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

img {
    border: 0;
    max-width: 100%;
    height: auto;
}

*:focus {
    outline: 2px solid #4A90E2;
    outline-offset: 2px;
}

html {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    background: #ffffff;
    min-height: 100vh;
}

body {
    font-size: 1rem;
    color: #333;
    background: transparent;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Modern Container */
#wrapper {
    max-width: 1200px;
    margin: 0 auto;
    background: #ffffff;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Modern Header */
#header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem 2rem 1.5rem;
    color: white;
    position: relative;
    overflow: hidden;
}

#header::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="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

#header h1,
#header p {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

#header h1 a,
#header p a {
    text-decoration: none;
    color: white;
    transition: opacity 0.3s ease;
}

#header h1 a:hover,
#header p a:hover {
    opacity: 0.8;
}

/* Modern Content Area */
#content {
    padding: 2rem;
    flex: 1;
    background: #ffffff;
}

#content p {
    margin: 1.5rem 0;
    line-height: 1.8;
    color: #555;
}

#content p strong.description {
    font-size: 1.1em;
    color: #333;
}

#content ul {
    margin: 1.5rem 0;
    padding-left: 0;
    list-style: none;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

/* Double column layout for larger screens */
@media (min-width: 768px) {
    #content ul {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem 1.5rem;
    }
}

/* Tablet layout - single column for better readability */
@media (min-width: 481px) and (max-width: 1023px) {
    #content ul {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
}

#content ul li {
    margin: 0;
    padding: 0.75rem 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
}

#content ul li:hover {
    background: #e9ecef;
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

#content a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

#content a.uc {
    color: #6c757d;
}

#content a.uc:visited {
    color: #6c757d;
}

#content a:hover {
    color: #4A90E2;
    text-decoration: underline;
}

#content a:visited {
    color: #8B5CF6;
}

#content p em {
    color: #6c757d;
    font-style: italic;
}

#content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 1.5rem 0;
    color: #2c3e50;
    border-bottom: 3px solid #667eea;
    padding-bottom: 0.5rem;
}

#content h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 2rem 0 1rem 0;
    color: #495057;
    position: relative;
    padding-left: 1rem;
}

#content h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 1.5rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 2px;
}

#content p.note,
aside.note {
    font-size: 0.9rem;
    color: #6c757d;
    padding: 1rem 1.5rem;
    background: #f8f9fa;
    border-left: 4px solid #17a2b8;
    border-radius: 0 8px 8px 0;
    margin: 1.5rem 0;
}

aside.note p {
    margin: 0.5rem 0;
}

aside.note p:first-child {
    margin-top: 0;
}

aside.note p:last-child {
    margin-bottom: 0;
}

#content p img {
    margin: 1rem 0;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.quot {
    display: block;
    text-align: right;
    font-style: italic;
    color: #6c757d;
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* Modern Footer */
footer {
    margin-top: auto;
}

#footer-menu {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding: 1.5rem 2rem;
    margin: 0;
    gap: 2rem;
    font-size: 0.95rem;
    border-top: 1px solid #e9ecef;
}

#footer-menu ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

#footer-menu li {
    color: #ffffff;
    margin: 0;
}

#footer-menu a {
    color: #ffffff;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

#footer-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

/* Modern Tags and Search */
#tags {
    float: right;
    width: 30%;
    margin: 2rem 1rem 1rem 1rem;
    padding: 1.5rem;
    border: 1px solid #e9ecef;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

#tags a {
    color: #667eea;
    text-decoration: none;
    padding: 0.25rem 0.5rem;
    background: #f8f9fa;
    border-radius: 4px;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

#tags a:hover {
    background: #667eea;
    color: white;
}

#tags ul li {
    display: inline;
    margin: 0.25rem;
}

.hit {
    margin: 1rem 0;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #28a745;
}

#query {
    width: 100%;
    max-width: 500px;
    padding: 0.75rem 1rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

#query:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Code Snippet Component */
.code-snippet {
    margin: 2rem 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background: #ffffff;
}

.code-snippet-header {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    border-bottom: 1px solid #e9ecef;
}

.code-snippet-tab {
    background: transparent;
    border: none;
    color: #ffffff;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    position: relative;
}

.code-snippet-tab:hover {
    background: rgba(255, 255, 255, 0.1);
}

.code-snippet-tab.active {
    background: rgba(255, 255, 255, 0.15);
    border-bottom-color: #667eea;
}

.code-snippet-content {
    position: relative;
    min-height: 200px;
}

.code-snippet-panel {
    display: none;
    padding: 0;
    margin: 0;
}

.code-snippet-panel.active {
    display: block;
}

.code-snippet-panel pre {
    margin: 0;
    padding: 1.5rem;
    background: #f8f9fa;
    border: none;
    border-radius: 0;
    overflow-x: auto;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    color: #2c3e50;
}

.code-snippet-panel code {
    background: transparent;
    padding: 0;
    border-radius: 0;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

/* Language-specific syntax highlighting */
.code-snippet-panel .javascript {
    color: #2c3e50;
}

.code-snippet-panel .cpp {
    color: #2c3e50;
}

.code-snippet-panel .go {
    color: #2c3e50;
}

.code-snippet-panel .python {
    color: #2c3e50;
}

.code-snippet-panel .php {
    color: #2c3e50;
}

/* Copy button */
.code-snippet-copy {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: #667eea;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(-10px);
}

.code-snippet:hover .code-snippet-copy {
    opacity: 1;
    transform: translateY(0);
}

.code-snippet-copy:hover {
    background: #4A90E2;
    transform: translateY(-2px);
}

.code-snippet-copy.copied {
    background: #28a745;
}

/* Responsive code snippets */
@media (max-width: 768px) {
    .code-snippet-header {
        flex-direction: column;
    }
    
    .code-snippet-tab {
        padding: 1rem;
        text-align: left;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .code-snippet-panel pre {
        padding: 1rem;
        font-size: 0.8rem;
    }
    
    .code-snippet-copy {
        position: static;
        margin: 1rem;
        opacity: 1;
        transform: none;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    #wrapper {
        margin: 0;
        border-radius: 0;
        min-height: 100vh;
    }
    
    #header {
        padding: 1.5rem 1rem;
    }
    
    #header h1,
    #header p {
        font-size: 2rem;
    }
    
    #content {
        padding: 1.5rem 1rem;
    }
    
    #content h1 {
        font-size: 2rem;
    }
    
    #content h2 {
        font-size: 1.5rem;
    }
    
    #content ul {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    #content ul li {
        padding: 1rem;
    }
    
    #footer-menu {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    #footer-menu ul {
        flex-direction: column;
        gap: 1rem;
    }
    
    #tags {
        float: none;
        width: 100%;
        margin: 1rem 0;
    }
}

@media (max-width: 480px) {
    #header h1,
    #header p {
        font-size: 1.75rem;
    }
    
    #content h1 {
        font-size: 1.75rem;
    }
    
    #content h2 {
        font-size: 1.25rem;
    }
}