/* Windows 95 MS Paint Style */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --win-bg: #c0c0c0;
    --win-dark: #808080;
    --win-darker: #404040;
    --win-light: #dfdfdf;
    --win-lighter: #ffffff;
    --win-blue: #000080;
    --win-title-active: linear-gradient(90deg, #000080, #1084d0);
    --win-title-text: #ffffff;
}

body {
    font-family: 'Segoe UI', Tahoma, sans-serif;
    font-size: 11px;
    background: #008080;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    overflow: hidden;
}

/* Window */
.window {
    background: var(--win-bg);
    border: 2px solid;
    border-color: var(--win-lighter) var(--win-darker) var(--win-darker) var(--win-lighter);
    box-shadow: 1px 1px 0 var(--win-darker);
    width: 100%;
    max-width: 900px;
    height: calc(100vh - 20px);
    max-height: 700px;
    display: flex;
    flex-direction: column;
}

/* Title Bar */
.title-bar {
    background: var(--win-title-active);
    padding: 2px 3px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.title-bar-text {
    color: var(--win-title-text);
    font-weight: bold;
    font-size: 12px;
    padding-left: 2px;
}

.title-bar-controls {
    display: flex;
    gap: 2px;
}

.title-btn {
    width: 16px;
    height: 14px;
    border: 1px solid;
    border-color: var(--win-lighter) var(--win-darker) var(--win-darker) var(--win-lighter);
    background: var(--win-bg);
    font-size: 9px;
    line-height: 1;
    cursor: pointer;
    position: relative;
}

.title-btn:active {
    border-color: var(--win-darker) var(--win-lighter) var(--win-lighter) var(--win-darker);
}

.title-btn.minimize::before { content: '_'; position: absolute; bottom: 1px; left: 3px; }
.title-btn.maximize::before { content: '□'; position: absolute; top: 0; left: 3px; }
.title-btn.close::before { content: '×'; position: absolute; top: -1px; left: 3px; font-size: 12px; }

/* Menu Bar */
.menu-bar {
    background: var(--win-bg);
    padding: 2px 4px;
    display: flex;
    gap: 2px;
    border-bottom: 1px solid var(--win-dark);
}

.menu-item {
    padding: 2px 8px;
    cursor: pointer;
}

.menu-item:hover {
    background: var(--win-blue);
    color: white;
}

.menu-right {
    margin-left: auto;
    color: var(--win-dark);
}

.menu-right:hover {
    background: transparent;
    color: var(--win-dark);
}

/* Main Area */
.main-area {
    flex: 1;
    display: flex;
    overflow: hidden;
    border: 1px solid;
    border-color: var(--win-dark) var(--win-lighter) var(--win-lighter) var(--win-dark);
    margin: 2px;
}

/* Toolbox */
.toolbox {
    width: 60px;
    background: var(--win-bg);
    padding: 4px;
    border-right: 1px solid var(--win-dark);
    flex-shrink: 0;
}

.tool-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
}

.tool-btn {
    width: 24px;
    height: 24px;
    border: 1px solid;
    border-color: var(--win-lighter) var(--win-darker) var(--win-darker) var(--win-lighter);
    background: var(--win-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.tool-btn:hover {
    background: var(--win-light);
}

.tool-btn:active,
.tool-btn.active {
    border-color: var(--win-darker) var(--win-lighter) var(--win-lighter) var(--win-darker);
    background: var(--win-light);
}

.tool-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Tool Icons - Pixel art via CSS box-shadow */
.tool-icon {
    width: 16px;
    height: 16px;
    position: relative;
}

.tool-icon::before {
    content: '';
    position: absolute;
    width: 1px;
    height: 1px;
    top: 0;
    left: 0;
}

/* Pencil icon */
.tool-icon.pencil::before {
    box-shadow:
        10px 2px #000, 11px 2px #000,
        9px 3px #000, 10px 3px #fc0, 11px 3px #fc0, 12px 3px #000,
        8px 4px #000, 9px 4px #fc0, 10px 4px #fc0, 11px 4px #fc0, 12px 4px #000,
        7px 5px #000, 8px 5px #fc0, 9px 5px #fc0, 10px 5px #fc0, 11px 5px #000,
        6px 6px #000, 7px 6px #fc0, 8px 6px #fc0, 9px 6px #fc0, 10px 6px #000,
        5px 7px #000, 6px 7px #fea, 7px 7px #fea, 8px 7px #fea, 9px 7px #000,
        4px 8px #000, 5px 8px #fea, 6px 8px #fea, 7px 8px #fea, 8px 8px #000,
        3px 9px #000, 4px 9px #fea, 5px 9px #fea, 6px 9px #fea, 7px 9px #000,
        2px 10px #000, 3px 10px #000, 4px 10px #000, 5px 10px #000, 6px 10px #000,
        2px 11px #000, 3px 11px #000, 4px 11px #000,
        2px 12px #000, 3px 12px #000,
        2px 13px #000;
}

/* Eraser icon */
.tool-icon.eraser::before {
    box-shadow:
        4px 4px #000, 5px 4px #000, 6px 4px #000, 7px 4px #000, 8px 4px #000, 9px 4px #000, 10px 4px #000,
        3px 5px #000, 4px 5px #fff, 5px 5px #fff, 6px 5px #fff, 7px 5px #fff, 8px 5px #fff, 9px 5px #fff, 10px 5px #000,
        3px 6px #000, 4px 6px #fff, 5px 6px #fff, 6px 6px #fff, 7px 6px #fff, 8px 6px #fff, 9px 6px #fff, 10px 6px #000,
        3px 7px #000, 4px 7px #000, 5px 7px #000, 6px 7px #000, 7px 7px #000, 8px 7px #000, 9px 7px #000, 10px 7px #000,
        3px 8px #000, 4px 8px #00f, 5px 8px #00f, 6px 8px #00f, 7px 8px #00f, 8px 8px #00f, 9px 8px #00f, 10px 8px #000,
        3px 9px #000, 4px 9px #00f, 5px 9px #00f, 6px 9px #00f, 7px 9px #00f, 8px 9px #00f, 9px 9px #00f, 10px 9px #000,
        3px 10px #000, 4px 10px #00f, 5px 10px #00f, 6px 10px #00f, 7px 10px #00f, 8px 10px #00f, 9px 10px #00f, 10px 10px #000,
        4px 11px #000, 5px 11px #000, 6px 11px #000, 7px 11px #000, 8px 11px #000, 9px 11px #000, 10px 11px #000;
}

/* Undo - arrow pointing left with curve */
.tool-icon.undo::before {
    box-shadow:
        3px 3px #000,
        2px 4px #000, 3px 4px #000,
        1px 5px #000, 2px 5px #000, 3px 5px #000, 4px 5px #000, 5px 5px #000, 6px 5px #000, 7px 5px #000, 8px 5px #000, 9px 5px #000,
        2px 6px #000, 3px 6px #000, 9px 6px #000, 10px 6px #000,
        3px 7px #000, 10px 7px #000, 11px 7px #000,
        10px 8px #000, 11px 8px #000,
        10px 9px #000, 11px 9px #000,
        9px 10px #000, 10px 10px #000,
        4px 11px #000, 5px 11px #000, 6px 11px #000, 7px 11px #000, 8px 11px #000, 9px 11px #000;
}

/* Clear my pixels - trash/X icon */
.tool-icon.clear-mine::before {
    box-shadow:
        3px 2px #c00, 4px 2px #c00, 11px 2px #c00, 12px 2px #c00,
        4px 3px #c00, 5px 3px #c00, 10px 3px #c00, 11px 3px #c00,
        5px 4px #c00, 6px 4px #c00, 9px 4px #c00, 10px 4px #c00,
        6px 5px #c00, 7px 5px #c00, 8px 5px #c00, 9px 5px #c00,
        7px 6px #c00, 8px 6px #c00,
        6px 7px #c00, 7px 7px #c00, 8px 7px #c00, 9px 7px #c00,
        5px 8px #c00, 6px 8px #c00, 9px 8px #c00, 10px 8px #c00,
        4px 9px #c00, 5px 9px #c00, 10px 9px #c00, 11px 9px #c00,
        3px 10px #c00, 4px 10px #c00, 11px 10px #c00, 12px 10px #c00;
}

/* Move/hand - four arrows */
.tool-icon.move::before {
    box-shadow:
        7px 1px #000,
        6px 2px #000, 7px 2px #000, 8px 2px #000,
        5px 3px #000, 7px 3px #000, 9px 3px #000,
        7px 4px #000,
        7px 5px #000,
        1px 7px #000,
        2px 6px #000, 2px 7px #000, 2px 8px #000,
        3px 5px #000, 3px 7px #000, 3px 9px #000,
        4px 7px #000, 5px 7px #000,
        7px 6px #000,
        9px 7px #000, 10px 7px #000,
        11px 5px #000, 11px 7px #000, 11px 9px #000,
        12px 6px #000, 12px 7px #000, 12px 8px #000,
        13px 7px #000,
        7px 8px #000,
        7px 9px #000, 7px 10px #000,
        5px 11px #000, 7px 11px #000, 9px 11px #000,
        6px 12px #000, 7px 12px #000, 8px 12px #000,
        7px 13px #000;
}

/* Zoom in - magnifier with + */
.tool-icon.zoom-in::before {
    box-shadow:
        4px 1px #000, 5px 1px #000, 6px 1px #000, 7px 1px #000,
        3px 2px #000, 4px 2px #fff, 5px 2px #fff, 6px 2px #fff, 7px 2px #fff, 8px 2px #000,
        2px 3px #000, 3px 3px #fff, 4px 3px #fff, 5px 3px #000, 6px 3px #fff, 7px 3px #fff, 8px 3px #fff, 9px 3px #000,
        2px 4px #000, 3px 4px #fff, 4px 4px #000, 5px 4px #000, 6px 4px #000, 7px 4px #fff, 8px 4px #fff, 9px 4px #000,
        2px 5px #000, 3px 5px #fff, 4px 5px #fff, 5px 5px #000, 6px 5px #fff, 7px 5px #fff, 8px 5px #fff, 9px 5px #000,
        3px 6px #000, 4px 6px #fff, 5px 6px #fff, 6px 6px #fff, 7px 6px #fff, 8px 6px #000, 9px 6px #000,
        4px 7px #000, 5px 7px #000, 6px 7px #000, 7px 7px #000, 9px 7px #000, 10px 7px #000,
        10px 8px #000, 11px 8px #000,
        11px 9px #000, 12px 9px #000,
        12px 10px #000, 13px 10px #000;
}

/* Zoom out - magnifier with - */
.tool-icon.zoom-out::before {
    box-shadow:
        4px 1px #000, 5px 1px #000, 6px 1px #000, 7px 1px #000,
        3px 2px #000, 4px 2px #fff, 5px 2px #fff, 6px 2px #fff, 7px 2px #fff, 8px 2px #000,
        2px 3px #000, 3px 3px #fff, 4px 3px #fff, 5px 3px #fff, 6px 3px #fff, 7px 3px #fff, 8px 3px #fff, 9px 3px #000,
        2px 4px #000, 3px 4px #fff, 4px 4px #000, 5px 4px #000, 6px 4px #000, 7px 4px #fff, 8px 4px #fff, 9px 4px #000,
        2px 5px #000, 3px 5px #fff, 4px 5px #fff, 5px 5px #fff, 6px 5px #fff, 7px 5px #fff, 8px 5px #fff, 9px 5px #000,
        3px 6px #000, 4px 6px #fff, 5px 6px #fff, 6px 6px #fff, 7px 6px #fff, 8px 6px #000, 9px 6px #000,
        4px 7px #000, 5px 7px #000, 6px 7px #000, 7px 7px #000, 9px 7px #000, 10px 7px #000,
        10px 8px #000, 11px 8px #000,
        11px 9px #000, 12px 9px #000,
        12px 10px #000, 13px 10px #000;
}

/* Canvas Area */
.canvas-area {
    flex: 1;
    background: var(--win-dark);
    overflow: hidden;
    position: relative;
}

.canvas-scroll {
    width: 100%;
    height: 100%;
    overflow: auto;
    background:
        linear-gradient(45deg, #666 25%, transparent 25%),
        linear-gradient(-45deg, #666 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #666 75%),
        linear-gradient(-45deg, transparent 75%, #666 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    background-color: #808080;
}

.canvas-wrapper {
    display: inline-flex;
    min-width: 100%;
    min-height: 100%;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
}

#pixel-canvas {
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    background: white;
    cursor: crosshair;
    box-shadow:
        inset -1px -1px 0 var(--win-lighter),
        inset 1px 1px 0 var(--win-darker),
        2px 2px 4px rgba(0,0,0,0.3);
}

#pixel-canvas.move-mode {
    cursor: grab;
}

#pixel-canvas.move-mode:active {
    cursor: grabbing;
}

/* Color Palette */
.palette-bar {
    display: flex;
    align-items: center;
    padding: 4px;
    gap: 8px;
    border-top: 1px solid var(--win-lighter);
    background: var(--win-bg);
}

.current-colors {
    width: 32px;
    height: 32px;
    position: relative;
}

.color-display {
    position: relative;
    width: 100%;
    height: 100%;
}

.fg-color {
    position: absolute;
    top: 0;
    left: 0;
    width: 22px;
    height: 22px;
    background: #000000;
    border: 1px solid;
    border-color: var(--win-darker) var(--win-lighter) var(--win-lighter) var(--win-darker);
    z-index: 2;
}

.bg-color {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 22px;
    height: 22px;
    background: #ffffff;
    border: 1px solid;
    border-color: var(--win-darker) var(--win-lighter) var(--win-lighter) var(--win-darker);
    z-index: 1;
}

.color-palette {
    display: flex;
    flex-wrap: wrap;
    gap: 1px;
    padding: 2px;
    background: var(--win-bg);
    border: 1px solid;
    border-color: var(--win-darker) var(--win-lighter) var(--win-lighter) var(--win-darker);
}

.color-swatch {
    width: 16px;
    height: 16px;
    cursor: pointer;
    border: 1px solid var(--win-darker);
}

.color-swatch:hover {
    border-color: white;
}

.color-swatch.selected {
    border: 2px solid white;
    outline: 1px solid black;
}

/* Status Bar */
.status-bar {
    display: flex;
    padding: 2px;
    gap: 2px;
    background: var(--win-bg);
    border-top: 1px solid var(--win-lighter);
}

.status-section {
    padding: 2px 6px;
    border: 1px solid;
    border-color: var(--win-dark) var(--win-lighter) var(--win-lighter) var(--win-dark);
    background: var(--win-bg);
    font-size: 11px;
}

.status-section.coordinates {
    min-width: 80px;
}

.status-section.status-text {
    flex: 1;
}

.status-section.zoom-level {
    min-width: 50px;
    text-align: center;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-window {
    background: var(--win-bg);
    border: 2px solid;
    border-color: var(--win-lighter) var(--win-darker) var(--win-darker) var(--win-lighter);
    box-shadow: 2px 2px 8px rgba(0,0,0,0.5);
    min-width: 200px;
}

.modal-content {
    padding: 16px;
}

.modal-content p {
    margin-bottom: 8px;
}

.modal-buttons {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
}

.win-btn {
    min-width: 75px;
    padding: 4px 12px;
    border: 2px solid;
    border-color: var(--win-lighter) var(--win-darker) var(--win-darker) var(--win-lighter);
    background: var(--win-bg);
    font-family: inherit;
    font-size: 11px;
    cursor: pointer;
}

.win-btn:active {
    border-color: var(--win-darker) var(--win-lighter) var(--win-lighter) var(--win-darker);
}

.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 600px) {
    body {
        padding: 0;
    }

    .window {
        max-width: 100%;
        height: 100vh;
        max-height: 100vh;
        border: none;
    }

    .toolbox {
        width: 50px;
    }

    .tool-btn {
        width: 22px;
        height: 22px;
    }

    .color-swatch {
        width: 14px;
        height: 14px;
    }
}

/* Scrollbar Win95 style */
.canvas-scroll::-webkit-scrollbar {
    width: 16px;
    height: 16px;
}

.canvas-scroll::-webkit-scrollbar-track {
    background: var(--win-bg);
}

.canvas-scroll::-webkit-scrollbar-thumb {
    background: var(--win-bg);
    border: 2px solid;
    border-color: var(--win-lighter) var(--win-darker) var(--win-darker) var(--win-lighter);
}

.canvas-scroll::-webkit-scrollbar-button {
    background: var(--win-bg);
    border: 1px solid;
    border-color: var(--win-lighter) var(--win-darker) var(--win-darker) var(--win-lighter);
}