/* CSS Theme Variables */
:root {
    /* Light Mode (Default) */
    --bg-editor: #ffffff;
    --bg-sidebar: #f3f3f3;
    --bg-tabs: #e8e8e8;
    --bg-active-tab: #ffffff;
    --border-color: #e4e4e7;
    --text-main: #3f3f46;
    --text-bright: #18181b;
    --accent-color: #007acc;
    --status-bg: #007acc;
    --announcement-bg: linear-gradient(90deg, #007acc, #005a9e);
    --right-sidebar-bg: #ffffff;
    
    --hover-bg: rgba(0, 0, 0, 0.05);
    --active-item-bg: rgba(0, 122, 204, 0.1);
    
    --search-highlight-bg: rgba(253, 224, 71, 0.4);
    --search-highlight-border: #eab308;
    
    /* Light Mode Syntax Highlighting (GitHub style) */
    --code-bg: #f6f8fa;
    --code-text: #24292f;
    --code-comment: #6a737d;
    --code-keyword: #d73a49;
    --code-string: #032f62;
    --code-name: #24292f;
    --code-operator: #d73a49;
    --code-function: #6f42c1;
    --code-builtin: #e36209;
    --code-class: #6f42c1;
    --code-number: #005cc5;
}

.dark {
    /* Dark Mode Override */
    --bg-editor: #1e1e1e;
    --bg-sidebar: #252526;
    --bg-tabs: #2d2d2d;
    --bg-active-tab: #1e1e1e;
    --border-color: #333333;
    --text-main: #cccccc;
    --text-bright: #ffffff;
    --accent-color: #007acc;
    --status-bg: #007acc;
    --announcement-bg: linear-gradient(90deg, #1f1f1f, #2d2d2d);
    --right-sidebar-bg: #1e1e1e;
    
    --hover-bg: rgba(255, 255, 255, 0.05);
    --active-item-bg: rgba(255, 255, 255, 0.1);
    
    --search-highlight-bg: rgba(255, 235, 59, 0.3);
    --search-highlight-border: #fbc02d;
    
    /* Dark Mode Syntax Highlighting (Monokai style) */
    --code-bg: #2d2d2d;
    --code-text: #f8f8f2;
    --code-comment: #75715e;
    --code-keyword: #f92672;
    --code-string: #e6db74;
    --code-name: #f8f8f2;
    --code-operator: #f92672;
    --code-function: #a6e22e;
    --code-builtin: #66d9ef;
    --code-class: #a6e22e;
    --code-number: #ae81ff;
}

/* Base Body Styles */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-editor);
    color: var(--text-main);
    overflow: hidden;
}

.mono {
    font-family: 'JetBrains Mono', monospace;
}

/* Global Reset for links */
a {
    color: inherit;
    text-decoration: none;
}

/* Sidebar Styles */
.sidebar {
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 260px;
    color: var(--text-main);
}

.sidebar.collapsed {
    width: 0;
    opacity: 0;
    overflow: hidden;
    border-right-width: 0;
}

.sidebar-item {
    display: flex;
    align-items: center;
    padding: 6px 12px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    border-left: 2px solid transparent;
    color: var(--text-main);
    text-decoration: none;
}

.sidebar-item:hover {
    background-color: var(--hover-bg);
    color: var(--text-bright);
}

.sidebar-item.active {
    background-color: var(--active-item-bg);
    color: var(--text-bright);
    border-left-color: var(--accent-color);
}

.sidebar-item:active {
    transform: scale(0.98);
}

/* Collapsible Group Styles */
.group-content {
    transition: all 0.3s ease;
    overflow: hidden;
}

.group-content.hidden {
    display: none;
}

.chevron-icon {
    transition: transform 0.2s ease;
}

.chevron-icon.rotated {
    transform: rotate(-90deg);
}

/* Tabs Styles */
.tabs-container {
    background-color: var(--bg-tabs);
    display: flex;
    height: 35px;
    overflow-x: auto;
    scrollbar-width: none;
    border-bottom: 1px solid var(--border-color);
}

.tab {
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-size: 12px;
    background-color: var(--bg-tabs);
    border-right: 1px solid var(--border-color);
    cursor: pointer;
    min-width: 120px;
    position: relative;
    color: var(--text-main);
    transition: background-color 0.15s ease;
}

.tab.active {
    background-color: var(--bg-active-tab);
    color: var(--text-bright);
}

.tab.active::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--accent-color);
}

/* Editor & Markdown Styles */
.editor-content {
    padding: 40px;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Markdown prose overrides */
.prose h1 { 
    font-size: 2.25rem; 
    font-weight: 700; 
    color: var(--text-bright); 
    margin-bottom: 1.5rem; 
    border-bottom: 1px solid var(--border-color); 
    padding-bottom: 0.5rem; 
}

.prose h2 { 
    font-size: 1.5rem; 
    font-weight: 600; 
    color: var(--text-bright); 
    margin-top: 2rem; 
    margin-bottom: 1rem; 
}

.prose h3 { 
    font-size: 1.25rem; 
    font-weight: 600; 
    color: var(--text-bright); 
    margin-top: 1.5rem; 
    margin-bottom: 0.75rem; 
}

.prose p { 
    margin-bottom: 1.25rem; 
    line-height: 1.7; 
    color: var(--text-main);
}

.prose a {
    color: var(--accent-color);
    text-decoration: none;
    border-bottom: 1px dashed transparent;
    transition: border-bottom 0.2s;
}

.prose a:hover {
    border-bottom-color: var(--accent-color);
}

.prose ul, .prose ol { 
    margin-bottom: 1.5rem; 
    padding-left: 1.5rem; 
    list-style-type: disc; 
    color: var(--text-main);
}

.prose ol { 
    list-style-type: decimal; 
}

.prose li { 
    margin-bottom: 0.6rem; 
}

.prose li > p { 
    margin-bottom: 0.5rem; 
}

.prose hr { 
    border: 0; 
    border-top: 1px solid var(--border-color); 
    margin: 2.5rem 0; 
}

.prose code { 
    font-family: 'JetBrains Mono', monospace; 
    background-color: var(--code-bg); 
    color: var(--code-keyword); 
    padding: 0.2rem 0.4rem; 
    border-radius: 4px; 
    font-size: 0.9em; 
}

.prose pre { 
    background-color: var(--code-bg); 
    border-radius: 8px; 
    padding: 1rem; 
    margin-bottom: 1.5rem; 
    overflow-x: auto; 
    border: 1px solid var(--border-color); 
}

.prose pre code {
    padding: 0;
    background-color: transparent;
    border-radius: 0;
    color: inherit;
    font-size: inherit;
}

.prose blockquote { 
    border-left: 4px solid var(--accent-color); 
    padding-left: 1rem; 
    font-style: italic; 
    color: var(--text-main); 
    margin-bottom: 1.5rem; 
    opacity: 0.85;
}

.prose table { 
    width: 100%; 
    border-collapse: collapse; 
    margin-bottom: 2rem; 
    margin-top: 1rem; 
}

.prose th, .prose td { 
    border: 1px solid var(--border-color); 
    padding: 12px 16px; 
    text-align: left; 
}

.prose th { 
    background-color: var(--bg-tabs); 
    font-weight: 600; 
    color: var(--text-bright);
}

.prose img {
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin: 2rem 0;
}

/* Code Copy Button */
.code-container {
    position: relative;
}

.copy-button {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 6px;
    background-color: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-main);
    opacity: 0;
    transition: all 0.2s;
    z-index: 10;
}

.dark .copy-button {
    background-color: rgba(255, 255, 255, 0.05);
}

.code-container:hover .copy-button {
    opacity: 1;
}

.copy-button:hover {
    background-color: rgba(0, 0, 0, 0.1);
    color: var(--text-bright);
}

.dark .copy-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.copy-button.copied {
    border-color: #2ea043;
    color: #3fb950;
}

/* Toggle Buttons & Icons */
.toggle-btn {
    padding: 8px;
    cursor: pointer;
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.toggle-btn:hover {
    color: var(--text-bright);
    background-color: var(--hover-bg);
}

/* Status Bar */
.status-bar {
    height: 22px;
    background-color: var(--status-bg);
    color: white;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    flex-shrink: 0;
}

/* Announcement Bar */
.announcement-bar {
    min-height: 30px;
    background: var(--announcement-bg);
    color: white;
    font-size: 11px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6px 20px;
    letter-spacing: 0.5px;
    z-index: 100;
    flex-wrap: wrap;
    flex-shrink: 0;
}

/* Right Sidebar Table of Contents */
.right-sidebar {
    width: 260px;
    background-color: var(--bg-editor);
    border-left: 1px solid var(--border-color);
    padding: 40px 24px;
    font-size: 12px;
    overflow-y: auto;
    color: var(--text-main);
}

.right-sidebar .toc {
    position: sticky;
    top: 24px;
}

.right-sidebar .toc ul {
    list-style: none;
    padding: 0;
}

.right-sidebar .toc li {
    margin: 0;
}

.right-sidebar .toc ul ul {
    padding-left: 12px;
    margin-top: 4px;
    margin-bottom: 4px;
    border-left: 1px solid var(--border-color);
}

.right-sidebar .toc a {
    display: block;
    padding: 4px 0;
    color: var(--text-main);
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.right-sidebar .toc a:hover {
    color: var(--text-bright);
    padding-left: 4px;
}

.right-sidebar .toc a.active-toc {
    color: var(--accent-color);
    font-weight: 600;
    padding-left: 4px;
    border-left: 2px solid var(--accent-color);
}

/* Search Highlights */
.search-highlight {
    background-color: var(--search-highlight-bg);
    border-bottom: 1px solid var(--search-highlight-border);
    border-radius: 2px;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 40px;
    right: 20px;
    background-color: rgba(0, 122, 204, 0.4);
    backdrop-filter: blur(4px);
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

@media (min-width: 769px) {
    .scroll-to-top {
        bottom: 40px;
        right: 40px;
        left: auto;
        transform: none;
        background-color: rgba(0, 0, 0, 0.05);
        color: var(--text-main);
        width: 130px;
        height: 36px;
        border-radius: 8px;
        font-size: 11px;
        gap: 8px;
    }
    
    .dark .scroll-to-top {
        background-color: rgba(255, 255, 255, 0.08);
    }
    
    @media (min-width: 1280px) {
        .scroll-to-top {
            right: 300px;
        }
    }
    
    .scroll-to-top::after {
        content: 'Back to Top';
        font-weight: 500;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    
    .scroll-to-top:hover {
        background-color: var(--accent-color);
        color: white;
        transform: translateY(-5px);
        width: 140px;
    }

    .scroll-to-top.hidden {
        transform: translateY(20px);
        opacity: 0;
    }
}

.scroll-to-top:hover {
    background-color: var(--accent-color);
    transform: scale(1.1);
}

.scroll-to-top.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-20px) scale(0.8);
}

@keyframes pulseButton {
    0% { box-shadow: 0 0 0 0 rgba(0, 122, 204, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(0, 122, 204, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 122, 204, 0); }
}

.scroll-to-top:not(.hidden) {
    animation: pulseButton 2s infinite;
}

/* Custom Scrollbars */
::-webkit-scrollbar { 
    width: 10px; 
    height: 10px; 
}

::-webkit-scrollbar-track { 
    background: transparent; 
}

::-webkit-scrollbar-thumb { 
    background: rgba(0, 0, 0, 0.15); 
    border-radius: 4px;
}

.dark ::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
}

::-webkit-scrollbar-thumb:hover { 
    background: rgba(0, 0, 0, 0.25); 
}

.dark ::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

.flex-1.overflow-y-auto {
    scroll-behavior: smooth;
}

/* Dynamic Code Syntax Highlighting using CSS Variables */
.highlight .hll { background-color: var(--code-bg) }
.highlight { 
    background: var(--code-bg); 
    color: var(--code-text); 
    border-radius: 8px; 
    padding: 1rem; 
    margin-bottom: 1.5rem; 
    border: 1px solid var(--border-color);
    overflow-x: auto;
}
.highlight pre {
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    border-radius: 0 !important;
    overflow-x: visible !important;
}
.highlight .c { color: var(--code-comment) }
.highlight .err { color: #ef4444; }
.highlight .k { color: var(--code-keyword) }
.highlight .l { color: var(--code-number) }
.highlight .n { color: var(--code-name) }
.highlight .o { color: var(--code-operator) }
.highlight .p { color: var(--code-text) }
.highlight .cm { color: var(--code-comment) }
.highlight .cp { color: var(--code-comment) }
.highlight .c1 { color: var(--code-comment) }
.highlight .cs { color: var(--code-comment) }
.highlight .ge { font-style: italic }
.highlight .gs { font-weight: bold }
.highlight .kc { color: var(--code-keyword) }
.highlight .kd { color: var(--code-keyword) }
.highlight .kn { color: var(--code-keyword) }
.highlight .kp { color: var(--code-keyword) }
.highlight .kr { color: var(--code-keyword) }
.highlight .kt { color: var(--code-keyword) }
.highlight .ld { color: var(--code-string) }
.highlight .m { color: var(--code-number) }
.highlight .s { color: var(--code-string) }
.highlight .na { color: var(--code-name) }
.highlight .nb { color: var(--code-builtin) }
.highlight .nc { color: var(--code-class) }
.highlight .no { color: var(--code-name) }
.highlight .nd { color: var(--code-name) }
.highlight .ni { color: var(--code-name) }
.highlight .ne { color: var(--code-class) }
.highlight .nf { color: var(--code-function) }
.highlight .nl { color: var(--code-name) }
.highlight .nn { color: var(--code-name) }
.highlight .nx { color: var(--code-name) }
.highlight .py { color: var(--code-name) }
.highlight .nt { color: var(--code-keyword) }
.highlight .nv { color: var(--code-name) }
.highlight .ow { color: var(--code-operator) }
.highlight .w { color: var(--code-text) }
.highlight .mf { color: var(--code-number) }
.highlight .mh { color: var(--code-number) }
.highlight .mi { color: var(--code-number) }
.highlight .mo { color: var(--code-number) }
.highlight .sb { color: var(--code-string) }
.highlight .sc { color: var(--code-string) }
.highlight .sd { color: var(--code-comment) }
.highlight .s2 { color: var(--code-string) }
.highlight .se { color: var(--code-number) }
.highlight .sh { color: var(--code-string) }
.highlight .si { color: var(--code-string) }
.highlight .sx { color: var(--code-string) }
.highlight .sr { color: var(--code-string) }
.highlight .s1 { color: var(--code-string) }
.highlight .ss { color: var(--code-string) }
.highlight .bp { color: var(--code-builtin); }
.highlight .vc { color: var(--code-name) }
.highlight .vg { color: var(--code-name) }
.highlight .vi { color: var(--code-name) }
.highlight .il { color: var(--code-number) }

.highlighttable {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
    padding: 0;
}

.highlighttable .linenos,
.highlighttable .linenos * {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    pointer-events: none;
}

.highlighttable .linenos {
    background-color: transparent;
    color: var(--text-main);
    opacity: 0.5;
    padding-right: 15px;
    text-align: right;
    border-right: 1px solid var(--border-color);
    width: 1%;
    white-space: nowrap;
}

.highlighttable .code {
    padding-left: 15px;
    background-color: transparent;
}

/* Responsive Rules */
@media (max-width: 1200px) {
    .right-sidebar {
        display: none;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        z-index: 1000;
        height: 100vh;
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.15);
        transform: translateX(0);
        width: 280px;
        background-color: var(--bg-sidebar);
    }

    .sidebar.collapsed {
        transform: translateX(-100%);
        display: flex !important;
        opacity: 1;
    }

    .editor-content {
        padding: 1.5rem 1rem;
    }

    .prose table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
    }

    .prose pre {
        max-width: 100%;
        overflow-x: auto;
    }

    .prose img {
        max-width: 100%;
        height: auto;
    }

    .tabs-container {
        display: none;
    }

    .status-bar {
        display: none !important;
    }

    .announcement-bar {
        display: none;
    }
    
    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background-color: rgba(0, 0, 0, 0.4);
        backdrop-filter: blur(2px);
        z-index: 900;
    }
    
    .sidebar:not(.collapsed) + .sidebar-overlay {
        display: block;
    }

    .page-nav {
        padding-left: 1rem;
        padding-right: 1rem;
        gap: 0.5rem;
    }
    
    .page-nav > div {
        flex: 1;
        min-width: 0;
    }

    .page-nav .text-blue-600 {
        font-size: 11px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .page-meta .space-x-4 > * + * {
        margin-left: 0;
    }
}