/* Retro Japanese Design System */

:root {
    /* Colors */
    --cream: #F5F5DC;
    --muted-red: #C73E1D;
    --black: #1A1A1A;
    --retro-yellow: #FFD700;
    --dark-gray: #2D2D2D;
    --light-gray: #E0E0E0;
    --accent-blue: #4A90E2;
    
    /* Typography */
    --font-pixel: 'Press Start 2P', monospace;
    --font-japanese: 'DotGothic16', sans-serif;
    --font-body: 'DotGothic16', sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Borders */
    --border-pixel: 2px solid var(--black);
    --border-radius: 4px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--cream);
    color: var(--black);
    line-height: 1.6;
    position: relative;
    min-height: 100vh;
}

/* CRT Effect */
.crt-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    background: linear-gradient(
        transparent 50%,
        rgba(0, 0, 0, 0.03) 50%
    );
    background-size: 100% 4px;
    animation: scanlines 0.1s linear infinite;
}

@keyframes scanlines {
    0% { transform: translateY(0); }
    100% { transform: translateY(4px); }
}

/* Typography */
.pixel-text {
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    line-height: 1.4;
}

.japanese-text {
    font-family: var(--font-japanese);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-pixel);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

/* Layout */
.header {
    background: var(--black);
    color: var(--cream);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: var(--border-pixel);
}

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

.nav-logo {
    text-decoration: none;
    color: var(--retro-yellow);
    font-size: 1.2rem;
}

.nav-menu {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--cream);
    text-decoration: none;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid transparent;
    transition: all 0.2s ease;
    position: relative;
}

.nav-link:hover {
    border: var(--border-pixel);
    background: var(--muted-red);
    transform: translateY(-2px);
}

/* Main Content */
.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-md);
    min-height: calc(100vh - 200px);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* Cards */
.card {
    background: var(--cream);
    border: var(--border-pixel);
    padding: var(--space-lg);
    position: relative;
    transition: all 0.3s ease;
    box-shadow: 4px 4px 0 var(--black);
}

.retro-card {
    background: var(--cream);
    border: var(--border-pixel);
    padding: 0;
    position: relative;
    transition: all 0.3s ease;
    box-shadow: 4px 4px 0 var(--black);
    overflow: hidden;
}

.retro-card:hover {
    transform: translateY(-4px);
    box-shadow: 8px 8px 0 var(--black);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 8px 8px 0 var(--black);
}

.card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--muted-red), var(--retro-yellow), var(--accent-blue));
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover::before {
    opacity: 1;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    background: var(--black);
    color: var(--cream);
    text-decoration: none;
    border: var(--border-pixel);
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    background: var(--muted-red);
    transform: translateY(-2px);
    box-shadow: 4px 4px 0 var(--black);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

/* Forms */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-family: var(--font-pixel);
    font-size: 0.8rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-sm);
    border: var(--border-pixel);
    background: var(--cream);
    font-family: var(--font-body);
    font-size: 1rem;
}

.form-textarea {
    min-height: 200px;
    resize: vertical;
}

/* Japanese Patterns */
.seigaiha {
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23C73E1D' fill-opacity='0.1'%3E%3Ccircle cx='30' cy='30' r='4'/%3E%3Ccircle cx='10' cy='10' r='2'/%3E%3Ccircle cx='50' cy='10' r='2'/%3E%3Ccircle cx='10' cy='50' r='2'/%3E%3Ccircle cx='50' cy='50' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.asanoha {
    background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23FFD700' fill-opacity='0.1'%3E%3Cpath d='M20 20l-10-10h20l-10 10zm0 0l10 10H10l10-10z'/%3E%3C/g%3E%3C/svg%3E");
}

/* Footer */
.footer {
    background: var(--black);
    color: var(--cream);
    padding: var(--space-lg) 0;
    margin-top: auto;
    border-top: var(--border-pixel);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-link {
    color: var(--cream);
    text-decoration: none;
    font-size: 0.8rem;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--retro-yellow);
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--light-gray);
    border-radius: 50%;
    border-top-color: var(--muted-red);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Page-specific styles */
.hero {
    text-align: center;
    padding: var(--space-2xl) 0;
    position: relative;
    background: linear-gradient(135deg, var(--cream) 0%, #F0F0E0 100%);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: var(--space-lg);
    color: var(--muted-red);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: var(--space-xl);
    color: var(--dark-gray);
}

/* Terminal Window */
.terminal-window {
    background: var(--black);
    border: var(--border-pixel);
    border-radius: var(--border-radius);
    margin: 0 auto var(--space-xl);
    max-width: 600px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.terminal-header {
    background: var(--dark-gray);
    padding: var(--space-sm) var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--light-gray);
}

.terminal-buttons {
    display: flex;
    gap: var(--space-xs);
}

.terminal-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.terminal-btn.close { background: #ff5f57; }
.terminal-btn.minimize { background: #ffbd2e; }
.terminal-btn.maximize { background: #28ca42; }

.terminal-title {
    color: var(--cream);
    font-family: var(--font-pixel);
    font-size: 0.8rem;
}

.terminal-body {
    padding: var(--space-md);
    background: var(--black);
    color: var(--cream);
    font-family: var(--font-pixel);
    font-size: 0.7rem;
    line-height: 1.2;
}

.ascii-art {
    margin-bottom: var(--space-md);
    text-align: center;
}

.ascii-text {
    color: var(--retro-yellow);
    margin: 0;
    font-size: 0.6rem;
    line-height: 1;
}

.terminal-prompt {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.prompt-text {
    color: var(--retro-yellow);
}

.typing-text {
    color: var(--cream);
}

.cursor {
    animation: blink 1s infinite;
    color: var(--retro-yellow);
}

/* Status Bar */
.status-bar {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin: var(--space-lg) 0;
    flex-wrap: wrap;
}

.status-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--black);
    color: var(--cream);
    padding: var(--space-xs) var(--space-sm);
    border: var(--border-pixel);
    border-radius: var(--border-radius);
    font-family: var(--font-pixel);
    font-size: 0.8rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.online {
    background: #28ca42;
    animation: pulse 2s infinite;
}

.status-icon {
    font-size: 1rem;
}

/* Enhanced Buttons */
.retro-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--black);
    color: var(--cream);
    text-decoration: none;
    border: var(--border-pixel);
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.retro-btn:hover {
    background: var(--muted-red);
    transform: translateY(-2px);
    box-shadow: 4px 4px 0 var(--black);
}

.retro-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.retro-btn:hover::before {
    left: 100%;
}

.btn-icon {
    font-size: 1rem;
}

/* Easter Egg Hint */
.easter-egg-hint {
    margin-top: var(--space-lg);
    opacity: 0.7;
    animation: fadeInOut 3s ease-in-out infinite;
}

.hint-text {
    font-family: var(--font-pixel);
    font-size: 0.7rem;
    color: var(--dark-gray);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-xl);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-xl);
    color: var(--muted-red);
}

.featured {
    padding: var(--space-2xl) 0;
}

.about-preview {
    padding: var(--space-2xl) 0;
    background: var(--light-gray);
    position: relative;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    text-align: center;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--space-xl);
}

.blog-header, .courses-header, .about-header {
    text-align: center;
    padding: var(--space-xl) 0;
    background: var(--light-gray);
}

.page-title {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    color: var(--muted-red);
}

.page-subtitle {
    font-size: 1.1rem;
    color: var(--dark-gray);
}

.blog-filters {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.filter-btn.active {
    background: var(--muted-red);
    color: var(--cream);
}

.blog-grid, .courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.card-thumbnail {
    position: relative;
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.card-thumbnail {
    position: relative;
    overflow: hidden;
    margin-bottom: 0;
}

.card-thumbnail img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.card-thumbnail.no-image {
    height: 200px;
    background: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.placeholder-icon {
    font-size: 3rem;
    opacity: 0.5;
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    padding: var(--space-sm);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.retro-card:hover .card-overlay {
    opacity: 1;
}

.card-badges {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    align-items: flex-end;
}

.retro-badge {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-family: var(--font-pixel);
    font-size: 0.7rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 2px solid;
    box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
}

.video-badge {
    background: var(--muted-red);
    color: var(--cream);
    border-color: var(--black);
}

.text-badge {
    background: var(--retro-yellow);
    color: var(--black);
    border-color: var(--black);
}

.tag-badge {
    background: var(--accent-blue);
    color: var(--cream);
    border-color: var(--black);
}

.card-content {
    padding: var(--space-lg);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.meta-left {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.meta-right {
    display: flex;
    align-items: center;
}

.read-time {
    font-size: 0.8rem;
    color: var(--dark-gray);
    font-family: var(--font-pixel);
}

.card-status {
    background: var(--retro-yellow);
    color: var(--black);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-family: var(--font-pixel);
    font-size: 0.7rem;
    font-weight: bold;
    border: 2px solid var(--black);
    box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
}

.video-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: var(--space-md);
    border-radius: 50%;
    font-size: 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.play-icon {
    display: block;
}

.card-title {
    margin-bottom: var(--space-sm);
}

.card-link {
    color: var(--black);
    text-decoration: none;
    transition: color 0.2s ease;
}

.card-link:hover {
    color: var(--muted-red);
}

.card-excerpt {
    color: var(--dark-gray);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.card-date {
    font-size: 0.9rem;
    color: var(--dark-gray);
}

.card-badge {
    background: var(--retro-yellow);
    color: var(--black);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    font-family: var(--font-pixel);
}

.card-tags {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.tag {
    background: var(--light-gray);
    color: var(--black);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    font-family: var(--font-pixel);
}

.post, .course {
    max-width: 800px;
    margin: 0 auto;
}

.post-header, .course-header {
    text-align: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: var(--border-pixel);
}

.post-title, .course-title {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    color: var(--muted-red);
}

.post-meta, .course-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.post-date, .course-date {
    color: var(--dark-gray);
}

.post-tags, .course-tags {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.post-video {
    margin: var(--space-xl) 0;
}

.video-container {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    overflow: hidden;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: var(--border-pixel);
}

.post-content, .course-content {
    line-height: 1.8;
    font-size: 1.1rem;
}

.post-content h1, .post-content h2, .post-content h3,
.course-content h1, .course-content h2, .course-content h3 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--muted-red);
}

.post-content p, .course-content p {
    margin-bottom: var(--space-md);
}

.post-content code, .course-content code {
    background: var(--light-gray);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-family: var(--font-pixel);
    font-size: 0.9rem;
}

.post-content pre, .course-content pre {
    background: var(--black);
    color: var(--cream);
    padding: var(--space-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: var(--space-md) 0;
}

.post-content blockquote, .course-content blockquote {
    border-left: 4px solid var(--muted-red);
    padding-left: var(--space-md);
    margin: var(--space-md) 0;
    font-style: italic;
    color: var(--dark-gray);
}

.post-footer, .course-footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: var(--border-pixel);
}

.post-navigation, .course-navigation {
    text-align: center;
}

.lessons-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.lesson-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.lesson-number {
    background: var(--muted-red);
    color: var(--cream);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    flex-shrink: 0;
}

.lesson-content {
    flex: 1;
}

.lesson-title {
    margin-bottom: var(--space-sm);
    color: var(--muted-red);
}

.lesson-text {
    line-height: 1.6;
}

.about-list {
    list-style: none;
    padding: 0;
}

.about-list li {
    margin-bottom: var(--space-sm);
    padding-left: var(--space-md);
}

.literary-quote {
    background: var(--light-gray);
    border-left: 4px solid var(--muted-red);
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    font-style: italic;
    position: relative;
}

.literary-quote p {
    margin: 0 0 var(--space-sm) 0;
    font-size: 1.1rem;
    line-height: 1.6;
}

.literary-quote cite {
    display: block;
    text-align: right;
    font-size: 0.9rem;
    color: var(--dark-gray);
    font-style: normal;
    font-family: var(--font-pixel);
}

.about-visual {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

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

.about-cta {
    text-align: center;
    margin-top: var(--space-2xl);
    padding: var(--space-xl);
    background: var(--light-gray);
}

.cta-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-lg);
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .main {
        padding: var(--space-lg) var(--space-sm);
    }
    
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1rem; }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .post-title, .course-title {
        font-size: 2rem;
    }
    
    .blog-filters {
        flex-direction: column;
        align-items: center;
    }
    
    .card-meta {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .lesson-item {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
}

/* Glitch Effect */
.glitch {
    position: relative;
    color: var(--muted-red);
    animation: glitch 2s infinite;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    animation: glitch-1 0.5s infinite;
    color: var(--retro-yellow);
    z-index: -1;
}

.glitch::after {
    animation: glitch-2 0.5s infinite;
    color: var(--accent-blue);
    z-index: -2;
}

@keyframes glitch {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
}

@keyframes glitch-1 {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(2px, -2px); }
    40% { transform: translate(-2px, 2px); }
    60% { transform: translate(-2px, -2px); }
    80% { transform: translate(2px, 2px); }
}

@keyframes glitch-2 {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-2px, -2px); }
    40% { transform: translate(2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(-2px, 2px); }
}