/* Reset ve Temel Stiller */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    color: #333;
    line-height: 1.6;
    background: #f8f9fc;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header ve Navigasyon */
header {
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #2563eb, #0d9488);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
}

.nav-links a {
    margin-left: 24px;
    text-decoration: none;
    color: #4b5563;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #2563eb;
}

.btn-outline {
    border: 2px solid #2563eb;
    padding: 8px 20px;
    border-radius: 30px;
    background: transparent;
    color: #2563eb !important;
}

.btn-outline:hover {
    background: #2563eb;
    color: white !important;
}

/* Hero Bölümü */
.hero {
    background: linear-gradient(135deg, #2563eb 0%, #0d9488 100%);
    color: white;
    padding: 80px 0;
    border-radius: 0 0 40px 40px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.9;
}

.btn-primary {
    background: white;
    color: #2563eb;
    padding: 12px 32px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.hero-image {
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    backdrop-filter: blur(10px);
}

/* Özellikler Bölümü */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: #6b7280;
    margin-bottom: 48px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: white;
    padding: 32px;
    border-radius: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

/* Footer */
footer {
    background: #1f2937;
    color: #9ca3af;
    padding: 48px 0;
    margin-top: 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.footer-col h4 {
    color: white;
    margin-bottom: 16px;
}

.footer-col a {
    color: #9ca3af;
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
}

.copyright {
    text-align: center;
    padding-top: 40px;
    margin-top: 40px;
    border-top: 1px solid #374151;
}

/* Form Stilleri (Kayıt, Giriş vs.) */
.form-container {
    max-width: 500px;
    margin: 60px auto;
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.form-container h2 {
    margin-bottom: 24px;
}

input, textarea, select {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 16px;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    font-size: 16px;
    transition: border 0.2s;
}

input:focus, textarea:focus {
    outline: none;
    border-color: #2563eb;
}

button, .btn-submit {
    background: #2563eb;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    transition: background 0.2s;
}

button:hover {
    background: #1d4ed8;
}

.error {
    background: #fee2e2;
    color: #dc2626;
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.success {
    background: #d1fae5;
    color: #10b981;
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 16px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .header-container {
        flex-direction: column;
        gap: 12px;
    }
    
    .nav-links a {
        margin: 0 12px;
    }
    
    .section {
        padding: 48px 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}