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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fafafa;
}

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

/* Header and Navigation */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(10px);
}

/* Mobile Navigation */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::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 0 100 100"><defs><pattern id="kaomoji" patternUnits="userSpaceOnUse" width="100" height="100"><text x="50" y="50" text-anchor="middle" font-size="20" fill="rgba(255,255,255,0.1)">(◕‿◕)</text></pattern></defs><rect width="100" height="100" fill="url(%23kaomoji)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.3s both;
}

.kaomoji-showcase {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
    animation: fadeInUp 1s ease 0.6s both;
}

.kaomoji-item {
    font-size: 2rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.kaomoji-item:hover {
    transform: translateY(-5px) scale(1.1);
    background: rgba(255, 255, 255, 0.2);
}

/* Page Hero */
.page-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Content Sections */
.content-section {
    padding: 4rem 0;
}

.main-content {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    line-height: 1.8;
}

.main-content h2 {
    color: #667eea;
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.main-content p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

.external-link {
    color: #667eea;
    font-weight: 600;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.external-link:hover {
    border-bottom-color: #667eea;
}

/* Featured Kaomojis */
.featured-kaomojis {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 4rem 0;
}

.featured-kaomojis h3 {
    text-align: center;
    font-size: 2rem;
    color: #667eea;
    margin-bottom: 3rem;
}

.kaomoji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

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

.kaomoji-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.kaomoji-card .kaomoji {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 1rem;
    color: #667eea;
}

.kaomoji-card p {
    color: #666;
    font-weight: 500;
}

/* About Page Styles */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-text h2,
.about-text h3 {
    color: #667eea;
    margin-bottom: 1.5rem;
}

.about-text h2 {
    font-size: 2rem;
}

.about-text h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
}

.mission-list {
    list-style: none;
    padding-left: 0;
}

.mission-list li {
    padding: 1rem;
    margin: 1rem 0;
    background: #f8f9ff;
    border-left: 4px solid #667eea;
    border-radius: 5px;
}

.about-sidebar {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    height: fit-content;
    position: sticky;
    top: 120px;
}

.kaomoji-showcase-vertical {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.kaomoji-item-vertical {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8f9ff;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.kaomoji-item-vertical:hover {
    transform: translateX(10px);
    background: #e8ebff;
}

.kaomoji-large {
    font-size: 2rem;
    color: #667eea;
}

.kaomoji-desc {
    font-weight: 500;
    color: #666;
}

/* Contact Page Styles */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info,
.contact-form-section {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.contact-methods {
    margin-top: 2rem;
}

.contact-method {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: #f8f9ff;
    border-radius: 15px;
    border-left: 4px solid #667eea;
}

.contact-method h3 {
    color: #667eea;
    margin-bottom: 1rem;
}

.inquiry-types {
    list-style-type: none;
    padding-left: 0;
}

.inquiry-types li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}

.inquiry-types li:last-child {
    border-bottom: none;
}

/* Form Styles */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #333;
}

.required {
    color: #e74c3c;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 1rem;
    border: 2px solid #e1e8ed;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.submit-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.form-message {
    padding: 1rem;
    border-radius: 10px;
    margin-top: 1rem;
    display: none;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

/* FAQ Section */
.faq-section {
    margin-top: 4rem;
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.faq-section h3 {
    color: #667eea;
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

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

.faq-item {
    padding: 1.5rem;
    background: #f8f9ff;
    border-radius: 15px;
    border-left: 4px solid #667eea;
}

.faq-item h4 {
    color: #667eea;
    margin-bottom: 1rem;
}

/* Privacy Policy Styles */
.privacy-content {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    max-width: 900px;
    margin: 0 auto;
}

.privacy-intro {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid #f0f0f0;
}

.last-updated {
    font-weight: 600;
    color: #667eea;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.privacy-section {
    margin-bottom: 3rem;
}

.privacy-section h2 {
    color: #667eea;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #f0f0f0;
}

.privacy-section ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

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

.contact-info-box {
    background: #f8f9ff;
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid #667eea;
    margin: 1rem 0;
}

.privacy-footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid #f0f0f0;
}

.effective-date,
.site-info {
    font-weight: 600;
    color: #667eea;
}

/* Email Links */
.email-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.email-link:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-title {
        font-size: 2rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .kaomoji-showcase {
        gap: 1rem;
    }

    .kaomoji-item {
        font-size: 1.5rem;
        padding: 0.5rem;
    }

    .main-content,
    .contact-info,
    .contact-form-section,
    .about-text,
    .about-sidebar,
    .privacy-content {
        padding: 2rem;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-sidebar {
        position: static;
    }

    .kaomoji-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }

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

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .page-title {
        font-size: 1.5rem;
    }

    .main-content,
    .contact-info,
    .contact-form-section,
    .about-text,
    .privacy-content {
        padding: 1.5rem;
    }

    .kaomoji-card {
        padding: 1.5rem;
    }

    .kaomoji-card .kaomoji {
        font-size: 2rem;
    }
}

/* Smooth scrolling for all browsers */
@supports (scroll-behavior: smooth) {
    html {
        scroll-behavior: smooth;
    }
}

/* Loading animation for better UX */
.loading {
    opacity: 0;
    animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}