/* ===============================================
   Responsive Design - Mobile First
   =============================================== */

/* Mobile Devices (320px - 767px) */
/* Base styles in main.css are mobile-first */

@media (max-width: 767px) {
    /* Header */
    .main-header .container {
        flex-direction: column;
        gap: 1rem;
    }

    .main-nav {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .main-nav .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    /* Hero */
    .hero {
        padding: 2rem 1rem;
    }

    .hero h2 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 1rem;
    }

    /* Category Grid */
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .category-card {
        padding: 1rem;
    }

    .category-icon {
        font-size: 3rem;
    }

    /* Coloring Page - Stacked Layout */
    .coloring-container {
        flex-direction: column;
        padding: 0.5rem;
        gap: 0.5rem;
    }

    /* Canvas First (Top) */
    .canvas-panel {
        order: 1;
        padding: 1rem;
        min-height: 300px;
    }

    /* Advanced Options (Middle - Collapsible) */
    .advanced-panel {
        order: 2;
        width: 100%;
        padding: 0;
        box-shadow: none;
        background-color: transparent;
        max-height: none;
    }

    .advanced-toggle {
        display: block;
    }

    .advanced-content {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        background-color: white;
        border-radius: 8px;
        padding: 0;
    }

    .advanced-content.open {
        max-height: 1000px;
        padding: 1rem;
    }

    .pattern-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Color Panel (Bottom - Fixed) */
    .color-panel {
        order: 3;
        width: 100%;
        position: sticky;
        bottom: 0;
        z-index: 100;
        padding: 1rem;
    }

    .pencil-indicator {
        display: none;
    }

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

    .color-btn {
        min-width: 50px;
        min-height: 50px;
    }

    /* Footer */
    .main-footer .container {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .footer-nav {
        justify-content: center;
    }

    /* Content Pages */
    .content-page {
        padding: 1.5rem;
        margin: 1rem;
    }

    /* Image Grid */
    .image-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

/* Tablet Devices (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }

    /* Category Grid */
    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Coloring Page - Compact Layout */
    .coloring-container {
        flex-direction: column;
        gap: 1rem;
    }

    .color-panel {
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }

    .pencil-indicator {
        flex: 0 0 auto;
    }

    .color-palette {
        flex: 1;
        max-width: 400px;
    }

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

    #clear-btn {
        flex: 0 0 auto;
        margin-top: 0;
        align-self: center;
    }

    .canvas-panel {
        order: 1;
        min-height: 500px;
    }

    .advanced-panel {
        order: 3;
        width: 100%;
        display: flex;
        flex-direction: row;
        gap: 2rem;
        max-height: none;
    }

    .advanced-content {
        display: flex;
        flex-direction: row;
        width: 100%;
        gap: 2rem;
    }

    .advanced-section {
        flex: 1;
        border-bottom: none;
        border-right: 1px solid #e0e0e0;
        padding-right: 1.5rem;
        padding-bottom: 0;
    }

    .advanced-section:last-child {
        border-right: none;
        padding-right: 0;
    }

    /* Image Grid */
    .image-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop Devices (1025px+) */
@media (min-width: 1025px) {
    /* Three-Column Layout for Coloring Page */
    .coloring-container {
        flex-direction: row;
    }

    .color-panel {
        order: 1;
        width: 220px;
    }

    .canvas-panel {
        order: 2;
        flex: 1;
    }

    .advanced-panel {
        order: 3;
        width: 280px;
    }

    /* Category Grid */
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    /* Image Grid */
    .image-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Large Desktop (1400px+) */
@media (min-width: 1400px) {
    .category-grid {
        grid-template-columns: repeat(6, 1fr);
    }

    .image-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .coloring-container {
        max-width: 1800px;
    }

    .color-panel {
        width: 250px;
    }

    .advanced-panel {
        width: 320px;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .svg-container svg {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Landscape Orientation (Mobile) */
@media (max-width: 767px) and (orientation: landscape) {
    .coloring-container {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .canvas-panel {
        flex: 1;
        min-width: 60%;
    }

    .color-panel {
        order: 2;
        width: auto;
        flex: 1;
        position: relative;
    }

    .advanced-panel {
        order: 3;
        width: 100%;
    }
}

/* Print Styles */
@media print {
    .main-header,
    .main-footer,
    .color-panel,
    .advanced-panel,
    .btn {
        display: none !important;
    }

    .canvas-panel {
        box-shadow: none;
        padding: 0;
    }

    .svg-container svg {
        max-width: 100%;
        max-height: 100vh;
    }

    body {
        background-color: white;
    }
}

/* Accessibility - Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    /* Could add dark mode styles here if desired */
    /* Currently not in MVP requirements, but prepared for future */
}