:root {
    --bg-primary: #000000;
    --bg-secondary: #121212;
    --text-primary: #e0e0e0;
    --text-secondary: #888888;
    --accent: #3d9dff;
    --border-color: #2a2a2a;
    --shadow: rgba(61, 157, 255, 0.3);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    user-select: none;
}

#spaceCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
}

#toolbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 48px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 16px;
    z-index: 100;
    gap: 12px;
}

.tool-button {
    background: none;
    border: none;
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.tool-button:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.tool-button.active {
    color: var(--accent);
}

.tool-button svg {
    width: 24px;
    height: 24px;
}

.spawn-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.spawn-controls label {
    display: flex;
    align-items: center;
    gap: 8px;
}

.spawn-controls input[type="range"] {
    width: 100px;
}

.spawn-controls.hidden {
    display: none;
}

#sidebar {
    position: fixed;
    top: 48px;
    left: 0;
    width: 280px;
    height: calc(100vh - 48px);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 16px;
    overflow-y: auto;
    z-index: 90;
    transition: transform 0.3s ease-in-out;
}

#sidebar.hidden {
    transform: translateX(-100%);
}

#sidebar h2 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

#scenario-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.scenario-item {
    background-color: #000;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    aspect-ratio: 1 / 1;
    display: flex;
    flex-direction: column;
}

.scenario-item:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px var(--shadow);
    border-color: var(--accent);
}

.scenario-item.active {
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--shadow);
}

.scenario-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

#perfStats {
    position: fixed;
    top: 14px;
    right: 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    z-index: 110;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid var(--accent);
    text-align: center;
    max-width: 400px;
}

.modal.hidden {
    display: none;
}

/* Dropdown styling */
select#spawnType {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

select#spawnType:hover {
    border-color: var(--accent);
}

select#spawnType:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--shadow);
}

/* Custom dropdown arrow */
select#spawnType {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23e0e0e0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 16px;
    padding-right: 28px;
}

/* Range slider styling */
input[type="range"]#massSlider {
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

input[type="range"]#massSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease;
}

input[type="range"]#massSlider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type="range"]#massSlider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    transition: transform 0.2s ease;
}

input[type="range"]#massSlider::-moz-range-thumb:hover {
    transform: scale(1.2);
}

#massValue {
    color: var(--accent);
    font-weight: 600;
    min-width: 30px;
    text-align: center;
}

#radiusControls {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
    padding: 12px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

#radiusControls label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

#radiusSlider {
    width: 100%;
    margin: 4px 0;
}

#radiusValue {
    color: var(--accent);
    font-weight: 600;
}

.spawn-radius-circle {
    position: fixed;
    border: 2px dashed var(--accent);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0.7;
    z-index: 200;
    transition: all 0.2s ease;
}