/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #7d8590;
    --text-muted: #656d76;
    --border-color: #30363d;
    --accent-color: #58a6ff;
    --accent-hover: #4493f8;
    --success-color: #3fb950;
    --warning-color: #d29922;
    --error-color: #f85149;
    --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --radius: 8px;
    --radius-lg: 12px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-color), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: all 0.2s ease;
}

.github-link:hover {
    color: var(--text-primary);
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

/* Main layout */
.main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    flex: 1;
    align-items: start;
}

/* Form section */
.form-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.form-section h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

input[type="text"],
input[type="number"],
select {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

/* Color input */
.color-input-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

input[type="color"] {
    width: 50px;
    height: 42px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-tertiary);
    cursor: pointer;
}

input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

/* Checkboxes */
.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    margin-bottom: 0;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    accent-color: var(--accent-color);
}

/* Multiline UI removed */

/* Preview section */
.preview-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.preview-section h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.preview-area {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 2rem;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.svg-container {
    width: 100%;
    text-align: center;
}

.placeholder {
    color: var(--text-muted);
    font-style: italic;
}

#preview-img {
    max-width: 100%;
    border-radius: var(--radius);
}

/* Output section */
.output-section h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
}

.code-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.85rem;
    font-weight: 500;
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.code-block {
    position: relative;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
}

.code-block pre {
    padding: 1rem;
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--text-primary);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

.copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.25rem 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.75rem;
    transition: all 0.2s ease;
}

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

.copy-btn.copied {
    background: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

/* Footer */
.footer {
    margin-top: 3rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer a {
    color: var(--accent-color);
    text-decoration: none;
}

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

/* Responsive design */
@media (max-width: 768px) {
    .main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .checkbox-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .form-section,
    .preview-section {
        padding: 1.5rem;
    }
}

/* Loading state */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Success/Error states */
.success {
    border-color: var(--success-color) !important;
    box-shadow: 0 0 0 3px rgba(63, 185, 80, 0.1) !important;
}

.error {
    border-color: var(--error-color) !important;
    box-shadow: 0 0 0 3px rgba(248, 81, 73, 0.1) !important;
}

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

.fade-in {
    animation: fadeIn 0.3s ease;
}