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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 600;
    color: #007AFF;
}

.app-icon {
    font-size: 1.5rem;
}

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

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #007AFF;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #007AFF 0%, #0051D5 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

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

.tagline {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.95;
}

.description {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.9;
}

/* Features Section */
.features {
    padding: 4rem 0;
    background-color: #fff;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1a1a1a;
}

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

.feature-card {
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* Use Cases Section */
.use-cases {
    padding: 4rem 0;
    background-color: #f8f9fa;
}

.use-cases h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1a1a1a;
}

.use-case-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.use-case-item {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #007AFF;
}

.use-case-item strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.use-case-item p {
    color: #666;
    font-size: 0.95rem;
}

/* App Info Section */
.app-info {
    padding: 4rem 0;
    background-color: #fff;
}

.app-info h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1a1a1a;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.info-item strong {
    color: #007AFF;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-item span {
    color: #333;
    font-size: 1.1rem;
}

/* Privacy Section */
.privacy-section {
    padding: 4rem 0;
    background-color: #007AFF;
    color: white;
    text-align: center;
}

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

.privacy-section p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.95;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: white;
    color: #007AFF;
}

.btn-primary:hover {
    background-color: #f0f0f0;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* Content Page (Privacy Policy) */
.content-page {
    padding: 3rem 0;
    background-color: #fff;
}

.content-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.content-container h1 {
    color: #1a1a1a;
    border-bottom: 3px solid #007AFF;
    padding-bottom: 10px;
    margin-bottom: 1rem;
}

.content-container h2 {
    color: #333;
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.75rem;
}

.content-container h3 {
    color: #555;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.content-container p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.content-container ul,
.content-container ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.content-container li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.last-updated {
    color: #666;
    font-style: italic;
    margin-bottom: 2rem;
}

.important {
    background-color: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 4px;
}

.important p {
    margin-bottom: 0.5rem;
}

.important p:last-child {
    margin-bottom: 0;
}

.contact-info {
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: 5px;
    margin-top: 2rem;
}

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

.contact-info p:last-child {
    margin-bottom: 0;
}

/* Footer */
footer {
    background-color: #1a1a1a;
    color: #fff;
    padding: 2rem 0;
    margin-top: 4rem;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-nav {
    display: flex;
    gap: 2rem;
}

.footer-nav a {
    color: #fff;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-nav a:hover {
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1.25rem;
    }

    .description {
        font-size: 1rem;
    }

    .features h2,
    .use-cases h2,
    .app-info h2 {
        font-size: 2rem;
    }

    .feature-grid,
    .use-case-list,
    .info-grid {
        grid-template-columns: 1fr;
    }

    .nav-menu {
        gap: 1rem;
    }

    footer .container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .content-container {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 0;
    }

    .hero-content h1 {
        font-size: 1.75rem;
    }

    .tagline {
        font-size: 1.1rem;
    }

    .features,
    .use-cases,
    .app-info,
    .privacy-section {
        padding: 2rem 0;
    }

    .nav-brand {
        font-size: 1rem;
    }

    .nav-menu {
        font-size: 0.9rem;
    }
}