24px; font-weight: 700; color: #fff; margin-bottom: 20px; display: block; }
.footer-logo span { color: var(--primary); }
.socials a { display: inline-block; width: 40px; height: 40px; background: #222; color: #fff; text-align: center; line-height: 40px; border-radius: 50%; margin-right: 10px; transition: 0.3s; }
.socials a:hover { background: var(--primary); color: #000; box-shadow: 0 0 10px var(--primary); }
.footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid #222; color: #666; font-size: 0.8rem; }

/* --- ANIMASYONLAR (OBSERVER) --- */
section {
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s ease;
}

section.gorundu {
    opacity: 1;
    transform: translateY(0);
}

@keyframes perdeAcilis {
    0% { clip-path: polygon(0 0, 0 0, 0 100%, 0% 100%); opacity: 0; transform: translateX(-20px); }
    100% { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); opacity: 1; transform: translateX(0); }
}

.about-image img, .hero-text {
    animation: perdeAcilis 1s ease-out forwards;
    animation-delay: 0.3s;
}

/* ============================================================
   MOBİL UYUMLULUK (MEDIA QUERIES)
   ============================================================ */
@media (max-width: 992px) {
    /* Tablet ve Mobil İçin Ortak Ayarlar */
    .hero h1 { font-size: 3.5rem; }
}

@media (max-width: 768px) {
    /* 1. Header & Navigasyon */
    header {
        padding: 15px 20px; /* Mobilde biraz daha geniş boşluk */
    }

    .menu-toggle {
        display: block !important;
        position: relative;
        z-index: 2002; /* En üstte */
    }

    nav {
        position: fixed;
        top: 0; 
        right: -100%; /* Başlangıçta sağda gizli */
        width: 100%; /* Tam ekran genişliği */
        height: 100vh;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(10px);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.4s ease; /* Kayma efekti */
        z-index: 2000;
    }

    nav.active {
        right: 0; /* Açılınca ekrana gelir */
    }

    nav ul {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }

    nav ul li a {
        font-size: 1.5rem;
        color: #fff;
    }

    /* 2. Buton Mobilde de Görünsün (Nav'ın içine taşıyacağız JS ile veya burda stil verelim) */
    .btn-join {
        /* Mobilde buton header'da değil, menünün içinde en altta çıksın diye display:none yapmadım.
           Ancak header içindeki butonu gizleyip menü içine almak daha temizdir.
           Şimdilik header'da gizleyelim, menü açılınca görünsün diyorsan JS lazım.
           Ama en kolayı: Header'daki butonu gizle.
        */
        display: none; 
    }
    
    /* Eğer menü açılınca butonun görünmesini istersen JS ile nav içine bir kopya buton eklenmeli */

    /* 3. Hero Başlık */
    .hero h1 { font-size: 2.5rem; }
    .hero p { font-size: 1rem; padding: 0 10px; }

    /* 4. Kartlar */
    .cards-container { grid-template-columns: 1fr; }
    
    /* 5. Sidebar (Profil Sayfası için) */
    .sidebar { 
        display: none; /* Mobilde sidebar gizlenir, menüden erişilir */
    }
}