:root {
    /* Paint specific */
    --surface-color: var(--bg-card);
    --surface-hover: var(--bg-body);
    --primary-color: var(--accent);
    --border-color: var(--border-subtle);
    --glass-bg: var(--bg-card);
    --glass-border: var(--border-subtle);

    --checker-1: #e5e5e5;
    --checker-2: #ffffff;
}

[data-theme="dark"] {
    --checker-1: #2a2a2a;
    --checker-2: #1e1e1e;
}

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

body {
    font-family: 'Inter', sans-serif;
    /* Override shared.css body styles for full screen app */
    padding: 0 !important;
    display: block !important;
    height: 100vh;
    overflow: hidden;
    width: 100vw;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100%;
}

/* Top Bar */
.top-bar {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    z-index: 10;
}

.left-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Back Link overrides for toolbar context */
.back-link {
    position: static !important;
    box-shadow: none !important;
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
    color: var(--text-secondary);
    font-size: 16px;
}

.back-link:hover {
    background: var(--surface-hover) !important;
    color: var(--text-primary) !important;
    transform: none !important;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 16px;
}

.logo i {
    font-size: 20px;
    color: var(--primary-color);
}

.actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

button {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

button:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

button.active {
    background: var(--primary-color);
    color: white;
}

.primary-btn {
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    gap: 8px;
}

.primary-btn:hover {
    background: var(--accent);
    filter: brightness(1.1);
}


.separator {
    width: 1px;
    height: 24px;
    background: var(--border-color);
    margin: 0 8px;
}

/* Workspace */
.workspace {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
}

.side-bar {
    width: 60px;
    background: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 0;
    gap: 16px;
    z-index: 5;
}

.side-bar.right {
    width: 280px;
    border-right: none;
    border-left: 1px solid var(--border-color);
    align-items: stretch;
    padding: 20px;
}

.tool-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    align-items: center;
}

.tool-btn {
    width: 40px;
    height: 40px;
}

/* Canvas Area */
.canvas-container {
    flex: 1;
    background-color: var(--checker-2);
    background-image:
        linear-gradient(45deg, var(--checker-1) 25%, transparent 25%),
        linear-gradient(-45deg, var(--checker-1) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--checker-1) 75%),
        linear-gradient(-45deg, transparent 75%, var(--checker-1) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    padding: 40px;
}

canvas {
    background: white;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    cursor: crosshair;
}

/* Right Sidebar Properties */
.property-group {
    margin-bottom: 24px;
}

.property-group label {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.color-picker-wrapper {
    position: relative;
    height: 40px;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 12px;
    border: 2px solid var(--border-color);
}

input[type="color"] {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    cursor: pointer;
    border: none;
    padding: 0;
    margin: 0;
}

.color-palette {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}

.color-swatch {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid var(--border-subtle);
    transition: transform 0.1s;
}

.color-swatch:hover {
    transform: scale(1.1);
    z-index: 1;
}

input[type="range"] {
    width: 100%;
    height: 4px;
    background: var(--surface-hover);
    border-radius: 2px;
    appearance: none;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--bg-card);
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .workspace {
        flex-direction: column;
    }

    .side-bar {
        width: 100%;
        height: auto;
        flex-direction: row;
        padding: 10px;
        overflow-x: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .side-bar.right {
        display: none;
        /* For mobile MVP, maybe hide or make modal */
    }

    .tool-group {
        flex-direction: row;
        width: auto;
    }
}