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

:root {
    --primary: #3B82F6;
    --primary-dark: #1D4ED8;
    --primary-light: #60A5FA;
    --secondary: #10B981;
    --accent: #8B5CF6;
    --text-dark: #1F2937;
    --text-light: #6B7280;
    --background: #FFFFFF;
    --surface: #F8FAFC;
    --border: #E5E7EB;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background: var(--gradient);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--background);
    border-radius: 20px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 50px 40px 30px;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="rgba(255,255,255,0.1)"><polygon points="1000,100 1000,0 0,100"/></svg>');
    background-size: cover;
}

.header-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5em;
    font-weight: 700;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.2);
    padding: 12px 24px;
    border-radius: 50px;
    backdrop-filter: blur(10px);
}

.logo i {
    font-size: 1.3em;
}

.header h1 {
    font-size: 3em;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #fff, #E0F2FE);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.last-updated {
    font-size: 1.1em;
    opacity: 0.9;
}

.header-graphic {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.graphic-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.9;
}

.graphic-item i {
    font-size: 1.5em;
}

/* Quick Navigation */
.quick-nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-items {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    padding: 0 20px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: white;
    border: 2px solid var(--border);
    border-radius: 50px;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-item:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Policy Sections */
.content {
    padding: 40px;
}

.policy-section {
    margin-bottom: 50px;
    background: var(--surface);
    border-radius: 15px;
    padding: 40px;
    border-left: 5px solid var(--primary);
    transition: all 0.6s ease;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.section-header i {
    font-size: 2em;
    color: var(--primary);
    background: white;
    padding: 15px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.section-header h2 {
    font-size: 2em;
    color: var(--text-dark);
    font-weight: 700;
}

/* Feature Highlight */
.feature-highlight {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-item i {
    font-size: 2em;
    color: var(--primary);
    background: var(--surface);
    padding: 15px;
    border-radius: 10px;
}

.feature-item h4 {
    color: var(--text-dark);
    margin-bottom: 5px;
}

.feature-item p {
    color: var(--text-light);
    font-size: 0.9em;
}

/* Info Cards */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.info-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
    border-top: 4px solid var(--primary);
}

.info-card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 3em;
    color: var(--primary);
    margin-bottom: 20px;
}

.info-card h3 {
    color: var(--text-dark);
    margin-bottom: 15px;
    font-size: 1.3em;
}

.info-card ul {
    list-style: none;
    text-align: left;
}

.info-card li {
    padding: 8px 0;
    color: var(--text-light);
    border-bottom: 1px solid var(--border);
}

.info-card li:last-child {
    border-bottom: none;
}

.info-card li::before {
    content: '✓';
    color: var(--secondary);
    font-weight: bold;
    margin-right: 10px;
}

/* Usage Grid */
.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.usage-item {
    background: white;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.usage-item:hover {
    transform: translateY(-5px);
}

.usage-item i {
    font-size: 2.5em;
    color: var(--primary);
    margin-bottom: 15px;
    background: var(--surface);
    padding: 15px;
    border-radius: 10px;
}

.usage-item h4 {
    color: var(--text-dark);
    margin-bottom: 10px;
    font-size: 1.1em;
}

.usage-item p {
    color: var(--text-light);
    font-size: 0.9em;
}

/* Service Cards */
.service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.service-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.service-card.google::before { background: var(--primary); }
.service-card.firebase::before { background: var(--secondary); }
.service-card.expo::before { background: var(--accent); }

.service-card:hover {
    transform: translateY(-5px);
}

.service-card i {
    font-size: 3em;
    margin-bottom: 20px;
}

.service-card.google i { color: var(--primary); }
.service-card.firebase i { color: var(--secondary); }
.service-card.expo i { color: var(--accent); }

.service-card h4 {
    color: var(--text-dark);
    margin-bottom: 10px;
    font-size: 1.2em;
}

.service-card p {
    color: var(--text-light);
    margin-bottom: 15px;
    font-size: 0.9em;
}

.service-badge {
    background: var(--surface);
    color: var(--text-light);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8em;
    font-weight: 600;
}

/* Security Features */
.security-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.security-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.security-item:hover {
    transform: translateY(-5px);
}

.security-item i {
    font-size: 2em;
    color: var(--primary);
    background: var(--surface);
    padding: 15px;
    border-radius: 10px;
    flex-shrink: 0;
}

.security-item h4 {
    color: var(--text-dark);
    margin-bottom: 5px;
}

.security-item p {
    color: var(--text-light);
    font-size: 0.9em;
}

/* Rights Grid */
.rights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.right-item {
    background: white;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.right-item:hover {
    transform: translateY(-5px);
}

.right-item i {
    font-size: 2.5em;
    color: var(--primary);
    margin-bottom: 15px;
    background: var(--surface);
    padding: 15px;
    border-radius: 10px;
}

.right-item h4 {
    color: var(--text-dark);
    margin-bottom: 10px;
    font-size: 1.1em;
}

.right-item p {
    color: var(--text-light);
    font-size: 0.9em;
}

/* Contact Section */
.contact-section {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.contact-section .section-header i {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.contact-section .section-header h2 {
    color: white;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-card i {
    font-size: 2.5em;
    margin-bottom: 20px;
    opacity: 0.9;
}

.contact-card h4 {
    margin-bottom: 10px;
    font-size: 1.3em;
}

.contact-card p {
    margin-bottom: 20px;
    opacity: 0.9;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: white;
    color: var(--primary);
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.contact-btn:hover {
    background: var(--surface);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 40px;
    text-align: center;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3em;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer p {
    opacity: 0.8;
    margin-bottom: 15px;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin: 20px 0;
    flex-wrap: wrap;
}

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

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

.footer-links span {
    opacity: 0.5;
}

.copyright {
    opacity: 0.6;
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        border-radius: 15px;
    }

    .header {
        padding: 30px 20px 20px;
    }

    .header h1 {
        font-size: 2.2em;
    }

    .content {
        padding: 20px;
    }

    .policy-section {
        padding: 25px;
        margin-bottom: 30px;
    }

    .section-header {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }

    .section-header h2 {
        font-size: 1.6em;
    }

    .nav-items {
        flex-direction: column;
        align-items: center;
    }

    .nav-item {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }

    .feature-highlight,
    .info-cards,
    .usage-grid,
    .service-cards,
    .security-features,
    .rights-grid,
    .contact-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8em;
    }

    .logo {
        font-size: 1.2em;
    }

    .policy-section {
        padding: 20px;
    }

    .feature-item,
    .info-card,
    .usage-item,
    .service-card,
    .security-item,
    .right-item,
    .contact-card {
        padding: 20px;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}