/* ===== RESPONSIVE DESIGN ===== */

/* Tablets (768px y menos) */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Header */
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .language-selector {
        order: -1;
    }
    
    /* Hero */
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    /* PDF Editor */
    .editor-layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .editor-tools {
        order: 2;
    }
    
    .pdf-viewer {
        order: 1;
    }
    
    .properties-panel {
        order: 3;
    }
    
    /* Features */
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* How It Works */
    .steps-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    /* Sidebar Ad */
    .sidebar-ad {
        position: static;
        transform: none;
        margin: var(--spacing-lg) 0;
    }
    
    /* Typography */
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
    
    /* Spacing */
    .hero,
    .upload-area,
    .pdf-editor,
    .features,
    .how-it-works,
    .faq {
        padding: var(--spacing-xl) 0;
    }
}

/* Mobile (480px y menos) */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    /* Header */
    .logo {
        font-size: 1.25rem;
    }
    
    .logo i {
        font-size: 1.5rem;
    }
    
    .language-selector {
        gap: var(--spacing-xs);
    }
    
    .lang-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .lang-btn img {
        width: 16px;
        height: 12px;
    }
    
    /* Hero */
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .hero-description {
        font-size: 0.9rem;
    }
    
    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }
    
    /* Upload Area */
    .upload-zone {
        padding: var(--spacing-lg);
    }
    
    .upload-content i {
        font-size: 3rem;
    }
    
    /* PDF Editor */
    .editor-tools {
        padding: var(--spacing-md);
    }
    
    .tool-btn {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .pdf-viewer {
        padding: var(--spacing-md);
    }
    
    .pdf-controls {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .properties-panel {
        padding: var(--spacing-md);
    }
    
    /* Features */
    .feature-card {
        padding: var(--spacing-lg);
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
    }
    
    .feature-icon i {
        font-size: 1.5rem;
    }
    
    /* FAQ */
    .faq-question {
        padding: var(--spacing-md);
    }
    
    .faq-question h3 {
        font-size: 1rem;
    }
    
    /* Typography */
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.125rem; }
    h4 { font-size: 1rem; }
    
    /* Spacing */
    .hero,
    .upload-area,
    .pdf-editor,
    .features,
    .how-it-works,
    .faq {
        padding: var(--spacing-lg) 0;
    }
    
    .section-header {
        margin-bottom: var(--spacing-lg);
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
}

/* Small Mobile (320px y menos) */
@media (max-width: 320px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    /* Hero */
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .hero-description {
        font-size: 0.875rem;
    }
    
    /* Buttons */
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }
    
    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.9rem;
    }
    
    /* Upload */
    .upload-zone {
        padding: var(--spacing-md);
    }
    
    .upload-content i {
        font-size: 2.5rem;
    }
    
    /* Typography */
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1rem; }
    
    /* Spacing */
    .hero,
    .upload-area,
    .pdf-editor,
    .features,
    .how-it-works,
    .faq {
        padding: var(--spacing-md) 0;
    }
}

/* Landscape Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero h1 {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .hero-description {
        font-size: 0.9rem;
        margin-bottom: var(--spacing-md);
    }
    
    .upload-area,
    .pdf-editor,
    .features,
    .how-it-works,
    .faq {
        padding: var(--spacing-md) 0;
    }
}

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

/* Print Styles */
@media print {
    .header,
    .hero-actions,
    .upload-area,
    .editor-tools,
    .properties-panel,
    .features,
    .how-it-works,
    .faq,
    .footer,
    .ad-banner {
        display: none !important;
    }
    
    .pdf-viewer {
        box-shadow: none;
        border: none;
    }
    
    #pdfCanvas {
        border: none;
    }
    
    body {
        background: white;
        color: black;
    }
}

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

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #1a1a1a;
        --background-light: #2d2d2d;
        --text-color: #ffffff;
        --text-light: #cccccc;
        --border-color: #404040;
        --shadow-color: rgba(0, 0, 0, 0.3);
    }
    
    .btn-secondary {
        background-color: var(--background-light);
        border-color: var(--border-color);
        color: var(--text-color);
    }
    
    .btn-secondary:hover {
        background-color: var(--border-color);
    }
    
    .upload-zone {
        background-color: var(--background-light);
    }
    
    .feature-card {
        background-color: var(--background-light);
        border-color: var(--border-color);
    }
    
    .faq-question {
        background-color: var(--background-light);
    }
    
    .ad-banner {
        background-color: var(--background-light);
        border-color: var(--border-color);
    }
}

/* Focus Styles for Accessibility */
.btn:focus,
.tool-btn:focus,
.control-btn:focus,
.lang-btn:focus,
.faq-question:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --text-color: #000000;
        --border-color: #000000;
        --shadow-color: rgba(0, 0, 0, 0.5);
    }
    
    .btn-primary {
        background-color: #000000;
        color: #ffffff;
    }
    
    .btn-secondary {
        background-color: #ffffff;
        color: #000000;
        border: 2px solid #000000;
    }
}

/* Large Screens (1200px y más) */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .hero h1 {
        font-size: 3.5rem;
    }
    
    .hero-description {
        font-size: 1.3rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Ultra Wide Screens (1600px y más) */
@media (min-width: 1600px) {
    .container {
        max-width: 1600px;
    }
    
    .hero h1 {
        font-size: 4rem;
    }
    
    .section-header h2 {
        font-size: 3rem;
    }
    
    .editor-layout {
        grid-template-columns: 300px 1fr 350px;
    }
}