.bezier-editor-container {
    max-width: 850px;
    margin: 1rem auto;
    padding: 1.5rem 2rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color);
}

.bezier-editor-container h2 {
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 1.4rem;
    color: var(--text-color);
}
.bezier-editor-container .description {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--label-text);
}

.main-layout {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    align-items: flex-start;
}

.editor-panel, .output-preview-panel {
    flex: 1;
    background-color: var(--preview-bg);
    padding: 1.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.editor-panel h3, .output-preview-panel h3 {
    margin-top: 0;
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
    color: var(--label-text);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.canvas-wrapper {
    width: 100%;
    max-width: 300px;
    height: 300px;
    margin: 0 auto 1.5rem auto;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    position: relative;
    overflow: hidden;
}
#bezier-canvas {
    display: block;
    cursor: grab;
}
 #bezier-canvas:active {
    cursor: grabbing;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem 1rem;
    margin-bottom: 1.5rem;
}
.control-group label {
    display: block;
    margin-bottom: 0.3rem;
    font-weight: 500;
    color: var(--label-text);
    font-size: 0.85rem;
}
.control-group input[type="number"] {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.95rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    text-align: center;
    box-sizing: border-box;
    -moz-appearance: textfield;
}
.control-group input[type="number"]::-webkit-outer-spin-button,
.control-group input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none; margin: 0;
}
.control-group input:focus {
    border-color: var(--accent-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.2);
}
 body.dark-mode .control-group input:focus {
    box-shadow: 0 0 0 2px rgba(102, 191, 255, 0.25);
}

.presets {
    text-align: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--border-color);
}
.presets label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--label-text);
    font-size: 0.9rem;
}
.presets button {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    margin: 0.2rem;
    cursor: pointer;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.2s, border-color 0.2s;
}
.presets button:hover {
    border-color: var(--accent-color);
    background-color: var(--bg-color);
}
.presets button.active {
    background-color: var(--accent-color);
    color: var(--bg-color-light);
    border-color: var(--accent-color);
    font-weight: 500;
}
body.dark-mode .presets button.active {
     color: var(--bg-color-dark);
}

.output-group {
    margin-bottom: 1.5rem;
    position: relative;
}
.output-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    color: var(--label-text);
    font-size: 0.9rem;
}
.output-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
#css-output-value {
    flex-grow: 1;
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
    font-size: 0.95rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: auto;
}
#css-output-value[readonly] {
    background-color: var(--preview-bg);
    opacity: 0.9;
}
body.dark-mode #css-output-value[readonly] {
     background-color: var(--bg-color-dark);
}

.control-button.copy {
    flex-shrink: 0;
    padding: 0.5rem 0.6rem;
    background-color: var(--label-text);
    color: var(--bg-color);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.2s;
    opacity: 0.8;
    line-height: 0;
}
.control-button.copy:hover { opacity: 1; }

.copy-status-message {
    position: absolute;
    bottom: -20px;
    left: 0;
    font-size: 0.8rem;
    color: var(--accent-color);
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}
.copy-status-message.visible { opacity: 1; }

.preview-group {
    margin-top: 1rem;
}
.preview-group label {
     display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    color: var(--label-text);
    font-size: 0.9rem;
}
.animation-preview-container {
    width: 200px;
    height: 50px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 10px;
    box-sizing: border-box;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
#animation-preview-box {
    width: 30px;
    height: 30px;
    background-color: var(--accent-color);
    border-radius: 4px;
    display: block;
    position: relative;
}
body.dark-mode #animation-preview-box {
    background-color: var(--accent-color-dark);
}

@keyframes moveBox {
  0% { transform: translateX(200%); }
  100% { transform: translateX(-200%); }
}

.control-button.replay {
    margin-top: 0.5rem;
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    background-color: #6c757d;
    color: white;
    float: right;
}
 .control-button.replay:hover { opacity: 0.9; }

@media (max-width: 700px) {
    .main-layout { flex-direction: column; }
    .editor-panel, .output-preview-panel { min-width: 100%; }
    .editor-panel {
        flex: auto!important;
        width: 100%!important;
    }
    .canvas-wrapper { max-width: 100%; }
}