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

:root {
    --primary-color: #1a365d;
    --secondary-color: #2b6cb0;
    --accent-color: #4299e1;
    --text-color: #2d3748;
    --light-bg: #f7fafc;
    --white: #ffffff;
    --gray: #718096;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

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

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    text-align: center;
    padding: 100px 20px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.tagline {
    font-size: 1.4rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* About Section */
.about {
    padding: 100px 20px;
    background: var(--white);
}

.about h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 40px;
}

.about p {
    max-width: 800px;
    margin: 0 auto 20px;
    font-size: 1.1rem;
    text-align: center;
}

/* Services Section */
.services {
    padding: 100px 20px;
    background: var(--light-bg);
}

.services h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 50px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.service-card h3 {
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.service-card p {
    color: var(--gray);
}

/* Support Section */
.support {
    padding: 100px 20px;
    background: var(--white);
}

.support h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.support > .container > p {
    text-align: center;
    margin-bottom: 50px;
    font-size: 1.1rem;
}

.support-info,
.support-tips {
    max-width: 600px;
    margin: 0 auto 40px;
    padding: 30px;
    background: var(--light-bg);
    border-radius: 10px;
}

.support-info h3,
.support-tips h3 {
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.support-info a {
    color: var(--accent-color);
    text-decoration: none;
}

.support-info a:hover {
    text-decoration: underline;
}

.support ul {
    padding-left: 20px;
}

.support li {
    margin-bottom: 10px;
}

/* Privacy Section */
.privacy {
    padding: 100px 20px;
    background: var(--light-bg);
}

.privacy h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.updated {
    text-align: center;
    color: var(--gray);
    margin-bottom: 50px;
}

.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.privacy-content h3 {
    color: var(--secondary-color);
    margin: 30px 0 15px;
}

.privacy-content h3:first-child {
    margin-top: 0;
}

.privacy-content ul {
    padding-left: 20px;
}

.privacy-content li {
    margin-bottom: 10px;
}

/* Contact Section */
.contact {
    padding: 100px 20px;
    background: var(--white);
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 50px;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.contact-item {
    text-align: center;
    padding: 30px 40px;
    background: var(--light-bg);
    border-radius: 10px;
}

.contact-item h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.contact-item a {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 1.1rem;
}

.contact-item a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 30px 20px;
}

footer p {
    opacity: 0.9;
}

/* Products Page Hero */
.products-hero {
    padding: 150px 20px 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    text-align: center;
}

.products-hero h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
}

.products-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Section Subtitle */
.section-subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 50px;
    font-size: 1.1rem;
}

/* App Screenshots Section */
.app-screenshots {
    padding: 80px 20px;
    background: var(--white);
}

.app-screenshots h2 {
    text-align: center;
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1100px;
    margin: 0 auto;
}

.screenshot-item {
    text-align: center;
}

.screenshot-item img {
    width: 100%;
    max-width: 250px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    margin-bottom: 15px;
}

.screenshot-item h4 {
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.screenshot-item p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* Features Section */
.features {
    padding: 80px 20px;
    background: var(--light-bg);
}

.features h2 {
    text-align: center;
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    max-width: 1100px;
    margin: 0 auto;
}

.feature-card {
    background: var(--white);
    padding: 30px 25px;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.feature-card h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-size: 1.15rem;
}

.feature-card p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* App Flavors Section */
.app-flavors {
    padding: 80px 20px;
    background: var(--white);
}

.app-flavors h2 {
    text-align: center;
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.app-card {
    background: var(--light-bg);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.app-icon {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.app-icon-placeholder {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.app-icon-placeholder span {
    color: var(--white);
    font-size: 2.5rem;
    font-weight: 700;
}

.app-card h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.app-description {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.5;
}

.app-links {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.store-badge {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.store-badge:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

.store-badge.ios {
    background: #000;
    color: #fff;
}

.store-badge.android {
    background: #3ddc84;
    color: #000;
}

.coming-soon {
    display: inline-block;
    padding: 10px 20px;
    background: var(--gray);
    color: var(--white);
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
}

.screenshots-single {
    grid-template-columns: 1fr;
    justify-items: center;
}

.screenshots-single .screenshot-item img {
    max-width: 300px;
}

/* Active Nav Link */
.nav-links a.active {
    color: var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 3px;
}

/* CTA Section */
.cta-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    text-align: center;
}

.cta-section h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
}

.cta-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

.cta-section .cta-button {
    background: var(--white);
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    .tagline {
        font-size: 1.1rem;
    }

    .about h2,
    .services h2,
    .support h2,
    .privacy h2,
    .contact h2 {
        font-size: 2rem;
    }

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

    .contact-info {
        flex-direction: column;
        gap: 20px;
    }

    .privacy-content {
        padding: 25px;
    }

    /* Products page responsive */
    .products-hero h1 {
        font-size: 2rem;
    }

    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .screenshot-item img {
        max-width: 180px;
    }

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

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

    .app-screenshots h2,
    .features h2,
    .app-flavors h2,
    .cta-section h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.6rem;
    }

    .logo {
        font-size: 1.1rem;
    }
}