body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

header .logo h1 {
    margin: 0;
    font-size: 1.8rem;
}

header .main-nav p {
    margin: 0;
    font-size: 0.9rem;
}

header .user-auth {
    display: flex;
    gap: 10px;
    align-items: center;
}

header .user-auth input {
    padding: 8px;
    border: none;
    border-radius: 4px;
}

header .user-auth button {
    background-color: #5cb85c;
    color: white;
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

header .user-auth button:hover {
    background-color: #4cae4c;
}

main {
    padding: 2rem;
    max-width: 1200px;
    margin: 20px auto;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
}

section {
    margin-bottom: 3rem;
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
}

section:last-child {
    border-bottom: none;
}

h2, h3 {
    color: #007bff;
    text-align: center;
    margin-bottom: 1.5rem;
}

.hero-section {
    text-align: center;
    padding: 3rem 0;
    background-color: #e9f7ff;
    border-radius: 5px;
}

.hero-section p {
    font-size: 1.1rem;
    color: #555;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    background: #000;
    margin: 0 auto;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.features-section ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.features-section li {
    background-color: #f9f9f9;
    padding: 1rem;
    border-left: 5px solid #007bff;
    margin-bottom: 5px;
    border-radius: 4px;
}

.contact-forms {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}

.demo-request, .direct-contact {
    flex: 1;
    min-width: 300px;
    background-color: #f9f9f9;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.demo-request form input,
.demo-request form textarea {
    width: calc(100% - 20px);
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.demo-request form button {
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
    width: 100%;
}

.demo-request form button:hover {
    background-color: #0056b3;
}

.direct-contact p {
    margin-bottom: 10px;
}

.whatsapp-btn, .email-btn {
    display: inline-block;
    background-color: #25d366; /* WhatsApp yeşili */
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    margin-right: 10px;
    margin-bottom: 10px;
    transition: background-color 0.3s ease;
}

.whatsapp-btn:hover {
    background-color: #1da851;
}

.email-btn {
    background-color: #dc3545; /* Kırmızımsı ton */
}

.email-btn:hover {
    background-color: #c82333;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background-color: #333;
    color: #fff;
    margin-top: 2rem;
    border-radius: 0 0 8px 8px;
}

/* Responsive Düzenlemeler */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    header .user-auth {
        width: 100%;
        justify-content: center;
    }
    .contact-forms {
        flex-direction: column;
    }
    .demo-request, .direct-contact {
        min-width: unset;
        width: 100%;
    }
}