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

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

/* Navbar */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
}

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

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    opacity: 0.8;
    text-decoration: underline;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 2rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Features Section */
.features {
    padding: 4rem 0;
    text-align: center;
}

.features h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.15);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.feature-card p {
    color: #666;
    line-height: 1.8;
}

/* About Section */
.about {
    padding: 4rem 0;
    text-align: center;
    background: white;
    border-radius: 15px;
    margin: 2rem 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.about h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #333;
}

.about p {
    font-size: 1.1rem;
    color: #666;
    max-width: 800px;
    margin: 1rem auto;
    line-height: 1.8;
    padding: 0 2rem;
}

/* Download Section */
.download {
    padding: 4rem 0;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px;
    margin: 2rem 0;
}

.download h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.download p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.download-button {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Content Pages (Privacy, Terms, Contact) */
.content-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.content-page h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.content-page h2 {
    font-size: 1.8rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

.content-page h3 {
    font-size: 1.4rem;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: #555;
}

.content-page p {
    margin-bottom: 1rem;
    color: #666;
    line-height: 1.8;
}

.content-page ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.content-page li {
    margin-bottom: 0.5rem;
    color: #666;
    line-height: 1.8;
}

.content-page a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.content-page a:hover {
    text-decoration: underline;
}

.last-updated {
    font-style: italic;
    color: #999;
    margin-bottom: 2rem;
}

/* Contact Form */
.contact-form {
    margin: 2rem 0;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #333;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.contact-info {
    margin-top: 3rem;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 10px;
}

.contact-info h3 {
    margin-bottom: 1rem;
    color: #667eea;
}

.contact-info p {
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    background: #2d3748;
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content p {
    margin-bottom: 0.5rem;
}

.footer-content a {
    color: #667eea;
    text-decoration: none;
}

.footer-content a:hover {
    text-decoration: underline;
}

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

    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .features h2,
    .about h2,
    .download h2 {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .content-page {
        padding: 2rem 1rem;
    }

    .content-page h1 {
        font-size: 2rem;
    }

    .content-page h2 {
        font-size: 1.5rem;
    }
}