body, html {
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: #1a1a2e;
    color: #e0e0e0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 13px;
    overflow: hidden;
}

#main-container {
    display: flex;
    height: 100%;
    padding: 20px;
    gap: 20px;
    box-sizing: border-box;
}

#main-content {
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #0f0f1e;
    position: relative;
    border-radius: 4px;
}

#animation-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

#animation-canvas {
    background-color: #000000;
    border: 1px solid #2a2a3e;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    transition: background-color 0.2s;
    display: block;
}

#animation-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
    max-width: 600px;
}

.play-pause-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: #2a2a3e;
    border: 2px solid #4a9eff;
    color: #4a9eff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    padding: 0;
}

.play-pause-btn:hover {
    background-color: #3a3a4e;
    border-color: #6ab4ff;
    color: #6ab4ff;
}

.play-pause-btn svg {
    display: block;
}

#progress-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

#progress-bar {
    width: 100%;
    height: 6px;
    background-color: #2a2a3e;
    border-radius: 3px;
    position: relative;
    cursor: pointer;
}

#progress-fill {
    height: 100%;
    background-color: #4a9eff;
    border-radius: 3px;
    width: 0%;
}

#progress-marker {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background-color: #ffffff;
    border-radius: 50%;
    border: 2px solid #4a9eff;
    left: 0%;
}

#time-display {
    font-size: 12px;
    color: #c0c0d0;
    font-variant-numeric: tabular-nums;
}

#sidebar {
    width: 500px;
    background-color: #16213e;
    padding: 16px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 16px;
    border: 1px solid #2a2a3e;
    border-radius: 4px;
    overflow-y: auto;
}

.section {
    border-bottom: 1px solid #2a2a3e;
    padding-bottom: 16px;
    margin-bottom: 16px;
}

.section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.section h2 {
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 12px;
    font-weight: 600;
    color: #a0a0b0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.subsection {
    margin-bottom: 12px;
}

.subsection:last-child {
    margin-bottom: 0;
}

.controls-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
}

#pattern-controls {
    overflow-y: auto;
    max-height: calc(100vh - 350px);
}

#pattern-controls .controls-grid {
    container-type: inline-size;
}

@container (max-width: 450px) {
    .controls-grid {
        grid-template-columns: 1fr;
    }
}

.subsection h3 {
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 11px;
    font-weight: 600;
    color: #b0b0c0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 8px;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group label {
    font-weight: 500;
    color: #c0c0d0;
    font-size: 11px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: #4a9eff;
}

.slider-input-group {
    display: flex;
    gap: 6px;
    align-items: center;
}

.slider-input-group input[type="range"] {
    flex: 1;
    height: 6px;
    background: #2a2a3e;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.slider-input-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: #4a9eff;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
}

.slider-input-group input[type="range"]::-webkit-slider-thumb:hover {
    background: #6ab4ff;
}

.slider-input-group input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: #4a9eff;
    border-radius: 50%;
    cursor: pointer;
    border: none;
    transition: background 0.2s;
}

.slider-input-group input[type="range"]::-moz-range-thumb:hover {
    background: #6ab4ff;
}

.slider-input-group input[type="number"] {
    width: 35px;
    padding: 4px 2px;
    background-color: #2a2a3e;
    color: #e0e0e0;
    border: 1px solid #3a3a4e;
    border-radius: 3px;
    font-size: 11px;
    outline: none;
    text-align: center;
}

.slider-input-group input[type="number"]:focus {
    border-color: #4a9eff;
}

.slider-input-group input[type="number"]::-webkit-inner-spin-button,
.slider-input-group input[type="number"]::-webkit-outer-spin-button {
    opacity: 1;
}

select {
    width: 100%;
    padding: 6px 10px;
    background-color: #2a2a3e;
    color: #e0e0e0;
    border: 1px solid #3a3a4e;
    border-radius: 3px;
    font-size: 12px;
    outline: none;
    cursor: pointer;
}

select:focus {
    border-color: #4a9eff;
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

button {
    width: 100%;
    padding: 8px;
    background-color: #2a2a3e;
    color: #e0e0e0;
    border: 1px solid #3a3a4e;
    border-radius: 3px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

button:hover {
    background-color: #3a3a4e;
    border-color: #4a9eff;
}

button:active {
    background-color: #1a1a2e;
}

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

.layer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 8px;
}

.layer-btn {
    padding: 12px 8px;
    background-color: #2a2a3e;
    color: #c0c0d0;
    border: 2px solid #3a3a4e;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.layer-btn:hover {
    background-color: #3a3a4e;
    border-color: #5a5a6e;
}

.layer-btn.active {
    background-color: #2a4a6e;
    border-color: #4a9eff;
    color: #ffffff;
    box-shadow: 0 0 8px rgba(74, 158, 255, 0.3);
}

#status {
    margin-top: auto;
    padding-top: 16px;
    font-size: 11px;
    color: #808090;
    text-align: right;
    font-style: italic;
}