:root {
            --primary-color: #FF8C00;
            --secondary-color: #E74C3C;
            --accent-color: #FFAA00;
            --text-dark: #2c3e50;
            --text-light: #ecf0f1;
        }

        html {
            scroll-behavior: smooth; /* Sayfa içi linklere yumuşak kayma efekti */
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--text-dark);
            background: linear-gradient(135deg, #fff5f7, #f0f8ff, #f8f7ff);
            background-attachment: fixed;
        }

        .glass-panel {
            background: rgba(255, 255, 255, 0.25);
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
        }

        .header-area {
            padding: 15px 0;
            background: rgba(255, 255, 255, 0.2);
            -webkit-backdrop-filter: blur(5px);
            backdrop-filter: blur(5px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        }
header {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px;
}

.logo-link {
  display: inline-block;
}

.logo {
  width: 300px;
  max-width: 80%;
  height: auto;
  transition: width 0.3s ease;
}

/* Ekran küçüldükçe logo daralsın */
@media (max-width: 600px) {
  .logo {
    width: 180px;
  }
}

/* Büyük ekranlarda daha geniş olsun */
@media (min-width: 1024px) {
  .logo {
    width: 400px;
  }
}


        .section { padding: 60px 0; }

        .intro-panel {
            padding: 40px;
            border-radius: 20px;
            text-align: center;
        }

        .intro-title {
            color: var(--text-dark);
            margin-bottom: 20px;
            font-weight: 700;
            font-size: 2.5rem;
        }

        /* --- SEÇİM KUTULARI VE BUTON STİLLERİ --- */
        .selection-container {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 30px;
        }

        .form-select-glass {
            background-color: rgba(255, 255, 255, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.6);
            border-radius: 50px;
            padding: 12px 25px;
            font-weight: 600;
            color: var(--text-dark);
            min-width: 200px;
        }
        .form-select-glass:focus {
            box-shadow: 0 0 0 0.25rem rgba(255, 140, 0, 0.25);
            border-color: var(--primary-color);
        }

        .btn {
            border-radius: 50px;
            padding: 12px 30px;
            font-weight: 600;
            border: 2px solid transparent;
            transition: all 0.3s ease;
        }

        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            box-shadow: 0 4px 15px rgba(255, 140, 0, 0.3);
        }

        .btn-primary:hover {
            background-color: #e67e22;
            border-color: #e67e22;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 140, 0, 0.4);
        }

        /* --- SINIF KARTLARI STİLLERİ --- */
        .classes-section {
             padding-top: 20px; /* Üstteki boşluğu azalttık */
        }

        .class-card {
            border: none;
            border-radius: 20px;
            overflow: hidden;
            transition: all 0.3s ease;
            margin-bottom: 30px;
            background: rgba(255, 255, 255, 0.35);
            -webkit-backdrop-filter: blur(15px);
            backdrop-filter: blur(15px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
        }

        .class-card:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: 0 15px 40px rgba(0,0,0,0.15);
        }

        .class-card img {
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid rgba(255, 255, 255, 0.4);
        }

        .class-card-body {
            padding: 25px;
            background-color: transparent;
        }

        .class-card-title {
            color: var(--text-dark);
            font-weight: 700;
            font-size: 1.5rem;
        }
.selection-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 30px;
    padding: 20px;
    border-radius: 25px;
    background: linear-gradient(145deg, #ffe6e6, #e6f7ff, #fffbe6);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    border: 2px dashed #ffb347;
}


        /* --- SLIDER STİLLERİ --- */
        .slider-img { height: 400px; object-fit: cover; }
        .carousel-indicators [data-bs-target] { width: 12px; height: 12px; border-radius: 50%; background-color: #fff; opacity: 0.5; }
        .carousel-indicators .active { background-color: var(--primary-color); opacity: 1; }
        .carousel-control-prev, .carousel-control-next { width: 40px; height: 40px; top: 50%; transform: translateY(-50%); opacity: 0.6; }
        .carousel-control-prev:hover, .carousel-control-next:hover { opacity: 1; }

        /* --- MODAL (POPUP) SİSTEMİ STİLLERİ --- */
        #modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); z-index: 1050; overflow: hidden; }
        #modal-content { position: relative; width: 95%; height: 95%; margin: auto; top: 2.5%; background: white; border-radius: 15px; padding: 10px; box-shadow: 0 0 25px rgba(0,0,0,0.5); overflow: hidden; display: flex; flex-direction: column; }
        #modal-close-btn { position: absolute; top: 15px; right: 15px; font-size: 24px; background: #333; color: white; border: none; cursor: pointer; width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; z-index: 10; transition: transform 0.2s; }
        #modal-close-btn:hover { transform: scale(1.1); }
        /* DİKKAT: Buradaki 'object' yerine 'iframe' olarak değiştirildi */
        iframe#modal-frame { width: 100%; height: 100%; border: none; border-radius: 10px; } /* */

        /* --- FOOTER STİLLERİ --- */
        .footer { margin-top: 50px; color: var(--text-light); padding: 50px 0 20px; border-top-left-radius: 30px; border-top-right-radius: 30px; background: rgba(44, 62, 80, 0.8); -webkit-backdrop-filter: blur(15px); backdrop-filter: blur(15px); border: 1px solid rgba(255, 255, 255, 0.1); box-shadow: 0 -8px 32px 0 rgba(0, 0, 0, 0.15); }
        .footer-title { color: var(--accent-color); font-size: 1.2rem; margin-bottom: 20px; font-weight: 600; }
        .footer-links a { color: #bdc3c7; display: block; margin-bottom: 10px; text-decoration: none; transition: all 0.3s ease; }
        .footer-links a:hover { color: var(--accent-color); transform: translateX(5px); }
        .copyright { border-top: 1px solid rgba(255, 255, 255, 0.15); padding-top: 20px; margin-top: 30px; color: #95a5a6; }

        @media (max-width: 768px) {
            .intro-title { font-size: 1.8rem; }
            .selection-container { flex-direction: column; gap: 15px; }
            .slider-img { height: 250px; }
            .class-card:hover { transform: none; }
        }