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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Navigation */
.navbar {
    background: #2196F3;
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(33, 150, 243, 0.3);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    transition: color 0.3s ease;
}

.logo-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-links li {
    list-style: none;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease, background-color 0.3s ease;
    padding: 8px 12px;
    border-radius: 4px;
}

.nav-links a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Navigation Theme Classes - Light theme for white backgrounds */
.navbar.navbar-light {
    background: rgba(255, 255, 255, 0.95) !important;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.navbar.navbar-light .nav-logo {
    color: #333333 !important;
}

.navbar.navbar-light .nav-links a {
    color: #333333 !important;
}

.navbar.navbar-light .nav-links a:hover {
    color: #000000 !important;
    background-color: rgba(0, 0, 0, 0.05);
}

/* Navigation Theme Classes - Dark theme for blue backgrounds */
.navbar.navbar-dark {
    background: rgba(33, 150, 243, 0.9) !important;
    box-shadow: 0 2px 10px rgba(33, 150, 243, 0.3);
}

.navbar.navbar-dark .nav-logo {
    color: #ffffff !important;
}

.navbar.navbar-dark .nav-links a {
    color: #ffffff !important;
}

.navbar.navbar-dark .nav-links a:hover {
    color: #f0f0f0 !important;
    background-color: rgba(255, 255, 255, 0.1);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
    color: white;
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-title .highlight {
    color: #FFC107;
}

.hero-title .subtitle {
    display: block;
    font-size: 1.8rem;
    font-weight: 400;
    margin-top: 0.5rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #4CAF50;
    color: white;
}

.btn-primary:hover {
    background: #45a049;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #2196F3;
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: #FFC107;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Phone Mockup */
.hero-phone {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 300px;
    height: 650px;
    background: #1a1a1a;
    border-radius: 30px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

/* App Interface Styles */
.app-header {
    background: #2196F3;
    color: white;
    padding: 10px 15px;
}

.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.status-icons {
    display: flex;
    gap: 5px;
}

.app-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-title {
    font-size: 1.2rem;
    font-weight: 600;
}

.app-content {
    padding: 15px;
    background: white;
    height: calc(100% - 80px);
    overflow-y: auto;
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
}

.setting-item {
    padding: 8px 0;
    border-bottom: 1px solid #eee;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox {
    width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.checkbox.checked {
    color: #4CAF50;
}

.checkbox.unchecked {
    color: #ccc;
}

.setting-label {
    color: #333;
    flex: 1;
}

.featured-setting {
    background: #e8f5e8;
    border-radius: 4px;
    padding: 10px 8px;
    border: 1px solid #4CAF50;
}

.manage-section {
    margin-top: 20px;
}

.manage-btn {
    display: block;
    width: 100%;
    padding: 12px;
    margin-bottom: 8px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.manage-btn.blue {
    background: #2196F3;
    color: white;
}

.manage-btn.orange {
    background: #FF9800;
    color: white;
}

.manage-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* Features Section */
.features {
    padding: 80px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.feature-card.featured {
    border: 3px solid #4CAF50;
    background: linear-gradient(135deg, #f8fff8 0%, #e8f5e8 100%);
}

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

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

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

/* Privacy Section */
.privacy {
    padding: 80px 0;
    background: #f8f9fa;
}

.privacy-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.privacy-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #333;
}

.privacy-list {
    list-style: none;
    margin: 2rem 0;
}

.privacy-list li {
    padding: 0.5rem 0;
    font-size: 1.1rem;
    color: #555;
}

.btn-outline {
    background: transparent;
    color: #2196F3;
    border: 2px solid #2196F3;
}

.btn-outline:hover {
    background: #2196F3;
    color: white;
}

.privacy-visual {
    text-align: center;
}

.shield-graphic {
    position: relative;
}

.shield {
    font-size: 5rem;
    margin-bottom: 1rem;
}

.privacy-badges {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.badge {
    background: #2196F3;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Download Section */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
    color: white;
    text-align: center;
}

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.download-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.download-buttons {
    margin-bottom: 2rem;
}

.coming-soon-btn {
    display: inline-block;
    background: #666;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    border: 1px solid #555;
    cursor: default;
}

.play-btn-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.2;
}

.play-btn-text-small {
    font-size: 0.8rem;
    opacity: 0.8;
    margin-bottom: 2px;
}

.play-btn-text-large {
    font-size: 1.2rem;
    font-weight: 600;
}

.download-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
}

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

.info-label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.info-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: #FFC107;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 40px 0 20px;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #FFC107;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #FFC107;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    color: #ccc;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .privacy-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .download-info {
        flex-direction: column;
        gap: 1rem;
    }
    
    /* Mobile navigation theme adjustments */
    .navbar.navbar-light {
        background: rgba(255, 255, 255, 0.98) !important;
    }
    
    .navbar.navbar-dark {
        background: rgba(33, 150, 243, 0.95) !important;
    }
}