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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.app-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
    letter-spacing: -0.02em;
}

/* Navigation Styles */
.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 12px 24px;
    text-decoration: none;
    color: #6b7280;
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
}

.nav-link.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.logo-container a {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
}

/* Main Content Styles */
.main {
    padding: 0;
    min-height: calc(100vh - 140px);
}

.content-section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
    padding: 2rem 0;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    text-align: center;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.last-updated {
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

/* Hero Section */
.hero {
    padding: 2rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content {
    max-width: 500px;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 28px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: white;
    color: #667eea;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.1rem;
}

/* Hero App Image */
.hero-app-image {
    max-width: 400px;
    height: auto;
    border-radius: 20px;
    transition: transform 0.3s ease;
}

.hero-app-image:hover {
    transform: scale(1.02);
}

/* Features Section */
.features {
    padding: 4rem 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #1f2937;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

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

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

.feature-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    padding: 4rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

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

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step-content p {
    opacity: 0.9;
    line-height: 1.6;
}

/* CTA Section */
.cta {
    padding: 4rem 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    text-align: center;
}

.cta-content h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1f2937;
}

.cta-content p {
    font-size: 1.25rem;
    color: #6b7280;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.cta-note {
    font-size: 0.9rem;
    color: #9ca3af;
    margin-top: 0.5rem;
}

/* Content Cards */
.content-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.content-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.content-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
    border-bottom: 2px solid #667eea;
    padding-bottom: 0.5rem;
}

.content-card p {
    margin-bottom: 1rem;
    color: #4b5563;
    line-height: 1.7;
}

.content-card ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.content-card li {
    margin-bottom: 0.5rem;
    color: #4b5563;
    line-height: 1.6;
}

.content-card strong {
    color: #1f2937;
    font-weight: 600;
}

/* Footer Styles */
.footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding: 1.5rem 0;
    text-align: center;
    color: #6b7280;
}

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

.footer p:last-child {
    margin-bottom: 0;
    font-size: 0.9rem;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem 20px;
    }
    
    .nav {
        width: 100%;
        justify-content: center;
    }
    
    .nav-link {
        flex: 1;
        text-align: center;
        padding: 14px 20px;
    }
    
    .content-section h2 {
        font-size: 2rem;
    }
    
    .content-card {
        padding: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-app-image {
        max-width: 250px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .logo {
        width: 40px;
        height: 40px;
    }
    
    .app-name {
        font-size: 1.25rem;
    }
    
    .content-section h2 {
        font-size: 1.75rem;
    }
    
    .content-card {
        padding: 1.25rem;
    }
    
    .content-card h3 {
        font-size: 1.1rem;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
.nav-link:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Loading animation */
.content-section {
    opacity: 0;
    animation: fadeIn 0.5s ease-in-out forwards;
}

.content-section.active {
    opacity: 1;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}