:root {
    --primary-color: #2563eb;
    --secondary-color: #f0f9ff;
    --text-color: #1e293b;
    --light-text: #64748b;
    --border-color: #e2e8f0;
    --white: #ffffff;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--white);
    color: var(--text-color);
    line-height: 1.5;
    padding-top: 60px; /* Navbar yüksekliği kadar padding */
}

/* Navbar temel stilleri */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    z-index: 1000;
}

/* Logo/Marka stili */
.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
    text-decoration: none;
    transition: color 0.3s ease;
}

/* Ana menü container'ı */
.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

/* Menü linkleri */
.nav-link {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: #3498db;
    background: rgba(52, 152, 219, 0.1);
}

/* Dropdown menü container'ı */
.nav-item {
    position: relative;
}

/* Dropdown menü */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    padding: 0.5rem;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Dropdown menü öğeleri */
.dropdown-item {
    display: block;
    padding: 0.75rem 1rem;
    color: #2c3e50;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.dropdown-item:hover {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
    transform: translateX(5px);
}

/* Hamburger menü (mobil) */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 10px;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background: #2c3e50;
    transition: all 0.3s ease;
}

/* Modern Hero Section */
.hero-section {
    padding: 8rem 2rem 6rem;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    line-height: 1.2;
    animation: slideUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--light-text);
    margin-bottom: 2.5rem;
    animation: slideUp 0.8s ease 0.2s;
    animation-fill-mode: both;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    animation: slideUp 0.8s ease 0.4s;
    animation-fill-mode: both;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

/* Features Section */
.features-section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--white);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px var(--shadow);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.feature-text {
    color: var(--light-text);
    line-height: 1.6;
}

/* Animasyonlar */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Tasarım */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
        flex-direction: column;
        gap: 6px;
        cursor: pointer;
        padding: 10px;
        z-index: 1001;
    }
    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        gap: 1rem;
        padding: 1rem 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    }
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .nav-link {
        width: 100%;
        text-align: center;
        padding: 0.75rem 0;
        border-bottom: none;
        font-size: 1rem;
        background: none;
    }
    .dropdown-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        padding: 0;
        margin-top: 0;
        display: none;
        background: none;
    }
    .nav-item.active .dropdown-menu {
        display: block;
    }
    .dropdown-item {
        padding: 10px 0;
        width: 100%;
        background: none;
        border-radius: 0;
        color: #2c3e50;
        font-size: 1rem;
        border-bottom: none;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-subtitle {
        font-size: 1.1rem;
    }
    .features-section {
        padding: 4rem 1rem;
    }
}

/* Footer Stili */
.footer {
    background-color: var(--secondary-color);
    padding: 40px 0;
    margin-top: 50px;
}

.footer-content {
    text-align: center;
}

.social-links {
    margin-bottom: 20px;
}

.social-link {
    color: var(--text-color);
    font-size: 24px;
    margin: 0 10px;
    transition: all 0.3s ease;
}

.social-link:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

.copyright {
    color: #666;
    font-size: 14px;
}

/* Sayfa içerik container'ı */
.page-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Form stilleri */
.form-container {
    background-color: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
}

.form-title {
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--white);
    color: var(--text-color);
}

/* Soru kartları */
.question-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px var(--shadow);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.question-info h3 {
    color: var(--text-color);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.question-details {
    color: var(--light-text);
    font-size: 0.9rem;
}

/* Video kartları (TYT/AYT sayfaları için) */
.video-container {
    background-color: var(--white);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 4px var(--shadow);
}

.video-title {
    color: var(--text-color);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 8px;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Butonlar */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

/* Responsive düzenlemeler */
@media (max-width: 768px) {
    .page-container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

.grade-boxes {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

.grade-box {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-decoration: none;
    color: #2c3e50;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 200px;
}

.grade-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.grade-box i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #3498db;
}

.grade-box h3 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

@media (max-width: 768px) {
    .grade-boxes {
        flex-direction: column;
        align-items: center;
    }
    
    .grade-box {
        width: 80%;
        max-width: 300px;
    }
}