* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #fff;
    color: #333;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

body.dark-mode {
    background-color: #000;
    color: #fff;
}

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

/* Header */
.site-header {
    background-color: #000;
    padding: 10px 0 0 0;
}

body.dark-mode .site-header {
    background-color: #000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    padding: 0 20px 10px 20px;
}

.site-title {
    font-size: 2rem;
    font-weight: bold;
    text-decoration: none;
    color: #fff;
}

body.dark-mode .site-title {
    color: #fff;
}

.site-subtitle {
    font-size: 0.9rem;
    color: #ccc;
    margin-top: 5px;
}

body.dark-mode .site-subtitle {
    color: #ccc;
}

/* Banner */
.site-banner {
    background-color: #000;
    padding: 0;
    text-align: center;
    border-top: 3px solid #000;
    border-bottom: 3px solid #000;
    position: relative;
}

body.dark-mode .site-banner {
    background-color: #000;
    border-color: #000;
}

.banner-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.banner-title {
    position: absolute;
    bottom: 20px;
    left: 40px;
    color: #ffff00;
    font-size: 2.5rem;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
    z-index: 10;
}

/* Theme Toggle */
.theme-toggle {
    background: #333;
    border: none;
    color: #fff;
    padding: 8px 16px;
    cursor: pointer;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.theme-toggle:hover {
    background-color: #555;
}

body.dark-mode .theme-toggle {
    background: #fff;
    color: #000;
}

body.dark-mode .theme-toggle:hover {
    background-color: #ddd;
}

/* Navigation */
.main-nav {
    background-color: #000;
    border-top: 1px solid #333;
    padding: 0;
}

body.dark-mode .main-nav {
    background-color: #000;
    border-top-color: #333;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    justify-content: center;
    margin: 0;
    padding: 0;
}

.nav-list > li {
    margin: 0;
    padding: 0;
}

.nav-list > li > a {
    display: block;
    color: #ffff00;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: bold;
    text-transform: uppercase;
    padding: 12px 20px;
    transition: all 0.2s;
    border: 2px solid #000;
    margin: 2px;
}

.nav-list > li > a:hover {
    color: #ffff00;
    background-color: transparent;
    border: 2px solid #fff;
}

body.dark-mode .nav-list a {
    color: #ffff00;
}

body.dark-mode .nav-list > li > a:hover {
    color: #ffff00;
    background-color: transparent;
    border: 2px solid #fff;
}

/* Course Submenu */
.nav-list li {
    position: relative;
}

.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #000;
    border: 2px solid #333;
    padding: 0;
    min-width: 220px;
    z-index: 1000;
}

body.dark-mode .submenu {
    background-color: #000;
    border-color: #333;
}

.nav-list li:hover .submenu {
    display: block;
}

.submenu li {
    margin: 0;
    padding: 0;
}

.submenu a {
    display: block;
    padding: 10px 20px;
    color: #ffff00;
    border: 2px solid #000;
    margin: 2px;
    transition: all 0.2s;
}

body.dark-mode .submenu a {
    color: #ffff00;
}

.submenu a:hover {
    background-color: transparent;
    border: 2px solid #fff;
    color: #ffff00;
}

body.dark-mode .submenu a:hover {
    background-color: transparent;
    border: 2px solid #fff;
    color: #ffff00;
}

/* Main Content */
main {
    padding: 40px 0;
    min-height: calc(100vh - 300px);
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: 30px;
    color: #333;
    font-weight: normal;
}

body.dark-mode .page-title {
    color: #fff;
}

.content {
    font-size: 1rem;
    line-height: 1.8;
}

.content p {
    margin-bottom: 20px;
}

.content em {
    font-style: italic;
}

.content strong {
    font-weight: bold;
}

.content a {
    color: #0066cc;
    text-decoration: underline;
}

.content a:hover {
    color: #0052a3;
}

body.dark-mode .content a {
    color: #66aaff;
}

body.dark-mode .content a:hover {
    color: #99ccff;
}

.content blockquote {
    border-left: 4px solid #0066cc;
    padding-left: 20px;
    margin: 20px 0;
    font-style: italic;
    color: #666;
}

body.dark-mode .content blockquote {
    border-left-color: #66aaff;
    color: #ccc;
}

.content ul, .content ol {
    margin-left: 40px;
    margin-bottom: 20px;
}

.content li {
    margin-bottom: 10px;
}

.content img {
    max-width: 100%;
    height: auto;
    margin: 20px 0;
}

/* Posts Grid */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.post-card {
    border: 1px solid #ddd;
    padding: 20px;
    transition: all 0.3s;
    background-color: #fff;
}

body.dark-mode .post-card {
    border-color: #333;
    background-color: #1a1a1a;
}

.post-card:hover {
    border-color: #0066cc;
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

body.dark-mode .post-card:hover {
    border-color: #66aaff;
}

.post-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    font-weight: normal;
}

.post-card a {
    color: #333;
    text-decoration: none;
}

body.dark-mode .post-card a {
    color: #fff;
}

.post-card a:hover {
    color: #0066cc;
}

body.dark-mode .post-card a:hover {
    color: #66aaff;
}

.post-excerpt {
    margin-top: 10px;
    font-size: 0.9rem;
    color: #666;
}

body.dark-mode .post-excerpt {
    color: #ccc;
}

/* Footer */
footer {
    border-top: 1px solid #ddd;
    padding: 30px 0;
    text-align: center;
    margin-top: 60px;
    background-color: #f5f5f5;
}

body.dark-mode footer {
    border-top-color: #333;
    background-color: #1a1a1a;
}

/* Responsive */
@media (max-width: 768px) {
    .site-title {
        font-size: 1.5rem;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 15px;
    }
    
    .submenu {
        position: static;
        display: block;
        border: none;
        padding-left: 20px;
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
    }
}


/* Remix Cards Grid */
.remixes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.remix-card {
    border: 1px solid #ddd;
    padding: 25px;
    background-color: #fff;
    transition: all 0.3s;
}

.remix-card:hover {
    border-color: #854899;
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

body.dark-mode .remix-card {
    border-color: #333;
    background-color: #1a1a1a;
}

body.dark-mode .remix-card:hover {
    border-color: #a36bb3;
}

.remix-artist {
    font-size: 1.3rem;
    font-weight: bold;
    color: #854899;
    margin-bottom: 10px;
}

body.dark-mode .remix-artist {
    color: #a36bb3;
}

.remix-title {
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.remix-embed {
    margin: 20px 0;
}

.remix-embed iframe {
    max-width: 100%;
}

.issuu-note {
    background-color: #fff3cd;
    border: 1px solid #ffc107;
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
}

body.dark-mode .issuu-note {
    background-color: #3d3511;
    border-color: #ffc107;
}

.issuu-note strong {
    color: #856404;
}

body.dark-mode .issuu-note strong {
    color: #ffc107;
}