:root {
    --accent: #1a936f;               
    --accent-light: #88d498;         
    --accent-dark: #147a5c;         
    --text-color: #000000;      
    --text-light: #444444;         
    --text-lighter: #666666;        
    --bg-color: #ffffff;            
    --bg-light: #f8f8f8;            
    --bg-lighter: #fcfcfc;          
    --border-color: #e0e0e0;      
    --border-light: #eeeeee;        
    --code-bg: #f5f5f5;             
    --code-border: #ddd;            
    --link-color: #1a936f;          
    --link-hover: #147a5c;           
    --shadow: rgba(0, 0, 0, 0.05);  
    --shadow-hover: rgba(0, 0, 0, 0.08);
    --radius: 12px;                 
    --radius-small: 8px;             
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f5f5f5;
}

::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-dark);
}

* {
    scrollbar-width: thin;
    scrollbar-color: var(--accent) #f5f5f5;
}

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

html, body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    scroll-behavior: smooth;
    min-width: 320px;
    width: 100%;
    overflow-x: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
    padding: 0 20px;
}

header {
    display: flex;
    justify-content: center;
    padding: 25px 0;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 30px;
    background-color: var(--bg-color);
}

.nav-buttons {
    display: flex;
    gap: 30px;
}

.nav-btn {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.2s ease;
    padding: 8px 16px;
    border-radius: var(--radius-small);
    background: none;
    border: none;
    cursor: pointer;
}

.nav-btn:hover {
    color: var(--accent);
    background-color: var(--bg-light);
}

.nav-btn i {
    font-size: 1.2rem;
}

main {
    flex: 1;
    padding: 0 0 30px 0;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-main);
    font-weight: 700;
    color: var(--text-color);
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.3em;
    margin-top: 0;
}

h2 {
    font-size: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3em;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1rem;
}

h6 {
    font-size: 0.875rem;
    color: var(--text-lighter);
}

p {
    margin-bottom: 1.5em;
    font-size: 1.1rem;
    line-height: 1.7;
}

strong {
    font-weight: 700;
}

em {
    font-style: italic;
}

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

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

hr {
    border: none;
    border-top: 2px solid var(--border-color);
    margin: 2.5em 0;
}

blockquote {
    border-left: 4px solid var(--accent-light);
    padding: 1em 1.5em;
    margin: 1.5em 0;
    background-color: var(--bg-lighter);
    border-radius: 0 var(--radius-small) var(--radius-small) 0;
    font-style: italic;
    color: var(--text-light);
}

blockquote p {
    margin-bottom: 0.5em;
}

blockquote p:last-child {
    margin-bottom: 0;
}

ul, ol {
    margin-bottom: 1.5em;
    padding-left: 2em;
}

li {
    margin-bottom: 0.5em;
    line-height: 1.6;
}

li > p {
    margin-bottom: 0.5em;
}

ul ul, ol ol, ul ol, ol ul {
    margin-top: 0.5em;
    margin-bottom: 0.5em;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 1.5em;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-small);
    overflow: hidden;
}

th {
    background-color: var(--bg-light);
    font-weight: 600;
    text-align: left;
    padding: 0.75em 1em;
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 0.75em 1em;
    border-top: 1px solid var(--border-light);
}

tr:nth-child(even) {
    background-color: var(--bg-lighter);
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-small);
    margin: 1.5em 0;
}

img + em {
    display: block;
    text-align: center;
    font-size: 0.9em;
    color: var(--text-lighter);
    margin-top: -1em;
    margin-bottom: 1.5em;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background-color: var(--code-bg);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    color: var(--text-color);
}

pre {
    background-color: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: var(--radius-small);
    padding: 1.5em;
    overflow-x: auto;
    margin: 1.5em 0;
    font-size: 0.95em;
    line-height: 1.5;
}

pre code {
    background-color: transparent;
    padding: 0;
    border-radius: 0;
    color: var(--text-color);
    font-size: 0.95em;
    display: block;
    overflow-x: auto;
}

pre code .keyword,
code .keyword {
    color: var(--accent);
    font-weight: 700;
}

.keyword-echo,
.keyword-exit,
.keyword-goto,
.keyword-if,
.keyword-delete,
.keyword-var,
.keyword-const,
.keyword-else,
.keyword-as {
    color: var(--accent) !important;
    font-weight: 700 !important;
}

pre code .string {
    color: #4070a0;
}

pre code .comment {
    color: #60a0b0;
    font-style: italic;
}

pre code .number {
    color: #40a070;
}

pre code .operator {
    color: #666666;
}

span.kw { color: var(--accent); font-weight: bold; }
span.dt { color: #902000; }
span.dv { color: #40a070; }
span.bn { color: #40a070; }
span.fl { color: #40a070; }
span.ch { color: #4070a0; }
span.st { color: #4070a0; }
span.co { color: #60a0b0; font-style: italic; }
span.ot { color: #007020; }
span.al { color: #ff0000; font-weight: bold; }
span.fu { color: #06287e; }
span.er { color: #ff0000; font-weight: bold; }
span.wa { color: #60a0b0; font-weight: bold; font-style: italic; }
span.cn { color: #880000; }
span.sc { color: #4070a0; }
span.vs { color: #4070a0; }
span.ss { color: #bb6688; }
span.im { color: #008000; font-weight: bold; }
span.va { color: #19177c; }
span.cf { color: #007020; font-weight: bold; }
span.op { color: #666666; }
span.bu { color: #008000; }
span.ex { color: #007020; font-weight: bold; }
span.pp { color: #bc7a00; }
span.at { color: #7d9029; }
span.do { color: #ba2121; font-style: italic; }
span.an { color: #60a0b0; font-weight: bold; font-style: italic; }
span.cv { color: #60a0b0; font-weight: bold; font-style: italic; }
span.in { color: #60a0b0; font-weight: bold; font-style: italic; }

pre.numberSource {
    border-left: 3px solid var(--accent-light);
    padding-left: 1.5em;
}

.sourceCode {
    margin: 1.5em 0;
    border-radius: var(--radius-small);
    overflow: hidden;
    border: 1px solid var(--code-border);
}

.sourceCode pre {
    margin: 0;
    border: none;
    border-radius: 0;
}

footer {
    text-align: center;
    padding: 20px 0 15px;
    border-top: 2px solid var(--border-color);
    color: var(--text-lighter);
    font-size: 0.9rem;
    margin-top: 10px;
}

.author-link {
    color: var(--link-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.author-link:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

footer p {
    margin-bottom: 8px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    header {
        padding: 20px 0;
        margin-bottom: 20px;
    }
    
    .nav-buttons {
        gap: 15px;
    }
    
    .nav-btn span {
        display: none;
    }
    
    main {
        padding: 0 0 20px 0;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
    
    p {
        font-size: 1rem;
    }
    
    pre {
        padding: 1em;
        font-size: 0.9em;
    }
    
    footer {
        padding: 15px 0 10px;
        margin-top: 5px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    
    header {
        padding: 15px 0;
        margin-bottom: 15px;
    }
    
    .nav-buttons {
        gap: 10px;
    }
    
    .nav-btn {
        padding: 6px 10px;
    }
    
    main {
        padding: 0 0 15px 0;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.25rem;
    }
    
    h3 {
        font-size: 1.1rem;
    }
    
    ul, ol {
        padding-left: 1.5em;
    }
    
    pre {
        padding: 0.8em;
        font-size: 0.85em;
    }
    
    footer {
        padding: 12px 0 8px;
        font-size: 0.85rem;
    }
}

p strong:first-child {
    color: var(--text-light);
}

table {
    word-break: break-word;
}

.task-list-item {
    list-style-type: none;
    margin-left: -1.5em;
}

.task-list-item input[type="checkbox"] {
    margin-right: 0.5em;
}

figcaption {
    text-align: center;
    font-size: 0.9em;
    color: var(--text-lighter);
    margin-top: -1em;
    margin-bottom: 1.5em;
}

@media (max-width: 768px) {
    .nav-btn i {
        font-size: 1.4rem;
    }
}

img, table, pre {
    max-width: 100%;
}

main > *:first-child {
    margin-top: 0;
}

main > *:last-child {
    margin-bottom: 0;
}

pre, .sourceCode {
    width: 100%;
    max-width: 100%;
}