:root {
    --primary-color: #6a1b9a; /* Deeper purple */
    --primary-light-color: #9c27b0;
    --secondary-color: #00bcd4; /* Cyan */
    --background-color: #1a1a2e; /* Dark blue-purple */
    --surface-color: #2a2a4a; /* Slightly lighter surface */
    --text-color: #e0e0e0;
    --text-light-color: #f0f0f0;
    --border-color: #4a4a6e;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --border-radius-lg: 12px;
    --border-radius-md: 8px;
    --border-radius-sm: 4px;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Inter', 'JetBrains Mono', monospace; /* Using Inter for general text, JetBrains for code */
    margin: 0;
    overflow: hidden;
    cursor: default;
    line-height: 1.6;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
}
::-webkit-scrollbar-thumb {
    background: var(--primary-light-color);
    border-radius: var(--border-radius-lg);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

.container {
    display: flex;
    height: 100vh;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.sidebar {
    width: 300px;
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1rem;
    box-shadow: 2px 0 10px var(--shadow-color);
    border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

#search-bar {
    flex-grow: 1;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-md);
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
    margin-right: 0.5rem;
}

#search-bar:focus {
    outline: none;
    border-color: var(--primary-light-color);
    box-shadow: 0 0 0 3px rgba(156, 39, 176, 0.3);
}

/* Animated Button Styles */
.neon-button {
    background-color: var(--primary-color);
    border: none;
    color: var(--text-light-color);
    padding: 0.75rem 1.25rem;
    font-size: 1.2rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(106, 27, 154, 0.4);
    position: relative;
    overflow: hidden;
    font-weight: bold;
}

.neon-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300%;
    height: 300%;
    background-color: rgba(255, 255, 255, 0.15);
    transition: all 0.6s ease-out;
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    z-index: 0;
}

.neon-button:hover::before {
    transform: translate(-50%, -50%) scale(1);
}

.neon-button:hover {
    background-color: var(--primary-light-color);
    box-shadow: 0 6px 15px rgba(156, 39, 176, 0.6);
    transform: translateY(-2px);
}

.neon-button-small {
    background-color: var(--secondary-color);
    border: none;
    color: var(--background-color);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 3px 8px rgba(0, 188, 212, 0.3);
    position: relative;
    overflow: hidden;
    font-weight: 500;
}

.neon-button-small::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300%;
    height: 300%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: all 0.5s ease-out;
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    z-index: 0;
}

.neon-button-small:hover::before {
    transform: translate(-50%, -50%) scale(1);
}

.neon-button-small:hover {
    background-color: #00e5ff;
    box-shadow: 0 4px 10px rgba(0, 188, 212, 0.5);
    transform: translateY(-1px);
}

.page-list {
    flex-grow: 1;
    overflow-y: auto;
    padding-right: 0.5rem; /* For scrollbar space */
}

.page-item {
    padding: 0.8rem 1rem;
    margin-bottom: 0.5rem;
    background-color: var(--background-color);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 5px var(--shadow-color);
}

.page-item:hover {
    background-color: var(--primary-color);
    transform: translateX(5px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.page-item.active {
    background-color: var(--primary-light-color);
    color: var(--text-light-color);
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(156, 39, 176, 0.4);
}

.main-content {
    flex-grow: 1;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    background-color: var(--background-color);
}

.editor-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

#page-title {
    flex-grow: 1;
    background: none;
    border: none;
    color: var(--text-light-color);
    font-size: 2.2rem;
    font-weight: bold;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

#page-title:focus {
    outline: none;
    text-shadow: 0 0 5px var(--secondary-color);
}

#editor,
.markdown-preview {
    flex-grow: 1;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-color);
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.2);
    overflow-y: auto;
    transition: all 0.3s ease;
}

#editor:focus {
    outline: none;
    border-color: var(--primary-light-color);
    box-shadow: 0 0 0 3px rgba(156, 39, 176, 0.3), inset 0 2px 5px rgba(0, 0, 0, 0.2);
}

#editor:empty:before {
    content: attr(data-placeholder);
    color: #888;
    pointer-events: none;
}

/* Markdown Preview Specific Styling */
.markdown-preview h1, h2, h3, h4, h5, h6 {
    color: var(--secondary-color);
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    line-height: 1.3;
}
.markdown-preview h1 { font-size: 2.2em; border-bottom: 2px solid var(--secondary-color); padding-bottom: 0.3em; }
.markdown-preview h2 { font-size: 1.8em; border-bottom: 1px solid var(--secondary-color); padding-bottom: 0.3em; }
.markdown-preview h3 { font-size: 1.5em; }
.markdown-preview p { margin-bottom: 1em; }
.markdown-preview a { color: var(--primary-light-color); text-decoration: none; transition: color 0.2s ease; }
.markdown-preview a:hover { color: var(--primary-color); text-decoration: underline; }
.markdown-preview strong { color: var(--text-light-color); }
.markdown-preview em { font-style: italic; }
.markdown-preview ul, .markdown-preview ol {
    margin-bottom: 1em;
    padding-left: 1.5em;
}
.markdown-preview ul li { list-style-type: disc; }
.markdown-preview ol li { list-style-type: decimal; }
.markdown-preview blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1em;
    margin-left: 0;
    color: #b0b0b0;
    font-style: italic;
}
.markdown-preview table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1em;
}
.markdown-preview th, .markdown-preview td {
    border: 1px solid var(--border-color);
    padding: 0.8em;
    text-align: left;
}
.markdown-preview th {
    background-color: var(--primary-color);
    color: var(--text-light-color);
}
.markdown-preview hr {
    border: none;
    border-top: 1px dashed var(--border-color);
    margin: 2em 0;
}

/* Code block styling (Prism.js overrides) */
.markdown-preview pre {
    background-color: var(--background-color);
    border-radius: var(--border-radius-md);
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px var(--shadow-color);
}
.markdown-preview code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    background-color: var(--background-color); /* Ensure inline code has consistent background */
    border-radius: var(--border-radius-sm);
    padding: 0.2em 0.4em;
}
/* Ensure Prism.js syntax highlighting colors are visible against the dark background */
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #6a9955; } /* Greenish */
.token.punctuation { color: #d4d4d4; } /* Light grey */
.token.namespace { opacity: .7; }
.token.property, .token.tag, .token.boolean, .token.number, .token.constant, .token.symbol, .token.deleted { color: #b5cea8; } /* Light green-blue */
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted { color: #d69d85; } /* Orange-pink */
.token.operator, .token.entity, .token.url, .language-css .token.string, .style .token.string { color: #d4d4d4; } /* Light grey */
.token.atrule, .token.attr-value, .token.keyword { color: #569cd6; } /* Blue */
.token.function, .token.class-name { color: #dcdcaa; } /* Yellow-green */
.token.regex, .token.important, .token.variable { color: #cd97ea; } /* Purple */

/* Additional Font for a cleaner look */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;700&display=swap');