/* ===================================
   Responsive Design
   =================================== */

/* Mobile Styles (< 768px) */
@media (max-width: 767px) {
    body {
        padding: var(--spacing-sm);
    }

    .header {
        margin-bottom: var(--spacing-xl);
        padding: var(--spacing-lg) 0;
    }

    .header h1 {
        font-size: var(--font-2xl);
    }

    .subtitle {
        font-size: var(--font-md);
    }

    /* Requirements Panel */
    .requirements-panel {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-lg);
    }

    .requirements-panel h2 {
        font-size: var(--font-lg);
    }

    .checklist-item {
        padding: var(--spacing-sm);
        font-size: var(--font-sm);
    }

    .checkbox {
        font-size: var(--font-xl);
        margin-right: var(--spacing-sm);
    }

    .status-indicator {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-md);
    }

    .traffic-light {
        width: 2.5rem;
        height: 2.5rem;
    }

    .status-message {
        font-size: var(--font-md);
    }

    /* Upload Section */
    .upload-zone {
        padding: var(--spacing-xl);
    }

    .frame-outline {
        font-size: var(--font-xl);
    }

    .upload-text {
        font-size: var(--font-lg);
    }

    /* Editor Section */
    .editor-section {
        padding: var(--spacing-lg);
    }

    .canvas-container {
        margin-bottom: var(--spacing-lg);
        /* Note: Size controlled by JavaScript based on selected dimensions */
    }

    .controls-panel {
        width: 100%;
    }

    .control-card {
        padding: var(--spacing-md);
    }

    .zoom-slider-row input[type="range"] {
        min-width: 0;
    }

    #zoomInput {
        width: 70px;
        padding: var(--spacing-xs);
        font-size: var(--font-sm);
    }

    /* Touch-friendly buttons */
    .btn-control {
        width: 50px;
        height: 50px;
        font-size: var(--font-2xl);
    }

    .btn {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }

    .btn-secondary {
        margin-right: 0;
    }

    /* Download Section */
    .download-section {
        padding: var(--spacing-lg);
    }

    .download-section h2 {
        font-size: var(--font-xl);
    }

    .download-options {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .download-options .btn {
        width: 100%;
    }

    /* Help Section */
    .help-section {
        padding: var(--spacing-md);
    }

    .help-section summary {
        font-size: var(--font-md);
    }

    .examples-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .example-item {
        padding: var(--spacing-md);
    }

    .example-label {
        font-size: var(--font-md);
    }

    .tips {
        padding: var(--spacing-md);
    }

    .tips h3 {
        font-size: var(--font-md);
    }

    /* Toast notifications on mobile */
    .toast-container {
        top: 10px;
        right: 10px;
        left: 10px;
        width: auto;
    }

    .toast {
        min-width: auto;
        width: 100%;
        padding: var(--spacing-md);
    }

    .toast-message {
        font-size: var(--font-sm);
    }

    .toast-icon {
        font-size: var(--font-xl);
    }
}

/* Tablet Styles (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .container {
        max-width: 900px;
    }

    .header h1 {
        font-size: var(--font-2xl);
    }

    /* Two-column layout for larger tablets */
    .editor-section {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: var(--spacing-xl);
        align-items: start;
    }

    .canvas-container {
        margin-bottom: 0;
    }

    .controls-panel {
        max-width: none;
    }

    .examples-row {
        gap: var(--spacing-lg);
    }
}

/* Desktop Styles (> 1024px) */
@media (min-width: 1025px) {
    /* Enhanced desktop layout */
    .editor-section {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: var(--spacing-2xl);
        align-items: start;
    }

    .canvas-container {
        margin-bottom: 0;
        /* Note: Size controlled by JavaScript based on selected dimensions */
    }

    .controls-panel {
        max-width: none;
    }

    .download-options {
        gap: var(--spacing-lg);
    }

    /* Hover effects for desktop */
    .checklist-item:hover {
        background: #f3f4f6;
    }

    .btn:hover {
        transform: translateY(-2px);
    }
}

/* Small mobile devices (< 375px) */
@media (max-width: 374px) {
    .header h1 {
        font-size: var(--font-xl);
    }

    .frame-outline {
        font-size: var(--font-lg);
    }

    /* Note: canvas-container size controlled by JavaScript */

    .btn-control {
        width: 44px;
        height: 44px;
        font-size: var(--font-xl);
    }

    .horizontal-controls {
        gap: var(--spacing-sm);
    }
}

/* Large desktop (> 1440px) */
@media (min-width: 1441px) {
    .container {
        max-width: 1400px;
    }

    /* Note: canvas-container size controlled by JavaScript based on selected dimensions */
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    .btn {
        min-height: 48px;
        padding: var(--spacing-lg) var(--spacing-xl);
    }

    .btn-control {
        min-width: 48px;
        min-height: 48px;
    }

    input[type="range"] {
        height: 12px;
    }

    input[type="range"]::-webkit-slider-thumb {
        width: 28px;
        height: 28px;
    }

    input[type="range"]::-moz-range-thumb {
        width: 28px;
        height: 28px;
    }

    /* Remove hover effects on touch devices */
    .upload-zone:hover {
        border-color: var(--color-border);
        background: var(--color-surface);
    }

    .btn:hover {
        transform: none;
    }

    .btn-control:hover {
        background: var(--color-surface);
        color: var(--color-text);
        border-color: var(--color-border);
    }
}

/* Print styles */
@media print {
    .upload-section,
    .controls-panel,
    .help-section,
    .footer {
        display: none;
    }

    .canvas-container {
        border: 1px solid #000;
    }
}

/* Landscape mode on mobile */
@media (max-width: 767px) and (orientation: landscape) {
    .editor-section {
        display: flex;
        flex-direction: row;
        gap: var(--spacing-lg);
        align-items: flex-start;
    }

    .canvas-container {
        margin-bottom: 0;
        width: auto;
        height: auto;
        max-width: 40vw;
        max-height: 70vh;
        min-width: 150px;
        min-height: 200px;
    }

    #photoCanvas {
        max-width: 100%;
        max-height: 100%;
    }

    /* For very narrow landscape screens */
    @media (max-height: 500px) and (orientation: landscape) {
        .canvas-container {
            max-width: 35vw;
            max-height: 60vh;
            min-width: 120px;
            min-height: 160px;
        }
    }

    .controls-panel {
        width: auto;
        flex: 1;
        min-width: 200px;
    }

    /* Adjust upload section for landscape */
    .upload-section {
        padding: var(--spacing-md);
    }

    .frame-outline {
        font-size: var(--font-lg);
    }

    /* Adjust requirements panel */
    .requirements-panel {
        padding: var(--spacing-md);
    }

    /* Adjust download section */
    .download-section {
        padding: var(--spacing-lg);
    }

    .download-options {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .download-options .btn {
        width: 100%;
    }

    .editor-section {
        padding: var(--spacing-lg);
    }

    .controls-panel {
        padding: var(--spacing-md);
    }

    .control-card {
        padding: var(--spacing-md);
    }

    .zoom-slider-row input[type="range"] {
        min-width: 0;
    }

    .position-grid {
        grid-template-columns: repeat(3, minmax(40px, 1fr));
        gap: var(--spacing-sm);
    }

    .btn-control {
        width: 40px;
        height: 40px;
        font-size: var(--font-lg);
    }

    /* Ensure download buttons work well in landscape */
    .download-options {
        flex-wrap: wrap;
    }

    /* Ensure canvas maintains aspect ratio in landscape */
    .canvas-overlay {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        border: 2px dashed rgba(255, 255, 255, 0.5);
        pointer-events: none;
        box-sizing: border-box;
    }
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
        --color-text-light: #000000;
    }

    .upload-zone {
        border-width: 4px;
    }

    .btn {
        border: 2px solid currentColor;
    }
}

/* Dark mode support (optional - for future enhancement) */
@media (prefers-color-scheme: dark) {
    /* Uncomment to enable dark mode
    :root {
        --color-bg: #111827;
        --color-surface: #1f2937;
        --color-border: #374151;
        --color-text: #f9fafb;
        --color-text-light: #9ca3af;
    }

    .frame-outline {
        background: #374151;
    }

    .upload-zone:hover {
        background: #1f2937;
    }
    */
}