/* Extracted styles from index.html */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    font-family: Arial, sans-serif;
    background: #1a1a1a;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding: 20px 20px 90px 20px;
    color: white;
    overflow: auto;
}

h1 {
    margin-bottom: 8px;
    font-size: 1.1rem;
    text-align: center;
}

.controls-bar {
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
    margin-bottom: 8px;
    padding: 10px 16px;
    background: linear-gradient(135deg, #2a2a3a, #1a1a2a);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    border: 1px solid rgba(255,255,255,0.1);
    min-height: 50px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    min-width: 100%;
}

/* Boutons beaux et simples */
button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 12px;
    font-size: 1.2rem;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
    touch-action: manipulation;
    height: 36px;
    min-width: 36px;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

button:hover { 
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

button:active { 
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.btn-connect { 
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
}

.btn-clear { 
    background: linear-gradient(135deg, #f44336, #d32f2f);
    color: white;
}

.btn-save { 
    background: linear-gradient(135deg, #2196F3, #1976D2);
    color: white;
}

.btn-load { 
    background: linear-gradient(135deg, #FF9800, #F57C00);
    color: white;
}

/* Contrôles adaptés */
.brightness-dropdown-control {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(50, 50, 60, 0.9);
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.1);
    height: 36px;
    flex-shrink: 0;
}

.brightness-icon {
    font-size: 1rem;
    opacity: 0.9;
}

.brightness-slider-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.brightness-control input[type="range"] {
    width: 4px;
    height: 60px;
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    writing-mode: bt-lr; /* IE */
    transform: rotate(180deg);
}

.brightness-control input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    background: linear-gradient(135deg, #FFD700, #FFA500);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
    transition: all 0.2s;
}

.brightness-control input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 3px 6px rgba(0,0,0,0.4);
}

.brightness-value {
    min-width: 20px;
    text-align: center;
    font-weight: 600;
    font-size: 0.7rem;
    color: #FFD700;
}

.brightness-toggle {
    background: rgba(60, 60, 70, 0.8);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 4px;
    padding: 2px 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    height: 24px;
    min-width: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brightness-toggle:hover {
    background: rgba(80, 80, 90, 0.8);
    border-color: rgba(255,255,255,0.4);
}

/* Contrôle dropdown */
.brightness-dropdown-control {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(50, 50, 60, 0.9);
    padding: 6px 8px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.1);
    min-height: 40px;
    flex-shrink: 0;
}

.brightness-dropdown-control select {
    background: rgba(30, 30, 40, 0.9);
    color: white;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    outline: none;
    transition: all 0.2s;
    min-width: 60px;
    min-height: 28px; /* avoid fixed height that can clip text */
    line-height: 1.2;
    box-sizing: border-box;
}

/* Ensure selects display text correctly across mobile browsers */
select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    line-height: 1.2;
}

.brightness-dropdown-control select:hover {
    border-color: rgba(255,255,255,0.4);
    background: rgba(40, 40, 50, 0.9);
}

.brightness-dropdown-control select:focus {
    border-color: #FFD700;
    box-shadow: 0 0 0 2px rgba(255, 215, 0, 0.2);
}

.load-mode-control {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(50, 50, 60, 0.9);
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.1);
    min-height: 36px;
    flex-shrink: 0;
}

.mode-icon {
    font-size: 1rem;
    opacity: 0.9;
}

.load-mode-control select {
    background: rgba(30, 30, 40, 0.9);
    color: white;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    outline: none;
    transition: all 0.2s;
    min-width: 36px;
    min-height: 28px;
    line-height: 1.2;
    box-sizing: border-box;
}

.load-mode-control select:hover {
    border-color: rgba(255,255,255,0.4);
    background: rgba(40, 40, 50, 0.9);
}

.load-mode-control select:focus {
    border-color: #2196F3;
    box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.2);
}

input[type="file"] {
    display: none;
}

:root {
    --grid-gap: 2px;
    --ui-height: 120px;
}

.grid-wrapper {
    width: 100%;
    max-width: var(--grid-max);
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.grid {
    width: min(95vw, calc(100vh - 180px));
    aspect-ratio: 1 / 1;
    display: grid;
    grid-template-columns: repeat(16, 1fr);
    grid-auto-rows: 1fr;
    gap: var(--grid-gap);
    background: #333;
    padding: 6px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    max-width: 95vw;
}

.pixel {
    width: 100%;
    height: 100%;
    background: #000;
    border: 1px solid #444;
    cursor: pointer;
    transition: background 0.08s, box-shadow 0.08s, border-color 0.08s;
    touch-action: none;
    -webkit-tap-highlight-color: transparent;
}

.pixel.on {
    box-shadow: 0 0 8px currentColor;
}

.pixel:hover { border-color: #888; }

/* Responsive design - toujours horizontal */
@media (max-width: 768px) {
    .controls-bar {
        gap: 4px;
        padding: 6px 8px;
        margin-bottom: 6px;
        min-height: 45px;
    }
    
    button {
        padding: 8px 10px;
        font-size: 1.2rem;
        height: 35px;
        min-width: 35px;
    }
    
    .brightness-control,
    .brightness-dropdown-control,
    .load-mode-control {
        padding: 4px 6px;
        min-height: 35px;
    }
    
    .brightness-control input[type="range"] {
        height: 50px;
    }
    
    .brightness-value {
        min-width: 20px;
        font-size: 0.7rem;
    }
    
    .load-mode-control select {
        font-size: 0.7rem;
        padding: 4px 6px;
        min-width: 25px;
        min-height: 26px;
        line-height: 1.2;
        box-sizing: border-box;
    }
    
    .grid {
        width: min(98vw, calc(100vh - 180px));
        padding: 4px;
    }
}

@media (max-width: 600px) {
    :root { --ui-height: 120px; }
    body { padding: 8px; }
    h1 { font-size: 1rem; }

    .controls-bar {
        gap: 3px;
        padding: 4px 6px;
        margin-bottom: 4px;
        min-height: 40px;
    }
    
    button {
        padding: 6px 8px;
        font-size: 1.1rem;
        height: 32px;
        min-width: 32px;
    }
    
    .brightness-control,
    .brightness-dropdown-control,
    .load-mode-control {
        padding: 3px 5px;
        min-height: 32px;
    }
    
    .brightness-control input[type="range"] {
        height: 45px;
    }
    
    .brightness-value {
        min-width: 18px;
        font-size: 0.65rem;
    }
    
    .load-mode-control select {
        font-size: 0.65rem;
        padding: 3px 5px;
        min-width: 22px;
        min-height: 24px;
        line-height: 1.1;
        box-sizing: border-box;
    }
    
    .grid {
        width: min(98vw, calc(100vh - 160px));
        padding: 3px;
    }
}

@media (max-width: 480px) {
    .controls-bar {
        gap: 2px;
        padding: 3px 4px;
        margin-bottom: 3px;
        min-height: 36px;
    }
    
    button {
        padding: 4px 6px;
        font-size: 1rem;
        height: 28px;
        min-width: 28px;
    }
    
    .brightness-control,
    .brightness-dropdown-control,
    .load-mode-control {
        padding: 2px 4px;
        min-height: 28px;
    }
    
    .brightness-control input[type="range"] {
        height: 40px;
    }
    
    .brightness-value {
        min-width: 16px;
        font-size: 0.6rem;
    }
    
    .load-mode-control select {
        font-size: 0.6rem;
        padding: 3px 4px;
        min-width: 20px;
        min-height: 22px;
        line-height: 1.05;
        box-sizing: border-box;
    }
    
    .grid {
        width: min(99vw, calc(100vh - 140px));
        padding: 2px;
    }
}

.palette-container {
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    bottom: 10px;
    width: min(98vw, 600px);
    max-width: 98vw;
    background: rgba(30,30,30,0.95);
    padding: 14px;
    border-radius: 12px;
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 18px rgba(0,0,0,0.6);
    z-index: 1000;
    /* Allow wrapping so palette can form multiple rows (we target two rows visually) */
    flex-wrap: wrap;
    align-content: center;
    height: auto;
    max-height: 140px; /* enough for ~2 rows of 48px swatches + padding/gaps */
    overflow-x: auto;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    pointer-events: auto;
}

/* Note: Palette supports wrapping into two rows. The default set contains 20 LED-friendly colors
   (including primaries and high-contrast colors) to display well on a 16x16 LED matrix. */

.swatch {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    border: 2px solid rgba(255,255,255,0.1);
    flex: 0 0 48px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.6);
    cursor: pointer;
    transition: all 0.2s ease;
}

.swatch.selected {
    outline: 3px solid #fff;
    outline-offset: 2px;
}

.swatch.eraser {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: #ddd;
    background: linear-gradient(45deg,#222,#111);
}

.color-picker {
    width: 48px;
    height: 48px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    flex: 0 0 48px;
    border-radius: 10px;
    border: 2px solid rgba(255,255,255,0.1);
    transition: all 0.2s ease;
}

@media (max-width: 420px) {
    .palette-container { 
        gap: 10px; 
        padding: 12px; 
        width: min(99vw, 500px);
    }
    /* Slightly smaller swatches on very small screens to help two-row fit */
    .swatch, .color-picker { 
        width: 36px; 
        height: 36px; 
        flex: 0 0 36px; 
        border-radius: 8px; 
    }
}

/* --- FIX GALLERY CONTAINER ÉCRASÉ SUR PC --- */
@media (min-width: 768px) {
    .gallery-container {
        /* Force single-line gallery with horizontal scroll on desktop */
        flex-wrap: nowrap;             /* Keep items on one line */
        justify-content: flex-start;   /* Align left and allow scrolling */
        align-items: center;
        overflow-x: auto;              /* Enable horizontal scrolling */
        max-width: 100%;
        scroll-snap-type: x mandatory; /* Keep snapping horizontally */
        gap: 16px;

        min-height: 60px;
        padding: 12px 12px;
        align-content: center;
    }

    .gallery-item {
        width: 96px; 
        border-radius: 10px;
    }
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    background: #4CAF50;
    color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    z-index: 2000;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes pixelDrop {
    0% { transform: translateY(-30px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}
.pixel-drop {
    animation: pixelDrop 0.3s ease-out;
}

/* Desktop layout: place grid and palette side-by-side */
@media (min-width: 900px) {
    .main-area {
        display: flex;
        gap: 20px;
        align-items: flex-start;
        justify-content: center;
        width: 100%;
        max-width: 1200px;
    }

    /* Allow grid area to take remaining space and shrink to leave room for the palette */
    .grid-wrapper {
        flex: 1 1 auto;
        width: auto;
        display: flex;
        justify-content: center;
    }

    /* Constrain the grid size so the palette can sit to the right without wrapping */
    .grid {
        /* leave ~300px for palette + gaps */
        width: min(calc(100vw - 320px), calc(100vh - 180px));
        max-width: 100%;
    }

    .palette-container {
        position: static; /* override fixed bottom */
        transform: none;
        margin-left: 8px;
        width: 260px; /* compact column on the right */
        max-height: none;
        overflow: visible;
        flex: 0 0 260px;
        align-self: flex-start;
        padding: 12px;
        justify-content: flex-start;
        flex-wrap: wrap;
        box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    }

    .palette-container .swatch, .palette-container .color-picker {
        margin: 6px;
    }
}

.gallery-container {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding: 14px 10px;
    scroll-snap-type: x mandatory;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(50, 50, 70, 0.9), rgba(30, 30, 50, 0.9));
    max-width: 95vw;
    width: 100%;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.05);
}


.gallery-container::-webkit-scrollbar {
    height: 8px;
}

.gallery-container::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.2);
    border-radius: 4px;
}

.gallery-container::-webkit-scrollbar-thumb {
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 4px;
    transition: background 0.3s;
}

.gallery-container::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(90deg, #764ba2, #667eea);
}

.gallery-item {
    flex: 0 0 auto;
    scroll-snap-align: center;
    border-radius: 10px;
    background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
    padding: 0px;
    box-shadow: 
        0 4px 12px rgba(0,0,0,0.5),
        inset 0 1px 0 rgba(255,255,255,0.1),
        0 0 0 1px rgba(255,255,255,0.05);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 40px;
    height: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.gallery-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.05), transparent);
    transform: rotate(45deg);
    transition: all 0.5s;
}

.gallery-item:hover::before {
    left: 100%;
}

.gallery-item:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 
        0 8px 20px rgba(102, 126, 234, 0.4),
        inset 0 1px 0 rgba(255,255,255,0.15),
        0 0 0 2px rgba(102, 126, 234, 0.3);
}

.gallery-item:active {
    transform: translateY(-2px) scale(1.02);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    border-radius: 6px;
    object-fit: contain;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.gallery-label {
    position: absolute;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.65rem;
    color: rgba(255,255,255,0.6);
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    text-shadow: 0 1px 2px rgba(0,0,0,0.8);
}

.gallery-item:hover .gallery-label {
    opacity: 1;
}