:root {
    --primary-color: #2ecc71;
    --secondary-color: #27ae60;
    --text-color: #333;
    --background-color: #f9f9f9;
    --accent-color: #3498db;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

/* Header and Navigation */
header {
    background-color: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: var(--text-color);
    transition: color var(--transition-speed);
}

nav a:hover, nav a.active {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
}

.o-nama {
    max-width: 800px;
}

.o-nama h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Content */
.content {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 1rem;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform var(--transition-speed);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card img {
    max-width: 100%;
    height: auto;
    margin-bottom: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color var(--transition-speed);
    border: none;
    cursor: pointer;
}

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

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

.btn.decline {
    background-color: #e74c3c;
}

/* Feedback Section */
.feedback {
    text-align: center;
    padding: 4rem 1rem;
    background-color: white;
}

.feedback-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Contact Section */
.contact {
    background-color: #333;
    color: white;
    padding: 4rem 1rem;
}

.contact-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.contact-info {
    margin: 2rem 0;
}

.social-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.social-link {
    color: white;
    text-decoration: none;
    transition: color var(--transition-speed);
}

.social-link:hover {
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }
}