.game-ui {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    max-width: 95vw;
    height: 600px;
    max-height: 90vh;
    background-color: var(--ui-bg);
    border: 2px solid var(--ui-border);
    border-radius: 8px;
    color: var(--ui-text);
    display: flex;
    flex-direction: column;
    pointer-events: auto;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

.building-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 15px;
    border-bottom: 1px solid var(--ui-border);
    flex-shrink: 0;
}

.building-header h2 {
    margin: 0;
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-right: 15px;
}

.tool-buttons {
    display: flex;
    gap: 5px;
    flex-grow: 1;
    justify-content: center;
}

.tool-button {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--ui-border);
    color: var(--ui-text-dim);
    padding: 5px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.tool-button:hover {
    background-color: rgba(168, 218, 220, 0.2);
    color: var(--ui-text);
}

.tool-button.active {
    background-color: var(--ui-highlight);
    border-color: var(--ui-highlight);
    color: var(--color-dark);
}

.close-button {
    background: none;
    border: none;
    color: var(--ui-text);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.close-button:hover {
    color: var(--ui-accent);
}

.building-content-grid {
    flex-grow: 1;
    display: flex;
    padding: 15px;
    gap: 15px;
    overflow: hidden;
}

#tool-info-area {
    flex: 0 0 200px;
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--ui-border);
    padding: 10px;
    border-radius: 4px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#tool-info-area h4 {
    font-size: 1.1rem;
    margin: 0 0 5px 0;
    border-bottom: 1px solid var(--ui-border);
    padding-bottom: 5px;
}

#vehicle-building-canvas-container {
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #111;
    border: 1px solid var(--ui-border);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

#vehicle-building-canvas {
    max-width: 100%;
    max-height: 100%;
    display: block;
    background-color: #2a2a2a;
}

.object-select-button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 8px;
    background-color: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--ui-border);
    border-radius: 4px;
    color: var(--ui-text);
    cursor: pointer;
    transition: background-color 0.2s;
}

.object-select-button .item-icon, .tile-select-button .item-icon {
    flex-shrink: 0;
    margin-right: 8px;
}

.object-select-button .item-name, .tile-select-button .item-name {
    flex-grow: 1;
    margin-right: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.object-cost {
    font-size: 0.8em;
    margin-left: auto;
    display: flex;
    gap: 4px;
    align-items: center;
    flex-shrink: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 80px;
}

.object-select-button:hover:not(:disabled) {
    background-color: rgba(168, 218, 220, 0.2);
    border-color: var(--ui-highlight);
}

.object-select-button.active {
    background-color: var(--ui-highlight);
    border-color: var(--ui-highlight);
    color: var(--color-dark);
}

.object-select-button:disabled, .tile-select-button:disabled, .object-select-button.cannot-afford {
    background-color: rgba(80, 80, 80, 0.5);
    color: var(--ui-text-dim);
    border-color: var(--ui-disabled);
    cursor: not-allowed;
}

.object-select-button.cannot-afford .object-cost {
    opacity: 0.7;
}

.inventory-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 15px;
    border-bottom: 1px solid var(--ui-border);
}

.inventory-tabs {
    display: flex;
    gap: 8px;
    padding: 8px;
}

.tab-button {
    padding: 6px 10px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--ui-border);
    border-radius: 4px;
    color: var(--ui-text);
    cursor: pointer;
}

.tab-button.active {
    background: var(--ui-highlight);
    color: var(--color-dark);
}

.inventory-content {
    flex-grow: 1;
    padding: 10px;
    overflow: auto;
}

.inventory-item {
    display: flex;
    align-items: center;
    padding: 8px;
    margin-bottom: 5px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.inventory-item:hover {
    background-color: rgba(0, 0, 0, 0.4);
}

.inventory-item.selected {
    background-color: rgba(168, 218, 220, 0.3);
    border: 1px solid var(--ui-highlight);
}

.item-icon {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    margin-right: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.item-details {
    flex-grow: 1;
}

.item-name {
    font-weight: bold;
    margin-bottom: 2px;
}

.empty-message {
    padding: 20px;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
}

.blueprints-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.equipment-slots {
    display: flex;
    justify-content: space-around;
    padding: 20px 0;
}

.equipment-slot {
    width: 100px;
    text-align: center;
}

.slot-content {
    width: 80px;
    height: 80px;
    border: 2px solid var(--ui-border);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: rgba(0, 0, 0, 0.3);
}

.slot-content.empty {
    color: rgba(255, 255, 255, 0.3);
}

.building-footer {
    padding: 8px 15px;
    border-top: 1px solid var(--ui-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.footer-info {
    font-size: 0.9rem;
    color: var(--ui-text-dim);
}

.action-buttons {
    display: flex;
    gap: 10px;
}

.action-buttons button {
    padding: 8px 15px;
    background-color: var(--ui-highlight);
    color: var(--color-dark);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    font-family: var(--font-main);
}

.action-buttons button:hover:not(:disabled) {
    background-color: var(--ui-accent);
    color: var(--color-dark);
}

.action-buttons button:disabled {
    background-color: var(--ui-disabled);
    color: var(--ui-text-dim);
    cursor: not-allowed;
}

.module-details {
    font-size: 0.9rem;
}

.module-details h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.module-details p {
    margin-bottom: 8px;
}

.hidden {
    display: none !important;
}