:root {
    --sb-thumb: rgba(0, 0, 0, 0.14);
    --sb-thumb-hover: rgba(0, 0, 0, 0.26);
    --sb-size: 8px;
    --sb-radius: 999px;
    --sb-border: 2px;
    --sb-transition: 160ms;
}

* {
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--sb-thumb) transparent;
    scrollbar-gutter: stable;
}

*::-webkit-scrollbar {
    width: var(--sb-size);
    height: var(--sb-size);
}
*::-webkit-scrollbar-track {
    background: transparent;
}
*::-webkit-scrollbar-thumb {
    background: var(--sb-thumb);
    border-radius: var(--sb-radius);
    min-height: 24px;
    border: var(--sb-border) solid transparent;
    background-clip: padding-box;
    transition: background var(--sb-transition);
}
*::-webkit-scrollbar-thumb:hover {
    background: var(--sb-thumb-hover);
}

*::-webkit-scrollbar-corner {
    background: transparent;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f5f5f5;
    font-size: 16px;
    height: 100vh;
    overflow: auto;
}

button {
    padding: 10px 15px;
    margin-right: 10px;
    background: #6366f1;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
    width: 100%;
}

button:hover {
    background: #4f46e5;
}

button.danger {
    background: #ef4444;
}

button.danger:hover {
    background: #dc2626;
}

button.small-btn {
    padding: 8px 12px;
    margin: 2px;
    font-size: 13px;
    display: inline-block;
}

.sidebar > button {
    margin: 0 0 15px 0;
    width: 100%;
}

button.small-btn {
    padding: 8px 12px;
    margin: 2px;
    font-size: 13px;
    display: inline;
    width: auto;
}

.workspace {
    display: flex;
    gap: 15px;
    padding: 15px;
    height: 100vh;
    width: 100%;
}

canvas {
    border: 1px solid #ccc;
    border-radius: 8px;
    background: linear-gradient(to bottom, #261f40 0%, #090217 100%);
    cursor: default;
    width: 100%;
    height: 100%;
}

.canvas-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 600px;
    min-height: 500px;
}

.sidebar {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    max-height: calc(100vh - 30px);
}

.transforms-section {
    width: 360px;
    flex-shrink: 0;
    overflow-y: auto;
    max-height: calc(100vh - 30px);
    padding-right: 5px;
}

.sidebar::-webkit-scrollbar,
.transforms-section::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track,
.transforms-section::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb,
.transforms-section::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb:hover,
.transforms-section::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.transforms-section h2 {
    margin-top: 0;
    font-size: 18px;
    color: #333;
}

.transform-controls {
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 12px;
}

.transform-controls p {
    margin: 0;
    font-weight: bold;
}

.transform-controls label {
    display: inline-block;
    margin: 10px 0;
    font-size: 13px;
}

.transform-controls button {
    margin-top: 8px;
    width: auto;
}

input[type="number"] {
    padding: 6px 8px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 13px;
    margin: 0 3px;
    width: 70px;
}

button:disabled,
input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.disabled-section {
    opacity: 0.6;
    position: relative;
}

.mode-section {
    margin-top: 15px;
    margin-right: 2px;
}

.mode-section p {
    margin: 0 0 8px 0;
}

.mode-section > :not(:first-child) {
    font-size: 13px;
}

.shape-btn,
.projection-btn {
    width: 100%;
    margin: 0 0 8px 0;
    padding: 10px;
    background: #e0e0e0;
    color: #333;
    text-align: center;
    font-size: 13px;
}

.shape-btn.active,
.projection-btn.active {
    background: #6366f1;
    color: white;
}

.shape-btn:hover,
.projection-btn:hover {
    background: #d0d0d0;
}

.shape-btn.active:hover,
.projection-btn.active:hover {
    background: #4f46e5;
}

.info-panel {
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 12px;
    font-size: 14px;
    margin-bottom: 15px;
}

.info-panel strong {
    display: block;
    margin-bottom: 8px;
}

#infoText p {
    margin: 5px 0;
}

.range-controls {
    background: #f5f5f5;
    padding: 8px;
    border-radius: 4px;
    margin-bottom: 8px;
}

.range-controls label {
    display: block;
    margin-bottom: 6px;
    font-size: 12px;
}

.range-controls input {
    margin: 0 2px;
}

.collapsible .collapsible-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    user-select: none;
}

.collapsible .collapsible-toggle .chev {
    width: 10px;
    height: 10px;
    display: inline-block;
    margin-left: 8px;
    transform-origin: center;
    border-right: 2px solid #777;
    border-bottom: 2px solid #777;
    transform: rotate(-45deg);
    transition:
        transform 260ms cubic-bezier(0.2, 0.8, 0.2, 1),
        border-color 180ms;
}

.collapsible.open .collapsible-toggle .chev {
    transform: rotate(45deg);

    border-color: #333;
}

.collapsible .collapsible-body {
    overflow: hidden;
    transition: height 260ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
    user-select: none;
}