:root {
    --primary-color: #007AFF;
    --text-color: #333;
    --bg-color: #fff;
    --secondary-bg: #f5f5f7;
    --border-color: #d2d2d7;
    --max-width: 1200px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-color);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    padding: 1rem 0;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    padding: 50px 0;
    text-align: center;
    background: linear-gradient(135deg, #0f4368 0%, #1e5a8a 100%);
    color: white;
}

.app-icon {
    width: 120px;
    height: 120px;
    margin-bottom: 2rem;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.hero 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: 600px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.download-btn {
    display: inline-block;
    background: white;
    color: #333;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* Features Section */
.features {
    padding: 50px 0;
    background: var(--secondary-bg);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    font-weight: 300;
    letter-spacing: -0.02em;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.feature {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.feature h3 {
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
}

.feature p {
    color: #666;
    font-size: 0.95rem;
}

/* How It Works Section */
.how-it-works {
    padding: 50px 0;
    background: white;
}

.how-it-works h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 300;
    letter-spacing: -0.02em;
}

.how-it-works-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
}

.how-it-works ol {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
    counter-reset: steps;
    list-style: none;
}

.how-it-works li {
    counter-increment: steps;
    margin-bottom: 1.5rem;
    padding-left: 3rem;
    position: relative;
    font-size: 1.1rem;
}

.how-it-works li::before {
    content: counter(steps);
    position: absolute;
    left: 0;
    top: 0;
    background: linear-gradient(135deg, #0f4368 0%, #1e5a8a 100%);
    color: white;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.app-screenshot {
    flex: 0 1 400px;
    max-width: 400px;
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

/* Requirements Section */
.requirements {
    padding: 80px 0;
    background: var(--secondary-bg);
}

.requirements h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.requirements ul {
    max-width: 400px;
    margin: 0 auto;
    list-style-position: inside;
}

.requirements li {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

/* Testimonials Section */
.testimonials {
    padding: 50px 0;
    background: var(--secondary-bg);
}

.testimonials h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 300;
    letter-spacing: -0.02em;
}

.testimonial {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.testimonial blockquote {
    background: white;
    padding: 3rem;
    border-radius: 16px;
    position: relative;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.testimonial blockquote::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary-color);
    position: absolute;
    top: -10px;
    left: 30px;
    font-weight: bold;
    opacity: 0.3;
}

.testimonial p {
    font-size: 1.4rem;
    font-style: italic;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    line-height: 1.6;
}

.testimonial cite {
    display: block;
    font-size: 1rem;
    color: #666;
    font-style: normal;
    margin-top: 1rem;
}

/* Support Section */
.support {
    padding: 50px 0;
    background: white;
}

.support h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 300;
    letter-spacing: -0.02em;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.support-item {
    background: var(--secondary-bg);
    padding: 2rem;
    border-radius: 12px;
}

.support-item h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.support-item p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.support-item ul {
    padding-left: 1.5rem;
    margin-top: 0.5rem;
}

.support-item li {
    margin-bottom: 0.5rem;
}

/* Content Pages (Privacy, Support) */
.content-page {
    padding: 60px 0;
    min-height: calc(100vh - 200px);
}

.content-page h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

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

.content-page h3 {
    font-size: 1.3rem;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

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

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

.content-page li {
    margin-bottom: 0.5rem;
}

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

.company-info {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: #666;
}

/* FAQ and Troubleshooting */
.faq, .troubleshooting {
    background: var(--secondary-bg);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.contact-info {
    background: var(--secondary-bg);
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 1rem;
}

/* Other Apps Section */
.other-apps {
    padding: 50px 0;
    background: var(--secondary-bg);
}

.other-apps h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 300;
    letter-spacing: -0.02em;
}

.other-apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.app-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 2rem;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.other-app-icon {
    width: 180px;
    height: 180px;
    flex-shrink: 0;
}

.app-content {
    flex: 1;
}

.app-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.app-tagline {
    color: #666;
    font-style: italic;
    margin-bottom: 1rem;
}

.app-card p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.app-links {
    display: flex;
    gap: 1rem;
}

.app-link {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.3s;
}

.app-link:hover {
    background: #0056b3;
}

/* Footer */
footer {
    background: var(--text-color);
    color: white;
    padding: 2rem 0;
    margin-top: auto;
}

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

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

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

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

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

    .tagline {
        font-size: 1.2rem;
    }

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

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

    .nav-links {
        font-size: 0.9rem;
        gap: 1rem;
    }
}