:root {
    --bg-primary: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #333333;
    --text-primary: #cccccc;
    --text-secondary: #858585;
    --accent-color: #0e639c;
    --accent-hover: #1177bb;
    --brand-color: #512BD4;
    --brand-hover: #6338e0;
    --border-color: #454545;
    --success-color: #4ec9b0;
    --warning-color: #cca700;
    --error-color: #f48771;
    --terminal-bg: #1e1e1e;
    --header-height: 60px;
    --footer-height: 30px;
}

body, html {
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden; /* Prevent body scroll, use internal scrolling */
}

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

/* Header */
.app-header {
    height: var(--header-height);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 20px;
    justify-content: space-between;
}

.app-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.app-title i {
    color: var(--brand-color);
}

.worker-status {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 15px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 5px;
}

.status-dot.ready { background-color: #4ade80; box-shadow: 0 0 5px #4ade80; }
.status-dot.busy { background-color: var(--warning-color); }

/* Main Content */
.app-main {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.editor-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    min-width: 300px;
}

.output-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--terminal-bg);
    min-width: 300px;
}

/* Responsive Layout */
@media (max-width: 768px) {
    .app-main {
        flex-direction: column;
    }

    .editor-pane {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        min-width: 0;
    }

    .output-pane {
        min-width: 0;
    }
}

/* Toolbar */
.pane-toolbar {
    height: 40px;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    padding: 0 15px;
    border-bottom: 1px solid var(--border-color);
    justify-content: space-between;
}

.toolbar-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-secondary);
}

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

.btn-icon {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 5px;
    border-radius: 4px;
    transition: background 0.2s;
}

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

.btn-primary-custom {
    background-color: var(--brand-color); /* .NET Blue/Purple */
    color: white;
    border: none;
    padding: 5px 15px;
    border-radius: 2px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: background 0.2s;
}

.btn-primary-custom:hover {
    background-color: var(--brand-hover);
}

.btn-primary-custom:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Editor */
#monaco-editor {
    flex: 1;
    width: 100%;
}

/* Output */
.output-content {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    font-family: 'Consolas', 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    line-height: 1.5;
}

.output-line {
    margin-bottom: 4px;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.log-stdout { color: var(--text-primary); }
.log-stderr { color: var(--error-color); }
.log-result { color: #569cd6; font-weight: bold; } /* Blue for result */
.log-error { color: var(--error-color); background: rgba(244, 135, 113, 0.1); padding: 5px; border-left: 3px solid var(--error-color); }
.log-compiler-error { color: var(--warning-color); background: rgba(204, 167, 0, 0.1); padding: 5px; border-left: 3px solid var(--warning-color); }
.log-system { color: var(--text-secondary); font-style: italic; border-top: 1px solid var(--border-color); margin-top: 10px; padding-top: 5px; }

/* Footer */
.app-footer {
    height: var(--footer-height);
    background-color: var(--accent-color);
    color: white;
    display: flex;
    align-items: center;
    padding: 0 15px;
    font-size: 0.8rem;
    justify-content: space-between;
}

.footer-link {
    color: white;
    text-decoration: none;
    opacity: 0.8;
}

.footer-link:hover {
    opacity: 1;
    text-decoration: underline;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Loading Spinner */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(0,0,0,0.3);
    border-radius: 50%;
    border-top-color: #000;
    animation: spin 1s ease-in-out infinite;
}

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