/* ===================================
   Coloring Game Styles
   =================================== */

.coloring-game-container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
}

/* Color Palette Sidebar */
.color-palette {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 100px;
    height: fit-content;
}

.color-palette h3 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-weight: 600;
}

.colors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.color-option {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    border: 3px solid transparent;
}

.color-option:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.color-option.active {
    border-color: var(--text-dark);
    transform: scale(1.15);
    box-shadow: 0 0 0 3px rgba(18, 99, 199, 0.2);
}

/* Tool Selector */
.tool-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tool-btn {
    padding: 0.75rem;
    border: 2px solid #E2E8F0;
    border-radius: var(--radius-md);
    background: white;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
}

.tool-btn:hover {
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tool-btn.active {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

/* Pen Settings */
.pen-settings {
    margin-bottom: 2rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--bg-light);
}

.setting-item {
    margin-bottom: 1rem;
}

.setting-item label {
    display: block;
    font-size: 0.95rem;
    color: var(--text-medium);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

#penSize {
    width: 100%;
    margin-bottom: 0.5rem;
    accent-color: var(--primary-blue);
}

#penSizeValue {
    display: inline-block;
    font-weight: 700;
    color: var(--primary-blue);
    font-size: 1.1rem;
}

.setting-item input[type="checkbox"] {
    margin-right: 0.5rem;
    width: auto;
    cursor: pointer;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--bg-light);
}

.action-buttons .btn {
    width: 100%;
    justify-content: center;
}

/* Canvas Area */
.canvas-area {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
    overflow: hidden;
}

#coloredImage {
    display: block;
    width: 99%;
    height: auto;
    position: relative;
    z-index: 0;
    left: 15px;
}

#coloringCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: crosshair;
    z-index: 1;
}

#coloringImage {
    position: absolute;
    top: 0;
    left: 0;
    width: calc(100% - 16px);
    height: 100%;
    z-index: 2;
    mix-blend-mode: multiply;
    pointer-events: none;
}

.current-color-display {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    justify-content: center;
}

.current-color-display span {
    font-weight: 600;
    color: var(--text-medium);
}

#currentColorBox {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 3px solid white;
}

/* Sparkle Animation */
@keyframes sparkle {
    0% {
        opacity: 1;
        transform: scale(0) rotate(0deg);
    }
    50% {
        opacity: 1;
        transform: scale(1) rotate(180deg);
    }
    100% {
        opacity: 0;
        transform: scale(0) rotate(360deg);
    }
}

.sparkle {
    position: absolute;
    pointer-events: none;
    font-size: 20px;
    animation: sparkle 0.8s ease-out forwards;
    z-index: 1000;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .coloring-game-container {
        grid-template-columns: 1fr;
    }

    .color-palette {
        position: static;
        margin-bottom: 2rem;
    }

    .colors-grid {
        grid-template-columns: repeat(8, 1fr);
    }
}

@media (max-width: 768px) {
    .coloring-game-container {
        padding: 0 1rem;
    }

    .color-palette,
    .canvas-area {
        padding: 1.5rem;
    }

    .colors-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

@media (max-width: 480px) {
    .colors-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 0.5rem;
    }

    .canvas-area {
        padding: 1rem;
    }
}