:root {
    --bg-color: #0d0d12;
    --panel-left-bg: #14141c;
    --panel-right-bg: #000000;
    --accent-color: #00ffcc;
    --accent-glow: rgba(0, 255, 204, 0.4);
    --text-main: #ffffff;
    --text-dim: #8a8a9e;
    --ui-bg: rgba(20, 20, 28, 0.85);
    --ui-border: rgba(255, 255, 255, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
}

body,
html {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: #000;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-main);
}

/* App Container enforces 1920x1080 fixed aspect and size */
#app-container {
    position: absolute;
    width: 1920px;
    height: 1080px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    background-color: var(--bg-color);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8);
    /* Scale to fit window during dev, otherwise it's strictly 1920x1080 */
    /* Will implement scaling via JS if requested, but requirement says exact pixel mapping */
}

/* Left Panel: 960x1080 */
#left-panel {
    width: 960px;
    height: 1080px;
    position: relative;
    background-color: var(--panel-left-bg);
    border-right: 1px solid var(--ui-border);
}

/* Right Panel: 960x1080 */
#right-panel {
    width: 960px;
    height: 1080px;
    position: relative;
    background-color: var(--panel-right-bg);
}

/* Glassmorphic UI Overlay for Controls */
#ui-overlay {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 380px;
    background-color: var(--ui-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--ui-border);
    border-radius: 12px;
    padding: 24px;
    z-index: 10;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

#ui-overlay h1 {
    font-size: 24px;
    letter-spacing: 2px;
    margin-bottom: 24px;
    color: var(--accent-color);
    text-shadow: 0 0 10px var(--accent-glow);
    font-weight: 700;
}

.control-group {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.control-group:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.control-group h3 {
    font-size: 14px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.btn {
    display: inline-block;
    background: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-right: 8px;
}

.btn-small {
    padding: 4px 8px;
    font-size: 11px;
}

.btn:hover {
    background: var(--accent-color);
    color: #000;
    box-shadow: 0 0 15px var(--accent-glow);
}

#file-name {
    display: block;
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-dim);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.slider-row {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
}

.osc-row {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    font-size: 13px;
}

.osc-row label {
    display: flex;
    align-items: center;
    width: 45px;
    cursor: pointer;
}

.osc-row input[type="checkbox"] {
    margin-right: 6px;
    cursor: pointer;
}

.num-input {
    width: 45px;
    background: #1c1c24;
    border: 1px solid var(--ui-border);
    color: var(--text-main);
    padding: 2px 4px;
    border-radius: 3px;
    font-family: monospace;
    font-size: 12px;
}

.num-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.osc-row span {
    margin: 0 6px;
    color: var(--text-dim);
    font-size: 11px;
}

.slider-row label {
    width: 80px;
    font-size: 14px;
    color: var(--text-main);
}

input[type=range] {
    -webkit-appearance: none;
    flex: 1;
    background: transparent;
}

input[type=range]:focus {
    outline: none;
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    cursor: pointer;
    background: #2a2a35;
    border-radius: 3px;
    border: 1px solid rgba(0, 0, 0, 0.3);
}

input[type=range]::-webkit-slider-thumb {
    border: 2px solid var(--accent-color);
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: #000;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    margin-top: -6px;
    box-shadow: 0 0 10px var(--accent-glow);
}

input[type=range]:focus::-webkit-slider-thumb {
    background: var(--accent-color);
}

.val-readout {
    width: 60px;
    text-align: right;
    font-size: 13px;
    color: var(--accent-color);
    font-family: monospace;
}

input[type="color"] {
    -webkit-appearance: none;
    appearance: none;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 4px;
    cursor: pointer;
    background: transparent;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: 1px solid var(--ui-border);
    border-radius: 4px;
}

#visualizer-container {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

#slicer-canvas {
    width: 100%;
    height: 100%;
    display: block;
    background-color: var(--panel-right-bg);
}

/* Output Grid Overlay placed precisely at top-left */
#output-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 224px;
    /* 2 cols * 112px */
    height: 336px;
    /* 3 rows * 112px */
    display: grid;
    grid-template-columns: 112px 112px;
    grid-template-rows: 112px 112px 112px;
    pointer-events: none;
    /* Let clicks pass through */
    z-index: 10;
}

.grid-cell {
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-sizing: border-box;
    width: 112px;
    height: 112px;
}