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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Hiragino Kaku Gothic ProN', 'ヒラギノ角ゴ ProN W3', Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Navigation */
nav {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 1rem 0;
}

nav li {
    margin: 0 1rem;
}

nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
}

nav a:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Main Content */
main {
    margin: 2rem auto;
}

.section {
    background: white;
    margin: 2rem 0;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #333;
    border-bottom: 3px solid #667eea;
    padding-bottom: 0.5rem;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-card {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.15);
    border-color: #667eea;
}

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

.feature-card h3, .feature-card h4 {
    color: #333;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

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

/* Features List */
.features-list {
    display: grid;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.feature-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.feature-item h3 {
    color: #333;
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
}

.feature-item p {
    color: #555;
    line-height: 1.6;
}

/* FAQ */
.faq-list {
    margin-top: 1.5rem;
}

.faq-item {
    background: #f8f9fa;
    margin-bottom: 1rem;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #28a745;
}

.faq-item h3 {
    color: #333;
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.faq-item p {
    color: #555;
    line-height: 1.6;
}

/* Troubleshooting */
.troubleshooting h3 {
    color: #333;
    margin: 1.5rem 0 1rem 0;
    font-size: 1.2rem;
}

.troubleshooting ol, .troubleshooting ul {
    margin-left: 2rem;
    color: #555;
}

.troubleshooting li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Privacy Policy Specific */
.privacy-policy .policy-info {
    background: #e7f3ff;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    border-left: 4px solid #007bff;
}

.policy-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #eee;
}

.policy-section:last-child {
    border-bottom: none;
}

.policy-section h3 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.policy-section ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.policy-section li {
    margin-bottom: 0.8rem;
    line-height: 1.6;
    color: #555;
}

.privacy-highlight {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
    border: 2px solid #667eea;
}

.privacy-highlight h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.policy-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #667eea;
}

/* Buttons */
.btn {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    color: white;
}

.app-store-link {
    text-align: center;
    margin-top: 2rem;
}

/* Footer */
footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

footer a {
    color: #667eea;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav li {
        margin: 0.25rem 0;
    }
    
    .section {
        padding: 1.5rem;
        margin: 1rem 0;
    }
    
    .section h2 {
        font-size: 1.5rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
    
    .feature-icon {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 1.5rem 0;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .section {
        padding: 1rem;
        border-radius: 8px;
    }
    
    .feature-card {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
}

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

/* Loading animation for better UX */
.section {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Contact Methods */
.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.contact-item {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    border-left: 4px solid #667eea;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
}

.contact-item h3 {
    color: #333;
    margin-bottom: 0.8rem;
    font-size: 1.2rem;
}

.contact-item p {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.contact-link {
    display: inline-block;
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border: 2px solid #667eea;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.contact-link:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.response-info {
    background: #e7f3ff;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 2rem 0;
    border-left: 4px solid #007bff;
}

.response-info ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.response-info li {
    margin-bottom: 0.5rem;
    color: #555;
}

.contact-info {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
}

.contact-info a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

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