:root {
    --bg-color: #1e1e1e;
    --text-color: #e0e0e0;
    --accent-color: #4a90e2;
    --accent-hover: #357abd;
    --toolbar-bg: #2d2d2d;
    --border-color: #444;
    --input-bg: #3d3d3d;

    /* Canvas & Sim Monochromatic */
    --canvas-state-fill: #1e1e1e;
    --canvas-state-stroke: #e0e0e0;
    --canvas-selected: #4a90e2;
    --canvas-active: #4d4d4d;
    --canvas-start: #333333;
    --canvas-handle: #666;
    --syntax-cond: #aaaaaa;
    --syntax-func: #cccccc;
}

body.light-theme {
    --bg-color: #ffffff;
    --text-color: #111111;
    --accent-color: #444444;
    --accent-hover: #222222;
    --toolbar-bg: #f0f0f0;
    --border-color: #cccccc;
    --input-bg: #ffffff;

    /* Canvas & Sim Monochromatic */
    --canvas-state-fill: #ffffff;
    --canvas-state-stroke: #111111;
    --canvas-selected: #444444;
    --canvas-active: #d8d8d8;
    --canvas-start: #eeeeee;
    --canvas-handle: #888;
    --syntax-cond: #555555;
    --syntax-func: #777777;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
    /* Canvas takes full screen */
}

#toolbar {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: var(--toolbar-bg);
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    z-index: 10;
    border: 1px solid var(--border-color);
    max-width: 300px;
}

#codePanel {
    position: absolute;
    top: auto;
    left: 10px;
    /* top will be set dynamically by JS to sit right below #toolbar */
    width: 300px;
    max-height: 320px;
    z-index: 10;
}

#codeOutput {
    background: #000;
    color: #eee;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.75rem;
    padding: 8px;
    border-radius: 4px;
    overflow-y: auto;
    flex-grow: 1;
    min-height: 80px;
    line-height: 1.5;
    white-space: pre;
    margin: 0;
}

.panel-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 4px;
}

.panel-header-row .panel-header {
    margin: 0;
    border: none;
    padding: 0;
}

.btn-small {
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 4px;
}

#toolbar h1 {
    font-size: 1.2rem;
    margin: 0 0 10px 0;
    color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 5px;
}

.btn-section {
    margin-bottom: 10px;
}

.btn-section-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-color);
    opacity: 0.45;
    margin-bottom: 5px;
    padding-left: 2px;
}

.btn-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5px;
}

.btn-full {
    grid-column: 1 / -1;
}

button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 6px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.82rem;
    transition: background-color 0.2s;
    text-align: center;
}

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

button:disabled {
    background-color: #555;
    cursor: not-allowed;
    opacity: 0.7;
}

input[type="text"] {
    background-color: #3d3d3d;
    border: 1px solid var(--border-color);
    color: white;
    padding: 6px;
    border-radius: 4px;
}

.instructions {
    font-size: 0.85rem;
    color: #aaa;
}

.instructions p {
    margin: 4px 0;
}

#canvas-container {
    width: 100vw;
    height: 100vh;
}

#sidebar-right {
    position: absolute;
    top: 10px;
    right: 10px;
    bottom: 10px;
    width: 240px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: auto;
    z-index: 100;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 5px;
    /* space for scrollbar */
}

.panel {
    background-color: var(--toolbar-bg);
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    width: 100%;
    transition: opacity 0.3s ease;
    pointer-events: auto;
    position: relative;
    /* Flex containment for internal overflow control */
    display: flex;
    flex-direction: column;
    overflow: hidden;
    /* Prevent shrinking when sidebar is full */
    flex-shrink: 0;
}

.u-hidden {
    display: none !important;
}

.u-margin-b-15 {
    margin-bottom: 15px;
}

.panel-header {
    font-size: 0.9rem;
    margin: 0 0 8px 0;
    color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 4px;
}

/* Properties Panel is positioned by its parent #sidebar-right */

#propertiesPanel h3 {
    font-size: 0.9rem;
    margin: 0 0 8px 0;
    color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 4px;
}

.prop-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.prop-group label {
    font-size: 0.8rem;
    color: #999;
}

.prop-group input,
.prop-group textarea {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 6px;
    border-radius: 4px;
    font-size: 0.85rem;
    outline: none;
    font-family: inherit;
}

.prop-group textarea {
    resize: vertical;
    min-height: 60px;
}

.prop-group input:focus,
.prop-group textarea:focus {
    border-color: var(--accent-color);
}

.hidden {
    display: none;
}

#noSelectionMsg {
    font-size: 0.85rem;
    color: #666;
    font-style: italic;
    text-align: center;
    padding: 10px 0;
}

canvas {
    display: block;
    cursor: crosshair;
}

/* Simulation Panel specific styles */
#simPanel {
    max-height: 400px;
    overflow-y: auto;
}

.sim-buttons-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 5px;
    margin-top: 5px;
}

.sim-active-display {
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--text-color);
    opacity: 0.5;
}

.sim-active-display.is-simulating {
    color: var(--accent-color);
    opacity: 1;
}

.sim-section-label {
    font-size: 0.9rem;
    margin-bottom: 5px;
    color: #999;
}

.sim-btn-full {
    width: 100%;
    margin-bottom: 10px;
}

.sim-event-btn {
    font-size: 0.75rem;
    padding: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    transition: background-color 0.1s, transform 0.05s;
}

.sim-event-btn:hover {
    background-color: var(--accent-color);
    color: white;
}

.sim-event-btn:active {
    background-color: #357abd;
    transform: scale(0.95);
}

.var-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 5px;
    font-size: 0.85rem;
}

.var-label {
    min-width: 60px;
}

.var-input {
    width: 60px;
    padding: 2px 5px;
}

.alert-panel-neutral {
    border-color: var(--border-color);
}

.alert-header-neutral {
    color: var(--text-color);
    margin-bottom: 8px;
}

.alert-list {
    font-size: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#alertPanel h3 {
    font-size: 0.85rem;
    margin: 0 0 6px 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 4px;
}

.alert-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 6px;
    border-radius: 4px;
    margin-bottom: 5px;
}

.alert-item.error {
    background: rgba(100, 100, 100, 0.1);
    border-left: 3px solid #666;
}

.alert-item.warning {
    background: rgba(150, 150, 150, 0.1);
    border-left: 3px solid #999;
}

.alert-icon {
    font-size: 1rem;
}

.alert-text {
    line-height: 1.2;
}

.alert-item.error strong {
    color: var(--text-color);
}

.alert-item.warning strong {
    color: var(--text-color);
}

#consolePanel {
    /* Adjusted to be part of sidebar flow */
    width: 100%;
    max-height: 250px;
    z-index: 101;
    flex-shrink: 0;
}

#consoleLog {
    background: #000;
    color: #eee;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.8rem;
    padding: 8px;
    border-radius: 4px;
    overflow-y: auto;
    flex-grow: 1;
    min-height: 100px;
    line-height: 1.4;
    /* Ensure it doesn't push the panel height */
    max-height: 100%;
}

.console-line-event {
    opacity: 0.7;
}

.console-line-error {
    font-weight: bold;
}

#consoleLog div {
    border-bottom: 1px solid #222;
    padding: 2px 0;
}

#consoleLog div::before {
    content: "> ";
    color: #fff;
    opacity: 0.5;
}