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

:root {
    --primary-color: #4a90e2;
    --secondary-color: #f39c12;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --dark-bg: #2c3e50;
    --light-bg: #ecf0f1;
    --text-dark: #333;
    --text-light: #666;
    --border-color: #ddd;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-hover);
    overflow: hidden;
}

/* Header */
header {
    background: var(--dark-bg);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--light-bg);
}

/* Main Content */
main {
    padding: 30px;
}

/* Converter Section */
.converter-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.input-section,
.output-section {
    display: flex;
    flex-direction: column;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.section-header h2 {
    font-size: 1.3rem;
    color: var(--text-dark);
}

textarea {
    width: 100%;
    min-height: 300px;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    resize: vertical;
    transition: border-color 0.3s;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

#v2ex-output {
    background-color: #f8f9fa;
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #357abd;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #e67e22;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Copy Message */
.copy-message {
    display: none;
    margin-top: 10px;
    padding: 10px;
    background-color: var(--success-color);
    color: white;
    border-radius: 6px;
    text-align: center;
    animation: fadeInOut 2s;
}

.copy-message.show {
    display: block;
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0; }
    10%, 90% { opacity: 1; }
}

/* Preview Section */
.preview-section {
    margin-bottom: 30px;
    padding: 20px;
    background-color: var(--light-bg);
    border-radius: 8px;
}

.preview-content {
    min-height: 200px;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    border: 2px solid var(--border-color);
}

.preview-content h1 {
    font-size: 2rem;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.preview-content h2 {
    font-size: 1.6rem;
    margin-top: 20px;
    margin-bottom: 12px;
}

.preview-content h3 {
    font-size: 1.3rem;
    margin-top: 15px;
    margin-bottom: 10px;
}

.preview-content p {
    margin-bottom: 15px;
}

.preview-content code {
    background-color: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

.preview-content pre {
    background-color: #f4f4f4;
    padding: 15px;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 15px;
}

.preview-content pre code {
    background: none;
    padding: 0;
}

.preview-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 15px;
    margin: 15px 0;
    color: var(--text-light);
    font-style: italic;
}

.preview-content ul,
.preview-content ol {
    margin-bottom: 15px;
    padding-left: 30px;
}

.preview-content li {
    margin-bottom: 5px;
}

.preview-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.preview-content a:hover {
    text-decoration: underline;
}

.preview-content hr {
    border: none;
    border-top: 2px solid var(--border-color);
    margin: 20px 0;
}

/* Info Section */
.info-section {
    margin-bottom: 30px;
}

.info-section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.syntax-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.syntax-item {
    padding: 20px;
    background-color: var(--light-bg);
    border-radius: 8px;
    border: 2px solid var(--border-color);
}

.syntax-item h3 {
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.syntax-item ul {
    list-style: none;
}

.syntax-item li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.syntax-item li:last-child {
    border-bottom: none;
}

.syntax-item strong {
    color: var(--primary-color);
}

/* Footer */
footer {
    background-color: var(--dark-bg);
    color: white;
    padding: 20px;
    text-align: center;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    margin: 0 10px;
}

footer a:hover {
    text-decoration: underline;
}

.license {
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--light-bg);
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    .converter-section,
    .syntax-grid {
        grid-template-columns: 1fr;
    }

    textarea {
        min-height: 200px;
    }

    main {
        padding: 15px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    /* Optional: Add dark mode styles if needed */
}