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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    overflow: hidden;
    background: #1a1a1a;
}

#renderCanvas {
    width: 100%;
    height: 100vh;
    display: block;
    touch-action: none;
}

.controls {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.8);
    padding: 20px;
    border-radius: 10px;
    color: white;
    max-width: 350px;
    max-height: 90vh;
    overflow-y: auto;
}

.idle-controls {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    padding: 20px;
    border-radius: 10px;
    color: white;
    width: 320px;
    max-height: 90vh;
    overflow-y: auto;
}

.collapsible-panel {
    z-index: 900;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    position: sticky;
    top: 0;
    background: rgba(0, 0, 0, 0.9);
    padding-bottom: 10px;
    z-index: 1;
}

.panel-toggle {
    width: auto;
    min-width: 70px;
    padding: 6px 10px;
    margin-top: 0;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
}

.panel-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.panel-body {
    transition: max-height 0.3s ease;
}

.panel-body.collapsed {
    display: none;
}

.panel-collapsed {
    background: rgba(0, 0, 0, 0.7);
}

.controls h2,
.idle-controls h2 {
    margin: 0;
    font-size: 18px;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 12px;
    color: #aaa;
}

.toggle-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 0;
    color: #ddd;
}

.toggle-group input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin: 0;
    cursor: pointer;
}

input[type="text"],
textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid #444;
    border-radius: 4px;
    background: #2a2a2a;
    color: white;
    font-size: 12px;
}

textarea {
    resize: vertical;
    min-height: 60px;
}

button {
    width: 100%;
    padding: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    margin-top: 10px;
}

button:hover {
    opacity: 0.9;
}

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

.status {
    margin-top: 10px;
    padding: 10px;
    border-radius: 4px;
    font-size: 12px;
    display: none;
}

.status.show {
    display: block;
}

.status.success {
    background: rgba(76, 175, 80, 0.2);
    color: #4caf50;
}

.status.error {
    background: rgba(244, 67, 54, 0.2);
    color: #f44336;
}

.status.info {
    background: rgba(33, 150, 243, 0.2);
    color: #2196f3;
}

.checkbox-group {
    margin-bottom: 20px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 10px;
    width: 100%;
}

.checkbox-group > label {
    margin-bottom: 0;
}

.checkbox-group label > span {
    flex: 1;
    color: white;
    display: inline-block;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    cursor: pointer;
    flex-shrink: 0;
}

.collapse-btn {
    margin-right: 10px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #aaa;
    cursor: pointer;
    font-size: 14px;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.3s ease;
    transform-origin: center;
    user-select: none;
    flex-shrink: 0;
    width: 32px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.collapse-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.collapse-btn.collapsed {
    transform: rotate(-90deg);
}

.param-group {
    margin-top: 10px;
    padding-left: 28px;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.param-group.collapsed {
    max-height: 0 !important;
    margin-top: 0;
}

.param-item {
    margin-bottom: 10px;
}

.param-item label {
    display: block;
    font-size: 11px;
    color: #aaa;
    margin-bottom: 3px;
}

.param-item input[type="range"] {
    width: 100%;
    cursor: pointer;
}

.param-value {
    display: inline-block;
    min-width: 50px;
    text-align: right;
    font-size: 11px;
    color: #4caf50;
}

.expression-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
}

.expression-item {
    display: flex;
    align-items: center;
    font-size: 12px;
    gap: 8px;
}

.expression-item input[type="checkbox"] {
    width: 14px;
    height: 14px;
    margin: 0;
    flex-shrink: 0;
}

.expression-item label {
    flex: 1;
    margin: 0;
    cursor: pointer;
    font-size: 12px;
}

.expression-item input[type="number"] {
    width: 50px;
    padding: 2px 4px;
    border: 1px solid #444;
    border-radius: 3px;
    background: #2a2a2a;
    color: white;
    font-size: 11px;
    text-align: center;
}

.expression-item .duration-label {
    font-size: 10px;
    color: #888;
    white-space: nowrap;
}

@media (max-width: 900px) {
    .controls,
    .idle-controls {
        position: fixed;
        left: 12px;
        right: 12px;
        width: auto;
        max-width: none;
        padding: 14px;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    }

    .controls {
        top: 12px;
    }

    .idle-controls {
        top: auto;
        bottom: 12px;
    }

    .panel-header {
        position: relative;
    }

    button {
        font-size: 13px;
    }
}