/* ===================================
   SISTEMA DE DISEÑO STAYARTS.COM
   Convertidor PDF a JPG/PNG
   =================================== */

/* Reset y Variables CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colores Modo Oscuro (Predeterminado) */
    --bg-primary: #0d0d0d;
    --bg-secondary: #1a1a1a;
    --bg-card: #141414;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --accent-color: #7e22ce;
    --accent-gradient: linear-gradient(135deg, #6b21a8 0%, #7e22ce 50%, #6b21a8 100%);
    --border-color: #262626;
    --hover-bg: #1f1f1f;
    --success-color: #10b981;
    --danger-color: #ef4444;
    
    /* Espaciado */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 30px;
    --spacing-2xl: 40px;
    --spacing-3xl: 50px;
    
    /* Bordes */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 50px;
    
    /* Transiciones */
    --transition: all 0.3s ease;
}

/* Modo Claro */
body.light-mode {
    --bg-primary: #f9fafb;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --hover-bg: #f3f4f6;
}

/* Body */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: var(--transition);
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Card Principal */
.card {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7);
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   CONTROLES FIJOS
   =================================== */

.fixed-controls {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 1000;
}

.theme-toggle,
.language-btn {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: 10px 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.theme-toggle:hover,
.language-btn:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(126, 34, 206, 0.3);
}

.theme-icon,
.language-icon {
    font-size: 1.2rem;
}

/* Language Selector */
.language-selector {
    position: relative;
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    min-width: 150px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
}

.language-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.language-option:last-child {
    border-bottom: none;
}

.language-option:hover {
    background: var(--hover-bg);
}

.language-option.active {
    background: var(--accent-gradient);
    color: white;
}

.language-option .flag {
    font-size: 1.3rem;
}

/* ===================================
   HEADER
   =================================== */

.header {
    text-align: center;
    padding: 60px var(--spacing-xl) 50px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f1419 100%);
    color: white;
    position: relative;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(126, 34, 206, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 1;
}

.logo {
    display: inline-block;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: white;
    text-decoration: none;
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
}

.logo:hover {
    color: var(--accent-color);
    transform: scale(1.05);
}

.header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
    margin-bottom: var(--spacing-lg);
}

.format-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.badge {
    background: rgba(126, 34, 206, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(126, 34, 206, 0.4);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
}

.arrow {
    font-size: 1.5rem;
    opacity: 0.7;
}

/* ===================================
   SECCIÓN PRINCIPAL
   =================================== */

.main-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* Upload Section */
.upload-section {
    padding: var(--spacing-3xl) var(--spacing-xl);
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3xl) var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--accent-color);
    background: var(--hover-bg);
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: var(--accent-color);
    background: var(--hover-bg);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.upload-area h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.upload-area p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.file-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg) !important;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(126, 34, 206, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(126, 34, 206, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

.btn-secondary:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-1px);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Config Section */
.config-section {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.config-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.config-item label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.config-item select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    background: var(--bg-card);
    color: var(--text-primary);
    transition: var(--transition);
}

.config-item select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(126, 34, 206, 0.1);
}

/* Progress Section */
.progress-section {
    padding: var(--spacing-3xl) var(--spacing-xl);
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.progress-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: var(--radius-sm);
}

.progress-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Results Section */
.results-section {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.results-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.results-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Thumbnails Grid */
.thumbnails-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.thumbnail-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.thumbnail-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(126, 34, 206, 0.15);
    border-color: var(--accent-color);
}

.thumbnail-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}

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

.thumbnail-title {
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.thumbnail-size {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.thumbnail-download {
    width: 100%;
    padding: 8px;
    font-size: 0.85rem;
}

/* File Info Section */
.file-info-section {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.file-details h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.info-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.info-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* ===================================
   SECCIONES DE CONTENIDO
   =================================== */

.features-section,
.steps-section,
.faq-section,
.disclaimer-section {
    margin: var(--spacing-xl) 0;
}

.features-section h2,
.steps-section h2,
.faq-section h2,
.disclaimer-section h2 {
    font-size: 1.8rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(126, 34, 206, 0.15);
    border-color: var(--accent-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    align-items: center;
}

.step-item {
    text-align: center;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
    box-shadow: 0 4px 14px 0 rgba(126, 34, 206, 0.3);
    transition: var(--transition);
}

.step-item:hover .step-number {
    transform: scale(1.1);
    box-shadow: 0 6px 20px 0 rgba(126, 34, 206, 0.4);
}

.step-item h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.step-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.step-arrow {
    font-size: 2rem;
    color: var(--accent-color);
    text-align: center;
}

/* FAQ Container */
.faq-container {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--accent-color);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    cursor: pointer;
    user-select: none;
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--accent-color);
    transition: var(--transition);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Disclaimer Section */
.disclaimer-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.disclaimer-highlight {
    background: var(--success-color);
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.disclaimer-grid {
    color: var(--text-secondary);
    line-height: 1.8;
}

.disclaimer-grid p {
    margin-bottom: var(--spacing-md);
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    text-align: center;
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.footer-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-content a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.footer-content a:hover {
    color: var(--text-primary);
}

/* ===================================
   MODAL
   =================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: var(--spacing-lg);
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--danger-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--border-color);
}

.modal-body {
    padding: var(--spacing-lg) var(--spacing-xl);
}

.modal-body p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-footer {
    padding: var(--spacing-md) var(--spacing-xl) var(--spacing-lg);
    text-align: right;
}

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

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
    
    .fixed-controls {
        top: var(--spacing-md);
        right: var(--spacing-md);
        gap: 8px;
    }
    
    .theme-text,
    .language-text {
        display: none;
    }
    
    .theme-toggle,
    .language-btn {
        padding: 8px 14px;
    }
    
    .header {
        padding: 40px var(--spacing-lg) 35px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .upload-area {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .config-grid {
        grid-template-columns: 1fr;
    }
    
    .results-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .results-actions {
        flex-direction: column;
    }
    
    .thumbnails-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .step-arrow {
        display: none;
    }
    
    .steps-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.6rem;
    }
    
    .upload-icon {
        font-size: 2rem;
    }
    
    .thumbnails-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   ANIMACIONES ADICIONALES
   =================================== */

.fade-in {
    animation: fadeIn 0.5s ease;
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}