:root {
    --bg-color: #1a1a1a;
    --sidebar-bg: #252525;
    --text-color: #e0e0e0;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --border-color: #333;
    --canvas-bg: #ffffff;
    --tool-bg: #333;
    --tool-hover: #404040;
    --tool-active: #3b82f6;
    --danger-color: #ef4444;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100%;
}

/* Toolbar Styles */
.toolbar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 2rem;
    overflow-y: auto;
}

.brand h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    letter-spacing: -0.5px;
}

.tool-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.tool-section label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #888;
    font-weight: 500;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.tool-btn {
    aspect-ratio: 1;
    background-color: var(--tool-bg);
    border: none;
    border-radius: 8px;
    color: #aaa;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.tool-btn:hover {
    background-color: var(--tool-hover);
    color: #fff;
    transform: translateY(-1px);
}

.tool-btn.active {
    background-color: var(--tool-active);
    color: #fff;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
}

.tool-btn svg {
    width: 20px;
    height: 20px;
}

/* Options */
.option-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.option-group span {
    font-size: 0.9rem;
    color: #ccc;
}

input[type="range"] {
    width: 60%;
    accent-color: var(--accent-color);
}

.color-picker-wrapper {
    position: relative;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid #fff;
}

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

.colors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.color-option {
    aspect-ratio: 1;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.2s;
}

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

/* Actions */
.actions {
    margin-top: auto;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background-color: var(--tool-bg);
    border: none;
    border-radius: 8px;
    color: #e0e0e0;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    margin-bottom: 0.5rem;
}

.action-btn:hover {
    background-color: var(--tool-hover);
}

.action-btn svg {
    width: 18px;
    height: 18px;
}

.action-btn.primary {
    background-color: var(--accent-color);
    color: white;
}

.action-btn.primary:hover {
    background-color: var(--accent-hover);
}

/* Canvas Area */
.canvas-area {
    flex: 1;
    background-color: #121212;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    overflow: auto;
    background-image: radial-gradient(#333 1px, transparent 1px);
    background-size: 20px 20px;
}

.canvas-container {
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
    background-color: var(--canvas-bg);
    border-radius: 4px;
    overflow: hidden;
}

canvas {
    display: block;
    cursor: crosshair;
}

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

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

    .brand {
        display: none;
    }

    .tool-section {
        min-width: max-content;
    }

    .actions {
        margin-top: 0;
        flex-direction: row;
    }
}