/* TEMEL STİLLER VE DEĞİŞKENLER */
:root {
    --primary-color: #003366;
    --secondary-color: #0059b3;
    --accent-color: #ff6b00;
    --light-color: #f4f6f9;
    --dark-color: #333;
    --text-color: #444;
    --white: #fff;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-accent: linear-gradient(135deg, var(--accent-color), #ff8c33);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Navigasyon yüksekliği kadar boşluk */
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    margin: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.bg-light {
    background-color: var(--light-color);
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 107, 0, 0.3);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background-color: transparent;
    color: var(--white);
}

/* Klavye kullanıcıları için odaklanma stili */
a:focus-visible, button:focus-visible, .btn:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
    border-radius: 4px;
}

/* NAVİGASYON */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: top 0.3s;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}
.logo i {
    margin-right: 8px;
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 25px;
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--primary-color);
    cursor: pointer;
}


/* HEADER */
.modern-header {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-top: 70px; /* Sabit navigasyon için */
}

.modern-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiPjxkZWZzPjxwYXR0ZXJuIGlkPSJwYXR0ZXJuIiB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHBhdHRlcm5Vbml0cz0idXNlclNwYWNlT25Vc2UiIHBhdHRlcm5UcmFuc2Zvcm09InJvdGF0ZSg0NSkiPjxyZWN0IHdpZHRoPSIyMCIgaGVpZ2h0PSIyMCIgZmlsbD0icmdiYSgyNTUsMjU5LDI1NSwwLjAzKSIvPjwvcGF0dGVybj48L2RlZnM+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0idXJsKCNwYXR0ZXJuKSIvPjwvc3ZnPg==');
    opacity: 0.5;
}

.modern-header-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.modern-header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
}

.modern-header p {
    font-size: 1.3rem;
    margin-bottom: 35px;
    opacity: 0.9;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.modern-header-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 35px;
}

.modern-header-icon-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 60px;
    position: relative;
}

.modern-header-icon {
    width: 100px;
    height: 100px;
    background-color: var(--white);
    border-radius: 50%;
    margin: 0 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 2;
}

.modern-header-icon-container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(255, 255, 255, 0.3);
    z-index: 1;
}

/* KART STİLLERİ */
.modern-card {
    background-color: var(--white);
    border-radius: 16px;
    padding: 35px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.modern-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
}

.modern-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

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

.modern-feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 20px;
    font-size: 2rem;
    transition: var(--transition);
}

.modern-card:hover .modern-feature-icon {
    transform: scale(1.1);
    background: var(--gradient-accent);
}

.modern-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}
.modern-card p {
    font-size: 0.95rem;
}


/* BÖLÜM BAŞLIKLARI */
.modern-section-title {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.modern-section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
    font-weight: 700;
}

.modern-section-title h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: var(--gradient-primary);
    border-radius: 3px;
}

.modern-section-title p {
    max-width: 700px;
    margin: 30px auto 0;
    color: var(--text-color);
    font-size: 1.1rem;
}

/* FİYATLANDIRMA KARTLARI */
.modern-pricing-card {
    background-color: var(--white);
    border-radius: 16px;
    box-shadow: var(--box-shadow);
    width: 100%;
    max-width: 350px;
    padding: 40px 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    margin: 0 auto;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.modern-pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-primary);
}

.modern-pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.modern-pricing-card .icon-placeholder {
    width: 100px;
    height: 100px;
    background-color: var(--light-color);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modern-pricing-card:hover .icon-placeholder {
    background: var(--gradient-primary);
}

.modern-pricing-card .icon-placeholder img {
    width: 60%;
    height: 60%;
    object-fit: contain;
}

.modern-pricing-card h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.modern-pricing-card .student-limit {
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 25px;
    padding: 8px 15px;
    background-color: var(--light-color);
    border-radius: 20px;
    display: inline-block;
}

.modern-pricing-card .features-list {
    list-style: none;
    padding-left: 0;
    text-align: left;
    margin-bottom: 30px;
}

.modern-pricing-card .features-list li {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.modern-pricing-card .features-list li i {
    margin-right: 12px;
    font-size: 1.1rem;
    min-width: 20px;
}

.modern-pricing-card .features-list li.supported .fa-check-circle { color: #28a745; }
.modern-pricing-card .features-list li.unsupported .fa-times-circle { color: #dc3545; }

.modern-pricing-card .price {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.modern-pricing-card .price small {
    font-size: 1rem;
    font-weight: 400;
    margin-top: 10px;
    margin-left: 5px;
}

.modern-pricing-card .duration {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: 30px;
}

/* GRİD DÜZENİ */
.modern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 35px;
}


/* KULLANICI YORUMLARI */
.modern-testimonial-card {
    background-color: var(--light-color);
    padding: 35px;
    border-radius: 16px;
    box-shadow: var(--box-shadow);
    position: relative;
    transition: var(--transition);
}

.modern-testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.modern-testimonial-card::before {
    content: '\201C';
    font-size: 6rem;
    color: rgba(0, 83, 179, 0.1);
    position: absolute;
    top: 10px;
    left: 20px;
    font-family: serif;
    line-height: 1;
}

.modern-testimonial-content {
    position: relative;
    z-index: 1;
    margin-bottom: 25px;
    font-style: italic;
}

.modern-testimonial-author { display: flex; align-items: center; }
.modern-author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 15px;
    border: 3px solid var(--white);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}
.modern-author-avatar img { width: 100%; height: 100%; object-fit: cover; }
.modern-author-info h4 { margin: 0 0 5px; font-size: 1.1rem; color: var(--primary-color); }
.modern-author-info p { margin: 0; color: var(--text-color); opacity: 0.8; font-size: 0.9rem; }


/* CTA BÖLÜMÜ */
.modern-cta {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 90px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.modern-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiPjxkZWZzPjxwYXR0ZXJuIGlkPSJwYXR0ZXJuIiB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHBhdHRlcm5Vbml0cz0idXNlclNwYWNlT25Vc2UiIHBhdHRlcm5UcmFuc2Zvcm09InJvdGF0ZSg0NSkiPjxyZWN0IHdpZHRoPSIyMCIgaGVpZ2h0PSIyMCIgZmlsbD0icmdiYSgyNTUsMjU1LDI1NSwwLjA1KSIvPjwvc3ZnPg==');
    opacity: 0.3;
}

.modern-cta-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.modern-cta h2 { font-size: 2.5rem; margin-bottom: 20px; color: var(--white); font-weight: 700; }
.modern-cta p { margin-bottom: 35px; font-size: 1.2rem; opacity: 0.9; max-width: 600px; margin-left: auto; margin-right: auto; }


/* FOOTER */
footer#contact {
    background-color: var(--primary-color);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--white);
    text-decoration: underline;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    color: var(--white);
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.social-links a:hover {
    transform: scale(1.2);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-bottom p {
    margin: 0;
}


/* ANİMASYONLAR */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}


/* MOBİL UYUMLULUK (RESPONSIVE) */
@media (max-width: 992px) {
    .modern-header h1 { font-size: 2.5rem; }
    .modern-header p { font-size: 1.1rem; }
    .modern-section-title h2 { font-size: 2rem; }
    
    .nav-links {
        position: absolute;
        top: 70px; /* Navigasyon yüksekliği */
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 10px 10px rgba(0,0,0,0.1);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease-out;
    }

    .nav-links.active {
        max-height: 500px; /* İçeriğe göre ayarlanabilir */
    }

    .nav-links li {
        width: 100%;
        text-align: center;
    }

    .nav-links a {
        padding: 15px 0;
        display: block;
        width: 100%;
    }
    
    .mobile-menu-btn { display: block; }
}

@media (max-width: 768px) {
    .modern-header { padding: 80px 0 60px; }
    .modern-header h1 { font-size: 2rem; }
    .modern-header-icon { width: 80px; height: 80px; font-size: 1.5rem; margin: 0 20px; }
    .modern-header-buttons { flex-direction: column; gap: 15px; }
    .modern-header-buttons .btn { width: 100%; max-width: 300px; margin: 0 auto; }
    .modern-section-title h2 { font-size: 1.8rem; }
    .modern-grid { grid-template-columns: 1fr; gap: 25px; }
    .modern-card, .modern-pricing-card { padding: 25px; }
}

@media (max-width: 576px) {
    .modern-header h1 { font-size: 1.8rem; }
    .modern-header p { font-size: 1rem; }
    .modern-feature-icon { width: 70px; height: 70px; font-size: 1.7rem; }
    .modern-testimonial-card, .modern-cta { padding: 25px; }
    .modern-cta h2 { font-size: 2rem; }
    .modern-cta p { font-size: 1rem; }
}
/* =================================
   ALT MENÜ (DROPDOWN) STİLLERİ
   ================================= */

/* 1. Genel Dropdown Ayarları */
.has-dropdown {
    position: relative; 
}

.dropdown-icon {
    font-size: 0.7em;
    margin-left: 5px;
    transition: transform 0.3s ease;
}

.dropdown-menu {
    list-style: none;
    padding: 10px 0;
    margin: 0;
    border-radius: 8px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    width: 220px;
    background-color: var(--white); /* Arka planı garantiliyor */
}

.dropdown-menu li a {
    padding: 10px 20px;
    display: block;
    color: var(--primary-color);
    font-size: 0.9rem;
    white-space: nowrap; 
}

.dropdown-menu li a:hover {
    background-color: var(--light-color);
}

.dropdown-menu li a::after {
    display: none;
}


/* 2. Masaüstü Görünümü (Hover ile açılır) - KRİTİK DÜZELTME */
@media (min-width: 993px) {
    .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 0;
        margin-top: 10px;
        
        /* BU KISIM ÖNEMLİ: Başlangıçta menüyü tamamen gizler ve akıştan çıkarır */
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
    }

    .has-dropdown:hover > .dropdown-menu {
        /* Hover durumunda menüyü görünür yapar */
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .has-dropdown:hover > a .dropdown-icon {
        transform: rotate(180deg);
    }
}


/* 3. Mobil Görünüm (Tıklama ile açılır) */
@media (max-width: 992px) {
    /* Mobil görünüm için ana menü linklerinin düzenlenmesi */
    .nav-links li a {
        justify-content: space-between;
    }
    
    .dropdown-menu {
        width: 100%;
        box-shadow: none;
        border-radius: 0;
        background-color: #f8f9fa;
        padding-left: 30px; 
        
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease-out, padding 0.4s ease-out;
        padding-top: 0;
        padding-bottom: 0;
    }

    .has-dropdown.dropdown-active > .dropdown-menu {
        max-height: 500px;
        padding-top: 10px;
        padding-bottom: 10px;
    }
    
    .has-dropdown.dropdown-active > a .dropdown-icon {
        transform: rotate(180deg);
    }
}