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

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

/* --- HEADER & NAV (ORTAK TASARIM) --- */
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; }
nav ul li a { font-size: 15px; font-weight: 500; text-transform: uppercase; transition: color 0.3s; }
nav ul li a:hover { color: var(--primary); text-shadow: 0 0 10px rgba(0,230,64,0.5); }
.active-link { color: var(--primary); font-weight: 700; text-shadow: 0 0 10px rgba(0,230,64,0.3); }

/* --- GİRİŞ BUTONU --- */
.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: 0.3s; 
    box-shadow: 0 0 10px rgba(0, 230, 64, 0.3);
    cursor: pointer;
    white-space: nowrap;
}
.btn-join:hover { 
    background: 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); }

/* --- PROGRAMLAR BÖLÜMÜ --- */
.programs-section { padding: 120px 5% 50px; background-color: var(--dark); min-height: 100vh; }

/* Başlık ve Buton Kutusu */
.program-baslik-kutusu {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #333;
    padding-bottom: 15px;
    margin-bottom: 25px;
    margin-top: 40px; /* Üstten biraz boşluk */
}
.program-baslik-kutusu h2 { font-size: 1.8rem; color: #fff; margin: 0; text-transform: uppercase; }
.program-baslik-kutusu h2 span { color: var(--primary); font-size: 1.2rem; display: block; margin-top: 5px; letter-spacing: 1px; }

/* "Programa Katıl" Butonu */
.btn-katil {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 700;
    transition: all 0.3s ease;
    text-transform: uppercase;
    display: flex; align-items: center; gap: 8px;
    cursor: pointer;
}
.btn-katil:hover {
    background: var(--primary);
    color: #000;
    box-shadow: 0 0 15px var(--primary);
    transform: translateX(-5px);
}

/* --- KART TASARIMLARI --- */
.grid-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.program-card { 
    background: #1a1a1a; 
    border: 1px solid #333; 
    border-radius: 12px; 
    padding: 30px; 
    display: flex; flex-direction: column; 
    transition: transform 0.3s ease, box-shadow 0.3s ease; 
    position: relative; overflow: hidden; 
}
.program-card:hover { 
    transform: translateY(-5px); 
    border-color: var(--primary); 
    box-shadow: 0 10px 30px rgba(0, 230, 64, 0.2); 
}

.discount-badge { 
    position: absolute; top: 15px; right: 15px; 
    background: var(--primary); color: #000; 
    padding: 5px 10px; font-size: 12px; font-weight: 800; 
    border-radius: 4px; box-shadow: 0 0 10px rgba(0,230,64,0.4);
}

.card-header h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 5px; color: #fff; }
.card-header p { font-size: 0.9rem; color: #888; margin-bottom: 20px; }

.price-area { margin-bottom: 25px; padding: 20px 0; border-top: 1px solid #333; border-bottom: 1px solid #333; }
.old-price { text-decoration: line-through; color: #666; font-size: 1.1rem; display: block; margin-bottom: 5px; }
.new-price { font-size: 2.2rem; font-weight: 700; color: var(--primary); letter-spacing: -1px; text-shadow: 0 0 10px rgba(0,230,64,0.2); }
.currency { font-size: 1rem; font-weight: 400; color: #ccc; }

.features-list li { margin-bottom: 10px; display: flex; align-items: center; color: #ccc; font-size: 0.95rem; }
.features-list li i { color: var(--primary); margin-right: 10px; font-size: 12px; text-shadow: 0 0 5px var(--primary); }

/* --- FOOTER --- */
footer { background: #050505; padding: 30px 5%; border-top: 1px solid #222; text-align: center; color: #666; margin-top: auto; }

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

/* ============================================================
   MOBİL UYUMLULUK (MEDIA QUERIES)
   ============================================================ */
@media (max-width: 768px) {
    /* Header & Nav */
    header { padding: 15px 20px; }
    .menu-toggle { display: block !important; position: relative; z-index: 2002; }

    nav {
        position: fixed; top: 0; right: -100%; width: 100%; 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; z-index: 2000;
    }
    nav.active { right: 0; }
    nav ul { flex-direction: column; gap: 30px; text-align: center; }
    nav ul li a { font-size: 1.5rem; color: #fff; }
    
    .btn-join { display: none; } /* Mobilde header butonu gizle */

    /* Program Başlıkları */
    .program-baslik-kutusu { flex-direction: column; gap: 15px; align-items: flex-start; }
    .btn-katil { width: 100%; justify-content: center; }

    /* Kartlar */
    .grid-container { grid-template-columns: 1fr; }
}