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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

/* Header and Navigation */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.brand-title {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease-in-out infinite;
}

.kaomoji-accent {
    font-size: 1.2rem;
    color: #ff6b6b;
    animation: bounce 2s infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

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

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

.nav-link:hover,
.nav-link.active {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    color: white;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.gradient-text {
    background: linear-gradient(45deg, #ffd700, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.inline-kaomoji {
    font-size: 1.5rem;
    color: #ffd700;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.hero-kaomojis {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.floating-kaomoji {
    position: absolute;
    font-size: 2rem;
    color: rgba(255, 255, 255, 0.3);
    animation: float 6s ease-in-out infinite;
}

.kaomoji-1 { top: 20%; left: 10%; animation-delay: 0s; }
.kaomoji-2 { top: 30%; right: 15%; animation-delay: 1s; }
.kaomoji-3 { top: 60%; left: 20%; animation-delay: 2s; }
.kaomoji-4 { top: 70%; right: 25%; animation-delay: 3s; }
.kaomoji-5 { top: 40%; left: 50%; animation-delay: 4s; }

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(5deg); }
    66% { transform: translateY(10px) rotate(-3deg); }
}

/* Main Content */
.main-content {
    background: white;
    margin-top: -50px;
    border-radius: 50px 50px 0 0;
    position: relative;
    z-index: 3;
    padding: 80px 0;
}

/* Blog Article */
.blog-article {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.article-header {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
    color: white;
    padding: 3rem 2rem;
    text-align: center;
}

.article-title {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    font-size: 1rem;
    opacity: 0.9;
}

.article-date,
.article-category {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.article-content {
    padding: 3rem 2rem;
    line-height: 1.8;
}

.article-content h2 {
    font-size: 1.8rem;
    color: #333;
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid;
    border-image: linear-gradient(45deg, #ff6b6b, #4ecdc4) 1;
}

.article-content h3 {
    font-size: 1.4rem;
    color: #555;
    margin: 2rem 0 1rem;
    position: relative;
}

.article-content h3::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    border-radius: 2px;
}

.article-content p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.inline-link {
    color: #ff6b6b;
    text-decoration: none;
    font-weight: bold;
    position: relative;
    transition: all 0.3s ease;
}

.inline-link:hover {
    color: #4ecdc4;
}

.inline-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    transition: width 0.3s ease;
}

.inline-link:hover::after {
    width: 100%;
}

/* Kaomoji Showcase */
.kaomoji-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.kaomoji-item {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.kaomoji {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.5rem;
    font-family: monospace;
}

.description {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Tips Section */
.tips-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.tip-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem;
    border-radius: 15px;
    color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.tip-card h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #ffd700;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 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: #4ecdc4;
}

.footer-kaomoji {
    color: #ffd700;
    animation: bounce 2s infinite;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
}

.footer-kaomojis {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.footer-kaomojis span {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem;
    border-radius: 10px;
    font-family: monospace;
    transition: all 0.3s ease;
}

.footer-kaomojis span:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        backdrop-filter: blur(10px);
        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: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

    .article-header {
        padding: 2rem 1rem;
    }

    .article-content {
        padding: 2rem 1rem;
    }

    .kaomoji-showcase {
        grid-template-columns: 1fr;
    }

    .tips-section {
        grid-template-columns: 1fr;
    }

    .floating-kaomoji {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .brand-title {
        font-size: 1.4rem;
    }

    .article-content h2 {
        font-size: 1.5rem;
    }

    .article-content h3 {
        font-size: 1.2rem;
    }

    .kaomoji-item {
        padding: 1rem;
    }

    .tip-card {
        padding: 1.5rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    .header,
    .hero,
    .footer {
        display: none;
    }

    .main-content {
        margin-top: 0;
        border-radius: 0;
    }

    .blog-article {
        box-shadow: none;
        border-radius: 0;
    }
}