/* Main Layout and Theme */

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

:root {
    /* Colors */
    --bg-primary: #1e1e1e;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #252526;
    --border-color: #404040;
    --text-primary: #d4d4d4;
    --text-secondary: #858585;
    --accent-primary: #4ec9b0;
    --accent-secondary: #0e639c;
    --accent-hover: #1177bb;
    --error-bg: #3c1f1f;
    --error-border: #f48771;
    --error-text: #f48771;
    --success-text: #4ec9b0;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Fonts */
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
    --font-sans: 'Segoe UI', 'San Francisco', 'Helvetica Neue', sans-serif;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
header {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.header-left {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-md);
}

h1 {
    color: var(--accent-primary);
    font-size: 1.5rem;
    font-weight: 600;
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-style: italic;
}

.controls {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

/* Buttons */
button {
    background-color: var(--accent-secondary);
    color: var(--text-primary);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background-color 0.2s;
}

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

button:active {
    transform: translateY(1px);
}

.btn-primary {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    font-weight: 600;
}

.btn-primary:hover {
    background-color: #5dd4b6;
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
}

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

.icon-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 1rem;
    background: transparent;
    border: 1px solid transparent;
}

.icon-btn:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
}

/* Select */
select {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 4px;
    font-size: 0.875rem;
    cursor: pointer;
}

select:focus {
    outline: 1px solid var(--accent-primary);
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    cursor: pointer;
    user-select: none;
}

input[type="checkbox"] {
    cursor: pointer;
}

/* Main Content */
main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    flex: 1;
    padding: var(--spacing-md);
    overflow: hidden;
}

.editor-panel,
.output-panel {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.panel-header {
    background-color: var(--bg-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h2 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.panel-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* Footer */
footer {
    background-color: var(--bg-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.footer-right {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

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

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    animation: fadeIn 0.2s;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    animation: slideIn 0.2s;
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

.modal-header h2 {
    font-size: 1.25rem;
    color: var(--text-primary);
}

.modal-close {
    background: transparent;
    font-size: 1.5rem;
    padding: 0;
    width: 2rem;
    height: 2rem;
    border-radius: 4px;
}

.modal-body {
    padding: var(--spacing-md);
    overflow-y: auto;
}

.modal-body h3 {
    color: var(--accent-primary);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.modal-body h3:first-child {
    margin-top: 0;
}

.modal-body ul {
    list-style: none;
    padding-left: 0;
}

.modal-body li {
    padding: var(--spacing-xs) 0;
}

.modal-body code {
    background-color: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.modal-body kbd {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 2px 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.modal-body pre {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: var(--spacing-md);
    overflow-x: auto;
    margin-top: var(--spacing-sm);
}

.modal-body pre code {
    background: none;
    padding: 0;
}

/* Responsive */
@media (max-width: 1024px) {
    main {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: stretch;
    }

    .header-left {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .controls {
        justify-content: stretch;
    }

    .controls > * {
        flex: 1;
    }
}