/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Nav */
header {
    background: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo a {
    font-size: 24px;
    font-weight: bold;
    color: #007bff;
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover, .nav-links a.active {
    color: #007bff;
}

/* Hero Section */
.hero {
    padding: 100px 0 60px;
    background: linear-gradient(135deg, #007bff 0%, #00d4ff 100%);
    color: #fff;
    text-align: center;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero .subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-buttons {
    margin-bottom: 50px;
}

.btn {
    display: inline-block;
    padding: 15px 35px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s, background 0.3s;
    margin: 0 10px;
}

.btn:hover {
    transform: translateY(-3px);
}

.btn-primary {
    background: #fff;
    color: #007bff;
}

.btn-secondary {
    background: transparent;
    border: 2px solid #fff;
    color: #fff;
}

.hero-image img {
    max-width: 80%;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

/* Features & Content */
section {
    padding: 80px 0;
}

.features h2, .seo-text h2 {
    font-size: 32px;
    margin-bottom: 30px;
    text-align: center;
    position: relative;
}

.features h2::after, .seo-text h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: #007bff;
    margin: 15px auto 0;
}

.feature-item {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.feature-item ul {
    list-style: none;
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.feature-item li {
    padding: 15px;
    background: #f1f8ff;
    border-radius: 8px;
}

.seo-text {
    background: #fff;
    margin-top: 40px;
    padding: 40px;
    border-radius: 10px;
}

.seo-text p {
    margin-bottom: 20px;
    font-size: 18px;
}

/* Footer */
footer {
    background: #333;
    color: #ccc;
    padding: 50px 0;
    text-align: center;
}

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

.footer-links a {
    color: #ccc;
    text-decoration: none;
    margin: 0 10px;
}

.friend-links {
    margin-top: 20px;
    font-size: 14px;
}

.friend-links a {
    color: #888;
    text-decoration: none;
    margin: 0 5px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 32px; }
    .nav-links { display: none; }
    .hero-image img { max-width: 100%; }
    .btn { width: 100%; margin: 10px 0; }
}

/* Download Section */
.download-section {
    text-align: center;
    padding: 60px 0;
}

.download-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
}

.download-card {
    background: #fff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    flex: 1;
    max-width: 400px;
    transition: transform 0.3s;
}

.download-card:hover {
    transform: translateY(-10px);
}

.download-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #007bff;
}

.download-card p {
    margin-bottom: 25px;
    color: #666;
}

/* FAQ & Guide Section */
.faq-section, .guide-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 0;
}

.faq-item, .guide-step {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.faq-item h3, .guide-step h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.faq-item p, .guide-step p {
    color: #555;
    line-height: 1.8;
}