:root {
    --gb-darkest: #0f380f;
    --gb-dark: #306230;
    --gb-light: #8bac0f;
    --gb-lightest: #9bbc0f;
    --shell-color: #bbc68e;
    --shell-dark: #8a956a;
    --shell-highlight: #d0d8a8;
    --bg: #0a1f0a;
}

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

body {
    background: var(--bg);
    color: var(--gb-lightest);
    font-family: 'Press Start 2P', monospace;
    min-height: 100vh;
    overflow-x: hidden;
}

#scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.08) 2px,
        rgba(0, 0, 0, 0.08) 4px
    );
}

#app {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 16px;
}

header {
    text-align: center;
    padding: 30px 0 20px;
}

header h1 {
    font-size: clamp(14px, 4vw, 28px);
    color: var(--gb-lightest);
    text-shadow: 3px 3px 0 var(--gb-darkest), 1px 1px 0 var(--gb-dark);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.subtitle {
    font-size: clamp(8px, 2vw, 11px);
    color: var(--gb-light);
    opacity: 0.8;
}

.screen-bezel {
    background: var(--shell-color);
    border-radius: 12px;
    padding: 8px;
    border: 3px solid var(--shell-dark);
    box-shadow: inset 2px 2px 0 var(--shell-highlight), inset -2px -2px 0 rgba(0,0,0,0.2), 0 4px 20px rgba(0,0,0,0.5);
    position: relative;
}

.screen-bezel.small {
    border-radius: 8px;
    padding: 6px;
    border-width: 2px;
}

.bezel-text {
    text-align: center;
    font-size: 6px;
    color: var(--shell-dark);
    letter-spacing: 2px;
    padding: 4px 0 6px;
    text-transform: uppercase;
}

.screen-inner {
    background: var(--gb-darkest);
    border-radius: 8px;
    padding: 10px;
    min-height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: inset 3px 3px 8px rgba(0,0,0,0.6);
}

.screen-bezel.small .screen-inner {
    min-height: auto;
    border-radius: 4px;
    padding: 4px;
}

#upload-zone {
    cursor: pointer;
    margin: 20px auto;
    max-width: 600px;
    outline: none;
    transition: transform 0.2s;
}

#upload-zone:hover, #upload-zone:focus {
    transform: scale(1.01);
}

#upload-zone.dragover .screen-inner {
    background: var(--gb-dark);
}

#upload-prompt {
    font-size: clamp(10px, 2.5vw, 14px);
    color: var(--gb-light);
    text-align: center;
    padding: 40px 20px;
}

.pulsing {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Controls */
#controls {
    margin: 24px auto;
    max-width: 700px;
    background: linear-gradient(180deg, #1a3a1a 0%, #0f2a0f 100%);
    border: 2px solid var(--gb-dark);
    border-radius: 10px;
    padding: 20px;
}

.control-group {
    margin-bottom: 16px;
}

.control-group label {
    display: block;
    font-size: 8px;
    color: var(--gb-light);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.gb-btn {
    font-family: 'Press Start 2P', monospace;
    font-size: 7px;
    padding: 8px 12px;
    background: var(--gb-darkest);
    color: var(--gb-light);
    border: 2px solid var(--gb-dark);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
    box-shadow: 0 3px 0 #000, inset 0 1px 0 rgba(139,172,15,0.1);
    position: relative;
    top: 0;
}

.gb-btn:hover {
    background: var(--gb-dark);
    color: var(--gb-lightest);
}

.gb-btn:active, .gb-btn.active {
    background: var(--gb-dark);
    color: var(--gb-lightest);
    box-shadow: 0 1px 0 #000, inset 0 1px 0 rgba(139,172,15,0.2);
    top: 2px;
    border-color: var(--gb-light);
}

.slider-group label span {
    color: var(--gb-lightest);
}

.gb-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: var(--gb-darkest);
    border: 2px solid var(--gb-dark);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
}

.gb-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--gb-light);
    border: 2px solid var(--gb-darkest);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.gb-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--gb-light);
    border: 2px solid var(--gb-darkest);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

#custom-palette {
    margin-bottom: 16px;
}

#custom-palette label {
    display: block;
    font-size: 8px;
    color: var(--gb-light);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.color-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.color-row input[type="color"] {
    width: 36px;
    height: 36px;
    border: 2px solid var(--gb-dark);
    border-radius: 4px;
    background: none;
    cursor: pointer;
    padding: 0;
}

.color-row span {
    font-size: 6px;
    color: var(--gb-light);
    margin-right: 8px;
}

/* Output */
#output-area {
    margin: 24px auto;
    max-width: 700px;
}

#preview-container {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.preview-frame {
    flex: 1;
    min-width: 200px;
    max-width: 340px;
}

.frame-label {
    font-size: 8px;
    text-align: center;
    color: var(--gb-light);
    margin-bottom: 6px;
    letter-spacing: 2px;
}

.preview-frame canvas {
    width: 100%;
    height: auto;
    display: block;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

#export-controls {
    margin-top: 20px;
    text-align: center;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.dimension-badge {
    font-size: 8px;
    background: var(--gb-darkest);
    border: 2px solid var(--gb-dark);
    padding: 6px 12px;
    border-radius: 20px;
    color: var(--gb-light);
    letter-spacing: 1px;
}

.export-buttons {
    display: flex;
    gap: 10px;
}

.gb-action-btn {
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    padding: 12px 20px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.15s;
    letter-spacing: 1px;
    position: relative;
    top: 0;
}

.a-btn {
    background: linear-gradient(180deg, #6d2c7b 0%, #4a1a55 100%);
    color: #e8c8f0;
    box-shadow: 0 4px 0 #2a0e33, 0 6px 12px rgba(0,0,0,0.4), inset 0 2px 0 rgba(255,255,255,0.15);
}

.a-btn:hover {
    background: linear-gradient(180deg, #8040a0 0%, #5a2268 100%);
}

.a-btn:active {
    top: 3px;
    box-shadow: 0 1px 0 #2a0e33, inset 0 2px 0 rgba(255,255,255,0.1);
}

.b-btn {
    background: linear-gradient(180deg, #6d2c7b 0%, #4a1a55 100%);
    color: #e8c8f0;
    box-shadow: 0 4px 0 #2a0e33, 0 6px 12px rgba(0,0,0,0.4), inset 0 2px 0 rgba(255,255,255,0.15);
}

.b-btn:hover {
    background: linear-gradient(180deg, #8040a0 0%, #5a2268 100%);
}

.b-btn:active {
    top: 3px;
    box-shadow: 0 1px 0 #2a0e33, inset 0 2px 0 rgba(255,255,255,0.1);
}

.scale-btn {
    padding: 6px 10px;
    font-size: 7px;
}

/* Processing overlay */
.processing-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gb-darkest);
    z-index: 10;
    overflow: hidden;
}

.scanline-sweep {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gb-light);
    opacity: 0.6;
    animation: sweep 0.4s linear;
}

@keyframes sweep {
    0% { top: 0; }
    100% { top: 100%; }
}

footer {
    text-align: center;
    padding: 30px 10px 20px;
    font-size: 6px;
    color: var(--gb-dark);
    line-height: 2.2;
}

footer a {
    color: var(--gb-light);
    text-decoration: none;
    border-bottom: 1px solid var(--gb-dark);
    transition: color 0.2s;
}

footer a:hover {
    color: var(--gb-lightest);
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--gb-dark);
    color: var(--gb-lightest);
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    border: 2px solid var(--gb-light);
    z-index: 10000;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 600px) {
    #preview-container {
        flex-direction: column;
        align-items: center;
    }
    
    .preview-frame {
        max-width: 100%;
        width: 100%;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .gb-btn {
        width: 100%;
        text-align: center;
    }
    
    #export-controls {
        flex-direction: column;
    }
    
    .export-buttons {
        width: 100%;
        justify-content: center;
    }
}