:root {
    --color-white: #ffffff;
    --color-black: #000000;
    --color-button-bg: #f0f0f0dd;
    --color-button-hover: #cccccc;
    --color-button-selected: #97d2ffdd;
    --color-button-selected-text: #1179c8;
    --color-button-danger: #f53c3cdd;
    --color-button-danger-hover: #e31111;
    --color-border: #888888dd;
    --color-bounds: #00000033;

    --color-proposition: #1179c8;
    --color-focus: #1179c888;

    --color-t1-a: #744a3a;
    --color-t1: #a26851;
    --color-t1-d: #5f3d30;
    --color-t2-a: #b3926f;
    --color-t2: #bfa386;
    --color-t2-d: #9d7953;
    --color-t3-a: #939393;
    --color-t3: #c4c4c4;
    --color-t3-d: #616161;

    --color-shade: #00000055;
    --color-light: #ffffff55;
    --color-energy: #e9f02588;
    --color-heater: #f0252588;
    --color-ammo: #45302488;
    --color-water: #2580f088;
    --color-med: #006e2688;

    --color-green: #3cf58088;
    --color-red: #f53c3c88;
}

body,
html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: sans-serif;
    background-color: var(--color-black);
}

#top-canvas,
#bottom-canvas {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
}

#bottom-canvas {
    z-index: 1;
}

#top-canvas {
    z-index: 2;
}

#top-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-button-bg);
    padding: 8px 16px;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 10;
    border-bottom: 1px solid var(--color-border);
    font-size: 14px;
}

.radio-group,
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-bar-button {
    width: 30px;
    height: 30px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    background-color: var(--color-button-bg);
    color: var(--color-black);
    font-family: sans-serif;
    font-size: 14px;
    text-align: center;
    user-select: none;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

.top-bar-button:hover {
    background-color: var(--color-button-hover);
}

.radio-group input[type="radio"],
.checkbox-group input[type="checkbox"] {
    display: none;
}

.radio-group input[type="radio"]:checked + .top-bar-button {
    background-color: var(--color-proposition);
    color: var(--color-white);
    border-color: var(--color-border);
}

.checkbox-visual {
    padding: 0;
}

.checkbox-group input[type="checkbox"]:checked + .checkbox-visual::before {
    content: "☑️";
    font-size: 20px;
    line-height: 1;
}

.top-bar-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tooltip-container {
    display: flex;
    position: relative;
    gap: 8px;
    font-size: 14px;
    align-items: center;
}

.tooltip-trigger {
    font-weight: bold;
    font-size: 18px;
}

.tooltip-content {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    padding: 8px;
    width: max-content;
    max-width: 600px;
    z-index: 20;
    pointer-events: none;
    text-align: left;
    line-height: 1.5;
}

.tooltip-container:hover .tooltip-content {
    display: block;
}

#ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

.ui-panel {
    background: var(--color-button-bg);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 14px;
    color: var(--color-black);
    box-shadow: 0 2px 5px var(--color-bounds);
}

.stats-panel {
    position: absolute;
    padding: 8px;
    box-sizing: border-box;
    pointer-events: none;
}

.overlay-action-button {
    position: absolute;
    width: 30px;
    height: 30px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    transition: background-color 0.2s;
    pointer-events: all;
    background-color: var(--color-button-bg);
}

.overlay-action-button:hover {
    background-color: var(--color-button-hover);
}

.overlay-action-button[disabled] {
    cursor: not-allowed;
    opacity: 0.5;
}

.overlay-action-button[disabled]:hover {
    background-color: var(--color-button-bg);
}

.overlay-action-button.btn-danger[disabled]:hover {
    background-color: var(--color-button-danger);
}

.btn-danger {
    background-color: var(--color-button-danger);
    border-color: var(--color-button-danger);
    color: var(--color-white);
}

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

.context-menu {
    position: absolute;
    padding: 4px 0;
    min-width: 150px;
    pointer-events: all;
    z-index: 1000;
}

.context-menu hr {
    margin: 4px 8px;
    border: none;
    border-top: 1px solid var(--color-border);
}

.context-menu-item {
    padding: 8px 20px 8px 24px;
    cursor: pointer;
    position: relative;
    white-space: nowrap;
}

.context-menu-item.selected {
    background-color: var(--color-button-selected);
}

.context-menu-item.selected::before {
    content: "✓";
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-button-selected-text);
    font-size: 12px;
}

.context-menu-item:not([disabled]):hover {
    background-color: var(--color-button-hover);
}

.context-menu-item[disabled] {
    color: var(--color-border);
    cursor: not-allowed;
}

.context-menu-item.has-submenu::after {
    content: "▶";
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
    color: var(--color-black);
}

.submenu {
    display: none;
    position: fixed;
    padding: 4px 0;
    z-index: 1001;
    max-height: calc(100vh - 20px);
    overflow-y: auto;
}