/* styles.css */
:root {
    --bg-primary: #F5F7FA;
    --bg-secondary: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --accent-blue: #007BFF;
    --accent-orange: #FF7A00;
    --primary-color: #007BFF;
    --border-color: #e1e5e9;
    --shadow: 0 2px 6px rgba(0,0,0,0.08);
    --code-bg: #f8f9fa;
}

[data-theme="dark"] {
    --bg-primary: #1e1e1e;
    --bg-secondary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --primary-color: #4da3ff;
    --border-color: #404040;
    --shadow: 0 2px 6px rgba(0,0,0,0.3);
    --code-bg: #2d2d2d;
}

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

body {
    font-family: 'Inter', 'Helvetica Neue', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: all 0.3s ease;
}

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

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.brand-logo {
    height: 36px;
    width: auto;
}

.logo-img {
    height: 32px;
    width: auto;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: bold;
}

.brand-format {
    color: #007BFF;
}

.brand-dot {
    color: #666;
}

.brand-cool {
    color: #FF7A00;
}

nav {
    display: flex;
    align-items: center;
    gap: 15px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 5px;
    align-items: center;
}

nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

nav a:hover {
    color: var(--accent-blue);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-actions li {
    list-style: none;
}

nav a.active {
    background: var(--accent-blue);
    color: white;
}

#theme-toggle {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 4px;
    line-height: 1;
}

#lang-toggle {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
    font-weight: bold;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 4px;
    color: var(--text-primary);
    line-height: 1;
    min-width: 40px;
}

#lang-toggle:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

/* Format Selector */
.format-selector {
    display: flex;
    gap: 10px;
    padding: 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    justify-content: center;
}

.format-btn {
    padding: 10px 20px;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.format-btn:hover {
    border-color: var(--accent-blue);
}

.format-btn.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

/* Main Layout */
main {
    display: flex;
    flex: 1;
    gap: 1px;
    background: var(--border-color);
}

.input-section {
    flex: 1;
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.output-section {
    width: 50%;
    min-width: 400px;
    max-width: 800px;
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
}

.input-header, .output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}

.input-header h3, .output-header h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.input-controls, .output-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.view-tabs {
    display: flex;
    gap: 5px;
}

.tab-btn {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
}

.tab-btn.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

button {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

button:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

.guide-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-size: inherit;
}

.guide-link:hover {
    text-decoration: underline;
}

.guide-main {
    max-width: 100%;
    margin: 0 auto;
    padding: 20px;
}

.guide-header {
    text-align: center;
    margin-bottom: 30px;
}

.guide-header h1 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.guide-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.guide-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
}

.guide-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.guide-card h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.guide-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.guide-list {
    list-style: none;
    padding: 0;
    margin: 0;
    flex: 1;
    min-width: 0;
}

.guide-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    line-height: 1.5;
    border-bottom: 1px solid var(--border-color);
}

.guide-list li:last-child {
    border-bottom: none;
}

.guide-code {
    background: #2d2d2d;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 15px;
    overflow-x: auto;
}

.guide-code code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    color: #e0e0e0;
}

.guide-example {
    background: #2d2d2d;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 10px;
    overflow-x: auto;
    max-width: 100%;
}

.guide-example code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    color: #e0e0e0;
    white-space: pre;
}

.guide-preview {
    padding: 10px;
    border: 1px dashed var(--border-color);
    border-radius: 4px;
    margin-bottom: 15px;
    background: var(--bg-secondary);
    max-width: 100%;
    overflow-x: auto;
}

.guide-preview img {
    max-width: 100%;
    height: auto;
    max-height: 200px;
}

.guide-preview h1, .guide-preview h2, .guide-preview h3,
.guide-preview h4, .guide-preview h5, .guide-preview h6 {
    margin: 0.5em 0;
}

.guide-preview code {
    background: #f0f0f0;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
}

[data-theme="dark"] .guide-preview code {
    background: #3d3d3d;
}

.guide-toc-wrapper {
    display: flex;
    gap: 20px;
    position: relative;
}

.guide-toc {
    flex-shrink: 0;
    width: min(25vw, 300px);
    position: sticky;
    top: 20px;
    align-self: flex-start;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.guide-toc-title {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-color);
}

.guide-toc-section {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 12px;
    padding: 6px 0 4px;
    border-bottom: 1px solid var(--border-color);
}

.guide-toc-section:first-of-type {
    margin-top: 4px;
}

.guide-toc a {
    display: flex;
    align-items: center;
    position: relative;
    padding: 5px 8px;
    padding-left: 24px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-decoration: none;
    background: transparent;
    border-radius: 4px;
    transition: all 0.2s ease;
    text-align: left;
}

.guide-toc a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 1px;
    background: var(--border-color);
}

.guide-toc a::after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--border-color);
    transition: all 0.2s ease;
}

.guide-toc a:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.guide-toc a:hover::after {
    background: var(--primary-color);
}

.guide-toc a.active {
    color: var(--primary-color);
    background: var(--bg-secondary);
    font-weight: 500;
}

.guide-toc a.active::after {
    background: var(--primary-color);
    box-shadow: 0 0 0 2px var(--bg-secondary), 0 0 0 4px var(--primary-color);
}

.guide-syntax {
    margin-bottom: 8px;
    border-left: 3px solid var(--primary-color);
    padding-left: 10px;
}

.guide-syntax-badge {
    display: inline-block;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
}

.guide-syntax-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 5px 0 10px 0;
}

.guide-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    min-width: 600px;
}

.guide-table th,
.guide-table td {
    padding: 10px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.guide-table th {
    background: var(--bg-code);
    color: var(--text-primary);
    font-weight: 600;
}

.guide-error {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.error-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 10px;
    background: var(--bg-code);
    border-radius: 4px;
}

.error-label {
    background: var(--accent-red);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.error-item code {
    font-family: 'Consolas', 'Monaco', monospace;
    color: var(--text-primary);
}

.error-desc {
    color: var(--accent-red);
}

.guide-footer {
    text-align: center;
    margin-top: 30px;
}

.guide-back-btn {
    display: inline-block;
    padding: 10px 20px;
    background: var(--accent-blue);
    color: white;
    border-radius: 4px;
    text-decoration: none;
    transition: background 0.2s;
}

.guide-back-btn:hover {
    background: var(--accent-blue-dark);
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle::after {
    content: ' ▼';
    font-size: 0.7em;
}

.dropdown-menu {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    min-width: 180px;
    box-shadow: var(--shadow);
    z-index: 1000;
}

.dropdown-menu a {
    display: block;
    padding: 10px 16px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background: var(--accent-blue);
    color: white;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

/* Input Area */
#input-area {
    flex: 1;
    border: none;
    outline: none;
    padding: 20px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 14px;
    line-height: 1.5;
    background: var(--code-bg);
    color: var(--text-primary);
    resize: none;
}

/* Samples */
.samples {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.samples span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-right: 10px;
}

.sample-btn {
    padding: 4px 12px;
    font-size: 0.8rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 12px;
    cursor: pointer;
}

.sample-btn:hover {
    background: var(--accent-orange);
    color: white;
    border-color: var(--accent-orange);
}

/* Output Area */
#output-area {
    flex: 1;
    padding: 20px;
    overflow: auto;
    position: relative;
}

.placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
}

.placeholder svg {
    margin-bottom: 15px;
    opacity: 0.5;
}

.placeholder p {
    font-size: 1.1rem;
}

/* Code Output */
.code-output {
    background: var(--code-bg);
    border-radius: 6px;
    overflow: hidden;
}

.code-output pre {
    margin: 0;
    padding: 20px;
    overflow-x: auto;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 14px;
    line-height: 1.5;
}

.code-output code {
    font-family: inherit;
}

/* Preview Output */
.preview-output {
    background: var(--code-bg);
    border-radius: 6px;
    padding: 20px;
    min-height: 300px;
}

/* Fullscreen Mode */
.fullscreen-btn {
    padding: 6px 12px;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.fullscreen-btn:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

.fullscreen-btn svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    flex-shrink: 0;
}

.fullscreen-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    z-index: 9999;
    display: none;
    flex-direction: column;
}

.fullscreen-overlay.active {
    display: flex;
}

.fullscreen-overlay .fullscreen-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.fullscreen-overlay .fullscreen-content {
    flex: 1;
    overflow: auto;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    cursor: grab;
}

.fullscreen-overlay .fullscreen-content .preview-output,
.fullscreen-overlay .fullscreen-content .code-output {
    width: 100%;
    max-width: 95vw;
    min-height: calc(100vh - 80px);
    transform-origin: top center;
}

.fullscreen-overlay .close-fullscreen-btn {
    padding: 8px 16px;
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

/* Zoom Controls */
.zoom-controls {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px;
}

.zoom-btn {
    padding: 4px 6px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    border-radius: 3px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.zoom-btn:hover {
    background: var(--accent-blue);
    color: white;
}

.zoom-btn svg {
    width: 14px;
    height: 14px;
}

.zoom-level {
    font-size: 0.75rem;
    min-width: 40px;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    main {
        flex-direction: column;
    }
    
    .format-selector {
        flex-wrap: wrap;
    }
    
    .input-header, .output-header {
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
    }
    
    .input-controls, .output-controls, .view-tabs {
        justify-content: center;
    }
}

/* Home Page Styles */
.home-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 40px 20px;
    max-width: 100%;
    margin: 0 auto;
    width: 100%;
}

.hero {
    text-align: center;
    padding: 60px 20px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.hero .highlight {
    color: var(--accent-blue);
}

.subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 50px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.tool-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px 30px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
    border-color: var(--accent-blue);
}

.tool-icon {
    color: var(--accent-blue);
    margin-bottom: 20px;
}

.tool-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.tool-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.features {
    padding: 60px 20px;
    text-align: center;
}

.features h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.feature-item {
    padding: 20px;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.feature-item h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.feature-item p {
    color: var(--text-secondary);
}

footer {
    text-align: center;
    padding: 30px 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.help-section,.about-section{padding:40px 20px;max-width:100%;margin:0 auto;width:100%}
.help-section h1,.about-section h1{font-size:2.5rem;margin-bottom:15px;color:var(--text-primary);text-align:center}
.subtitle{font-size:1.2rem;color:var(--text-secondary);margin-bottom:40px;text-align:center}
.help-grid,.about-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:25px;margin-bottom:50px}
.help-card,.about-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:12px;padding:30px;box-shadow:var(--shadow)}
.help-card h3,.about-card h3{font-size:1.3rem;margin-bottom:20px;color:var(--text-primary)}
.help-card ul,.about-card ul{list-style:none;padding:0}
.help-card li,.about-card li{padding:8px 0;color:var(--text-secondary);border-bottom:1px solid var(--border-color)}
.help-card li:last-child,.about-card li:last-child{border-bottom:none}
.help-shortcuts{padding:40px 20px;background:var(--bg-secondary);border-radius:12px;margin-top:40px}
.help-shortcuts h2{font-size:1.8rem;margin-bottom:30px;color:var(--text-primary);text-align:center}
.shortcut-table{display:flex;flex-direction:column;gap:15px;max-width:500px;margin:0 auto}
.shortcut-row{display:flex;justify-content:space-between;padding:12px 20px;background:var(--bg-primary);border-radius:8px}
.shortcut-key{font-family:'JetBrains Mono',monospace;background:var(--accent-blue);color:white;padding:4px 12px;border-radius:4px;font-size:0.9rem}
.about-hero{text-align:center;padding:40px 0}
.about-logo{width:120px;height:120px;margin-bottom:20px}
.version{color:var(--text-secondary);margin-top:10px}
.feature-list li{padding:10px 0;border-bottom:1px solid var(--border-color)}
.feature-list li:last-child{border-bottom:none}
.about-footer{text-align:center;padding:40px 0;border-top:1px solid var(--border-color);margin-top:40px}
.made-with{margin-top:10px;color:var(--text-secondary)}

.timeline{padding-left:20px;border-left:2px solid var(--border-color);margin:20px 0}
.timeline-item{position:relative;margin-bottom:25px;padding-left:20px}
.timeline-item::before{content:'';position:absolute;left:-26px;top:5px;width:10px;height:10px;background:var(--accent-blue);border-radius:50%}
.timeline-item.future::before{background:var(--accent-orange)}
.timeline-date{font-size:0.85rem;color:var(--text-secondary);margin-bottom:5px}
.timeline-content h4{font-size:1rem;color:var(--text-primary);margin-bottom:5px}
.timeline-content p{font-size:0.9rem;color:var(--text-secondary)}
.changelog{background:var(--bg-secondary);padding:50px 20px;margin:0}
.changelog h2{font-size:1.8rem;text-align:center;margin-bottom:30px;color:var(--text-primary)}
.changelog .timeline{max-width:800px;margin:0 auto}

/* Responsive for home page */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
}