/**
 * SOFTWATOOLS - Premium Design System
 * La experiencia de usuario más fluida y elegante
 */

/* ============================================
   VARIABLES Y TOKENS DE DISEÑO
   ============================================ */
:root {
    /* Colores primarios - Azul eléctrico vibrante */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;
    
    /* Acento - Violeta */
    --accent-400: #a78bfa;
    --accent-500: #8b5cf6;
    --accent-600: #7c3aed;
    
    /* Grises neutros */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --gray-950: #030712;
    
    /* Estados semánticos */
    --success-50: #ecfdf5;
    --success-500: #10b981;
    --success-600: #059669;
    --warning-50: #fffbeb;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    --error-50: #fef2f2;
    --error-500: #ef4444;
    --error-600: #dc2626;
    --info-50: #eff6ff;
    --info-500: #3b82f6;
    
    /* Tema claro (default) */
    --bg-body: #f8fafc;
    --bg-primary: #ffffff;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    --bg-hover: #f1f5f9;
    --bg-glass: rgba(255, 255, 255, 0.85);
    --bg-glass-strong: rgba(255, 255, 255, 0.95);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    --text-muted: #cbd5e1;
    
    --border-default: #e2e8f0;
    --border-light: #f1f5f9;
    --border-focus: var(--primary-500);
    
    /* Sombras refinadas */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
    --shadow-glow: 0 0 20px rgb(59 130 246 / 0.15);
    --shadow-glow-lg: 0 0 40px rgb(59 130 246 / 0.2);
    --shadow-primary: 0 4px 14px 0 rgb(37 99 235 / 0.35);
    
    /* Espaciado */
    --space-px: 1px;
    --space-0: 0;
    --space-0-5: 0.125rem;
    --space-1: 0.25rem;
    --space-1-5: 0.375rem;
    --space-2: 0.5rem;
    --space-2-5: 0.625rem;
    --space-3: 0.75rem;
    --space-3-5: 0.875rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-7: 1.75rem;
    --space-8: 2rem;
    --space-9: 2.25rem;
    --space-10: 2.5rem;
    --space-11: 2.75rem;
    --space-12: 3rem;
    --space-14: 3.5rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-28: 7rem;
    --space-32: 8rem;
    
    /* Tipografía */
    --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;
    
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    
    --tracking-tighter: -0.05em;
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    
    /* Radios */
    --radius-none: 0;
    --radius-sm: 0.25rem;
    --radius-default: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transiciones suaves */
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    --duration-75: 75ms;
    --duration-100: 100ms;
    --duration-150: 150ms;
    --duration-200: 200ms;
    --duration-300: 300ms;
    --duration-500: 500ms;
    --duration-700: 700ms;
    --duration-1000: 1000ms;
    
    /* Z-index */
    --z-behind: -1;
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-toast: 800;
    --z-max: 9999;
}

/* ============================================
   TEMA OSCURO
   ============================================ */
[data-theme="dark"] {
    --bg-body: #0c0f17;
    --bg-primary: #151922;
    --bg-secondary: #1c212d;
    --bg-tertiary: #252b3b;
    --bg-hover: #1c212d;
    --bg-glass: rgba(21, 25, 34, 0.9);
    --bg-glass-strong: rgba(21, 25, 34, 0.95);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --text-muted: #475569;
    
    --border-default: #2d3548;
    --border-light: #1e2433;
    
    --shadow-glow: 0 0 20px rgb(59 130 246 / 0.2);
    --shadow-glow-lg: 0 0 40px rgb(59 130 246 / 0.25);
}

/* ============================================
   RESET Y BASE
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: var(--bg-body);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    transition: background-color var(--duration-300) var(--ease-in-out),
                color var(--duration-300) var(--ease-in-out);
}

::selection {
    background: var(--primary-500);
    color: white;
}

:focus {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

img, video, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

/* ============================================
   TIPOGRAFÍA
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: var(--leading-tight);
    color: var(--text-primary);
    letter-spacing: var(--tracking-tight);
}

h1 { font-size: clamp(2rem, 5vw, var(--text-5xl)); }
h2 { font-size: clamp(1.5rem, 4vw, var(--text-4xl)); }
h3 { font-size: clamp(1.25rem, 3vw, var(--text-2xl)); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-500) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-balance {
    text-wrap: balance;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: 1280px;
    margin-inline: auto;
    padding-inline: var(--space-4);
}

@media (min-width: 640px) {
    .container { padding-inline: var(--space-6); }
}

@media (min-width: 1024px) {
    .container { padding-inline: var(--space-8); }
}

.container-sm { max-width: 640px; }
.container-md { max-width: 768px; }
.container-lg { max-width: 1024px; }
.container-xl { max-width: 1280px; }
.container-2xl { max-width: 1536px; }

.page-section {
    padding-block: var(--space-16);
}

@media (min-width: 768px) {
    .page-section { padding-block: var(--space-24); }
}

/* ============================================
   HEADER PREMIUM
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--bg-glass);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--border-light);
    transition: all var(--duration-300) var(--ease-out);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: var(--space-4);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 800;
    font-size: var(--text-xl);
    color: var(--text-primary);
    letter-spacing: var(--tracking-tight);
    transition: opacity var(--duration-200) var(--ease-out);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-500) 100%);
    border-radius: var(--radius-xl);
    color: white;
    box-shadow: var(--shadow-primary);
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.2) 100%);
}

.logo-icon svg {
    position: relative;
    width: 22px;
    height: 22px;
}

/* Navegación */
.nav-main {
    display: none;
    align-items: center;
    gap: var(--space-1);
}

@media (min-width: 1024px) {
    .nav-main { display: flex; }
}

.nav-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2-5) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--duration-200) var(--ease-out);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.nav-link.active {
    color: var(--primary-600);
    background: var(--primary-50);
}

[data-theme="dark"] .nav-link.active {
    background: rgb(59 130 246 / 0.1);
}

.nav-link svg {
    width: 18px;
    height: 18px;
    opacity: 0.7;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* Search en Header */
.header-search {
    position: relative;
    display: none;
}

@media (min-width: 768px) {
    .header-search { display: block; }
}

.header-search-input {
    width: 220px;
    padding: var(--space-2-5) var(--space-4);
    padding-left: calc(var(--space-4) + 16px + var(--space-2));
    font-size: var(--text-sm);
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    transition: all var(--duration-200) var(--ease-out);
}

.header-search-input::placeholder {
    color: var(--text-tertiary);
}

.header-search-input:hover {
    background: var(--bg-tertiary);
}

.header-search-input:focus {
    width: 280px;
    background: var(--bg-primary);
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.header-search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-tertiary);
    pointer-events: none;
}

/* ============================================
   BOTONES
   ============================================ */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2-5) var(--space-5);
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    transition: all var(--duration-200) var(--ease-out);
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--duration-200) var(--ease-out);
}

.btn:hover::before {
    opacity: 1;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0) scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Tamaños */
.btn-xs { 
    padding: var(--space-1-5) var(--space-3); 
    font-size: var(--text-xs);
    border-radius: var(--radius-lg);
}
.btn-sm { 
    padding: var(--space-2) var(--space-4); 
    font-size: var(--text-sm); 
}
.btn-lg { 
    padding: var(--space-3-5) var(--space-7); 
    font-size: var(--text-base);
    border-radius: var(--radius-2xl);
}
.btn-xl { 
    padding: var(--space-4) var(--space-8); 
    font-size: var(--text-lg);
    border-radius: var(--radius-2xl);
}

/* Variantes */
.btn-primary {
    color: white;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    border: none;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    box-shadow: 0 6px 20px rgb(37 99 235 / 0.4);
}

.btn-secondary {
    color: var(--primary-600);
    background: var(--primary-50);
    border-color: var(--primary-200);
}

.btn-secondary:hover {
    background: var(--primary-100);
    border-color: var(--primary-300);
}

[data-theme="dark"] .btn-secondary {
    background: rgb(59 130 246 / 0.1);
    border-color: rgb(59 130 246 / 0.2);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
}

.btn-ghost:hover {
    background: var(--bg-hover);
    border-color: var(--border-default);
}

.btn-danger {
    color: white;
    background: linear-gradient(135deg, var(--error-500) 0%, var(--error-600) 100%);
    border: none;
}

.btn-success {
    color: white;
    background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
    border: none;
}

/* Botón icono */
.btn-icon {
    padding: var(--space-2-5);
    width: 42px;
    height: 42px;
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    transition: all var(--duration-300) var(--ease-out);
}

.card-interactive {
    cursor: pointer;
}

.card-interactive:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transform: translateY(-4px);
}

.card-glass {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

/* ============================================
   FORMULARIOS
   ============================================ */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.form-label-optional {
    font-weight: 400;
    color: var(--text-tertiary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: inherit;
    font-size: var(--text-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    transition: all var(--duration-200) var(--ease-out);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
    border-color: var(--gray-400);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* Input con icono */
.input-group {
    position: relative;
}

.input-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-tertiary);
    pointer-events: none;
}

.input-group .form-input {
    padding-left: calc(var(--space-4) + 20px + var(--space-3));
}

/* Error state */
.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--error-500);
}

.form-input.error:focus {
    box-shadow: 0 0 0 3px rgb(239 68 68 / 0.1);
}

.form-error {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--error-500);
}

/* Checkbox y Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
}

.form-check-input {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-500);
    cursor: pointer;
}

/* ============================================
   HERO SECTION ESPECTACULAR
   ============================================ */
.hero {
    position: relative;
    padding: var(--space-20) 0 var(--space-24);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(ellipse 50% 50% at 20% 20%, rgb(59 130 246 / 0.15), transparent 50%),
        radial-gradient(ellipse 50% 50% at 80% 80%, rgb(139 92 246 / 0.1), transparent 50%),
        radial-gradient(ellipse 60% 60% at 50% 50%, rgb(59 130 246 / 0.05), transparent 60%);
    animation: heroGlow 20s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
}

/* Partículas flotantes */
.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--primary-400);
    border-radius: var(--radius-full);
    opacity: 0.4;
    animation: float 15s ease-in-out infinite;
}

.hero-particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; }
.hero-particle:nth-child(2) { left: 20%; top: 80%; animation-delay: 2s; }
.hero-particle:nth-child(3) { left: 60%; top: 10%; animation-delay: 4s; }
.hero-particle:nth-child(4) { left: 80%; top: 60%; animation-delay: 6s; }
.hero-particle:nth-child(5) { left: 40%; top: 50%; animation-delay: 8s; }

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); }
    25% { transform: translateY(-30px) translateX(15px); }
    50% { transform: translateY(-15px) translateX(-10px); }
    75% { transform: translateY(-25px) translateX(5px); }
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1-5) var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-sm);
    animation: fadeInDown 0.6s var(--ease-out);
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success-500);
    border-radius: var(--radius-full);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    letter-spacing: var(--tracking-tighter);
    animation: fadeInUp 0.6s var(--ease-out) 0.1s backwards;
}

.hero-description {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-10);
    line-height: var(--leading-relaxed);
    animation: fadeInUp 0.6s var(--ease-out) 0.2s backwards;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    animation: fadeInUp 0.6s var(--ease-out) 0.3s backwards;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-12);
    margin-top: var(--space-16);
    padding-top: var(--space-10);
    border-top: 1px solid var(--border-light);
    animation: fadeIn 0.6s var(--ease-out) 0.4s backwards;
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--primary-600);
    letter-spacing: var(--tracking-tight);
}

.hero-stat-label {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-top: var(--space-1);
}

/* Animaciones */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

/* ============================================
   CATEGORÍAS
   ============================================ */
.categories-section {
    padding: var(--space-16) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-title {
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-4);
}

.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-6) var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    text-align: center;
    transition: all var(--duration-300) var(--ease-out);
    cursor: pointer;
}

.category-card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transform: translateY(-4px);
}

.category-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-50);
    border-radius: var(--radius-xl);
    color: var(--primary-600);
    margin-bottom: var(--space-4);
    transition: all var(--duration-300) var(--ease-out);
}

[data-theme="dark"] .category-icon {
    background: rgb(59 130 246 / 0.1);
}

.category-card:hover .category-icon {
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
    color: white;
    transform: scale(1.1) rotate(-5deg);
    box-shadow: var(--shadow-primary);
}

.category-icon svg {
    width: 26px;
    height: 26px;
}

.category-name {
    font-weight: 700;
    font-size: var(--text-base);
    margin-bottom: var(--space-1);
}

.category-count {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* ============================================
   TOOL CARDS
   ============================================ */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-5);
}

.tool-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    transition: all var(--duration-300) var(--ease-out);
    cursor: pointer;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-300) var(--ease-out);
}

.tool-card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    transform: translateY(-6px);
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-xl);
    color: white;
    margin-bottom: var(--space-5);
    box-shadow: var(--shadow-md);
    transition: all var(--duration-300) var(--ease-out);
}

.tool-card:hover .tool-card-icon {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: var(--shadow-lg), 0 0 20px rgb(59 130 246 / 0.3);
}

.tool-card-icon svg {
    width: 26px;
    height: 26px;
}

.tool-card-content {
    flex-grow: 1;
}

.tool-card-title {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-2);
    transition: color var(--duration-200);
}

.tool-card:hover .tool-card-title {
    color: var(--primary-600);
}

.tool-card-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

.tool-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-light);
}

.tool-card-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2-5);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-lg);
}

.badge-free {
    background: var(--success-50);
    color: var(--success-600);
}

.badge-credits {
    background: var(--primary-50);
    color: var(--primary-600);
}

[data-theme="dark"] .badge-free {
    background: rgb(16 185 129 / 0.1);
}

[data-theme="dark"] .badge-credits {
    background: rgb(59 130 246 / 0.1);
}

.tool-card-arrow {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    color: var(--text-tertiary);
    transition: all var(--duration-200);
}

.tool-card:hover .tool-card-arrow {
    background: var(--primary-500);
    color: white;
    transform: translateX(4px);
}

.tool-card-arrow svg {
    width: 16px;
    height: 16px;
}

/* Featured card */
.tool-card.featured {
    border-color: var(--primary-200);
    background: linear-gradient(135deg, var(--bg-primary), var(--primary-50));
}

.tool-card.featured::after {
    content: '★ Popular';
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--warning-600);
    background: var(--warning-50);
    border-radius: var(--radius-lg);
}

[data-theme="dark"] .tool-card.featured {
    background: linear-gradient(135deg, var(--bg-primary), rgb(59 130 246 / 0.05));
}

/* ============================================
   TOOL INTERFACE - ZONA DE UPLOAD
   ============================================ */
.tool-page {
    padding: var(--space-10) 0 var(--space-20);
}

.tool-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.tool-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
    border-radius: var(--radius-3xl);
    color: white;
    margin: 0 auto var(--space-6);
    box-shadow: var(--shadow-xl), var(--shadow-glow-lg);
}

.tool-icon svg {
    width: 40px;
    height: 40px;
}

.tool-title {
    margin-bottom: var(--space-3);
}

.tool-description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Upload Zone */
.upload-zone {
    position: relative;
    border: 2px dashed var(--border-default);
    border-radius: var(--radius-3xl);
    padding: var(--space-16);
    text-align: center;
    background: var(--bg-primary);
    transition: all var(--duration-300) var(--ease-out);
    cursor: pointer;
    overflow: hidden;
}

.upload-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgb(59 130 246 / 0.03), rgb(139 92 246 / 0.03));
    opacity: 0;
    transition: opacity var(--duration-300);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary-400);
    border-style: solid;
}

.upload-zone:hover::before,
.upload-zone.dragover::before {
    opacity: 1;
}

.upload-zone.dragover {
    transform: scale(1.01);
    box-shadow: var(--shadow-xl), var(--shadow-glow-lg);
}

.upload-zone-inner {
    position: relative;
    z-index: 1;
}

.upload-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-50);
    border-radius: var(--radius-2xl);
    color: var(--primary-500);
    margin: 0 auto var(--space-5);
    transition: all var(--duration-300) var(--ease-out);
}

[data-theme="dark"] .upload-icon {
    background: rgb(59 130 246 / 0.1);
}

.upload-zone:hover .upload-icon,
.upload-zone.dragover .upload-icon {
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
    color: white;
    transform: scale(1.1);
    box-shadow: var(--shadow-primary);
}

.upload-icon svg {
    width: 36px;
    height: 36px;
}

.upload-title {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.upload-subtitle {
    color: var(--text-tertiary);
    margin-bottom: var(--space-6);
}

.upload-formats {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.upload-format {
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--text-tertiary);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.upload-zone input[type="file"] {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* Files List */
.files-list {
    margin-top: var(--space-6);
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-3);
    animation: slideInUp 0.3s var(--ease-out);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.file-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    color: var(--primary-500);
}

.file-icon svg {
    width: 24px;
    height: 24px;
}

.file-info {
    flex-grow: 1;
    min-width: 0;
}

.file-name {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.file-remove {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    border-radius: var(--radius-lg);
    transition: all var(--duration-200);
    cursor: pointer;
}

.file-remove:hover {
    background: var(--error-50);
    color: var(--error-500);
}

.file-remove svg {
    width: 18px;
    height: 18px;
}

/* Opciones de herramienta */
.tool-options {
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    margin-top: var(--space-6);
}

.tool-options-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.tool-options-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
}

.tool-options-icon svg {
    width: 20px;
    height: 20px;
}

.tool-options-title {
    font-size: var(--text-lg);
    font-weight: 700;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-5);
}

/* Botón de proceso */
.process-section {
    text-align: center;
    margin-top: var(--space-8);
}

.btn-process {
    min-width: 200px;
}

/* Progress */
.progress-container {
    margin-top: var(--space-8);
    padding: var(--space-6);
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    display: none;
}

.progress-container.active {
    display: block;
    animation: fadeIn 0.3s var(--ease-out);
}

.progress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.progress-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 600;
}

.progress-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-default);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.progress-percentage {
    font-weight: 700;
    color: var(--primary-600);
}

.progress-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
    border-radius: var(--radius-full);
    transition: width var(--duration-300) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.progress-bar-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255,255,255,0.3),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-status {
    margin-top: var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    text-align: center;
}

/* Results */
.results-section {
    margin-top: var(--space-8);
    display: none;
}

.results-section.active {
    display: block;
    animation: fadeIn 0.5s var(--ease-out);
}

.result-card {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-6);
    background: var(--success-50);
    border: 1px solid var(--success-500);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-4);
}

[data-theme="dark"] .result-card {
    background: rgb(16 185 129 / 0.1);
}

.result-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--success-500);
    border-radius: var(--radius-xl);
    color: white;
    flex-shrink: 0;
}

.result-icon svg {
    width: 32px;
    height: 32px;
}

.result-info {
    flex-grow: 1;
    min-width: 0;
}

.result-title {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.result-meta {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.result-actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-default);
    padding: var(--space-16) 0 var(--space-8);
    margin-top: var(--space-20);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        text-align: center;
    }
}

.footer-brand {
    max-width: 300px;
}

@media (max-width: 768px) {
    .footer-brand {
        max-width: none;
        margin: 0 auto;
    }
}

.footer-brand .logo {
    margin-bottom: var(--space-4);
}

@media (max-width: 768px) {
    .footer-brand .logo {
        justify-content: center;
    }
}

.footer-brand p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

.footer-title {
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    transition: color var(--duration-200);
}

.footer-links a:hover {
    color: var(--primary-500);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-light);
}

@media (max-width: 768px) {
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

.footer-copyright {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.footer-credits a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    transition: color var(--duration-200);
}

.footer-credits a:hover {
    color: var(--primary-500);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    pointer-events: none;
}

@media (max-width: 480px) {
    .toast-container {
        left: var(--space-4);
        right: var(--space-4);
        bottom: var(--space-4);
    }
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    min-width: 320px;
    max-width: 420px;
    padding: var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    pointer-events: auto;
    animation: toastIn 0.4s var(--ease-spring);
}

@media (max-width: 480px) {
    .toast {
        min-width: auto;
        max-width: none;
    }
}

.toast.removing {
    animation: toastOut 0.3s var(--ease-in) forwards;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(100%) scale(0.8);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes toastOut {
    to {
        opacity: 0;
        transform: translateX(100%) scale(0.8);
    }
}

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.toast-success .toast-icon { color: var(--success-500); }
.toast-error .toast-icon { color: var(--error-500); }
.toast-warning .toast-icon { color: var(--warning-500); }
.toast-info .toast-icon { color: var(--info-500); }

.toast-content {
    flex-grow: 1;
    min-width: 0;
}

.toast-title {
    font-weight: 600;
    margin-bottom: var(--space-0-5);
}

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

.toast-close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    border-radius: var(--radius-md);
    cursor: pointer;
    flex-shrink: 0;
    transition: all var(--duration-150);
}

.toast-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.toast-close svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   MODAL
   ============================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgb(0 0 0 / 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-300) var(--ease-out);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 100%;
    max-width: 500px;
    max-height: calc(100vh - var(--space-8));
    background: var(--bg-primary);
    border-radius: var(--radius-3xl);
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--duration-300) var(--ease-spring);
}

.modal-backdrop.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--border-light);
}

.modal-title {
    font-size: var(--text-lg);
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--duration-150);
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--space-6);
    overflow-y: auto;
    max-height: calc(100vh - 200px);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-6);
    border-top: 1px solid var(--border-light);
}

/* ============================================
   DARK MODE TOGGLE
   ============================================ */
.theme-toggle {
    position: relative;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-200);
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    transition: all var(--duration-300) var(--ease-spring);
}

.theme-toggle .icon-sun {
    position: absolute;
    transform: rotate(90deg) scale(0);
    opacity: 0;
}

.theme-toggle .icon-moon {
    transform: rotate(0) scale(1);
    opacity: 1;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    transform: rotate(0) scale(1);
    opacity: 1;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    transform: rotate(-90deg) scale(0);
    opacity: 0;
}

/* ============================================
   USER MENU
   ============================================ */
.user-menu {
    position: relative;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1-5);
    padding-right: var(--space-3);
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--duration-200);
}

.user-menu-trigger:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-default);
}

.user-avatar {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
    border-radius: var(--radius-full);
    color: white;
    font-weight: 700;
    font-size: var(--text-sm);
}

.user-name {
    font-size: var(--text-sm);
    font-weight: 600;
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

@media (max-width: 640px) {
    .user-name { display: none; }
    .user-menu-trigger { padding-right: var(--space-1-5); }
}

.user-dropdown {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    min-width: 240px;
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all var(--duration-200) var(--ease-out);
    z-index: var(--z-dropdown);
}

.user-menu.open .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.user-dropdown-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-light);
}

.user-dropdown-name {
    font-weight: 700;
}

.user-dropdown-email {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-top: var(--space-0-5);
}

.user-dropdown-credits {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-3);
    padding: var(--space-2) var(--space-3);
    background: linear-gradient(135deg, var(--primary-50), var(--accent-400)/0.1);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--primary-600);
}

[data-theme="dark"] .user-dropdown-credits {
    background: linear-gradient(135deg, rgb(59 130 246 / 0.1), rgb(139 92 246 / 0.1));
}

.user-dropdown-credits svg {
    width: 16px;
    height: 16px;
}

.user-dropdown-menu {
    padding: var(--space-2);
}

.user-dropdown-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--duration-150);
}

.user-dropdown-link:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.user-dropdown-link svg {
    width: 18px;
    height: 18px;
}

.user-dropdown-link.danger {
    color: var(--error-500);
}

.user-dropdown-link.danger:hover {
    background: var(--error-50);
}

.user-dropdown-divider {
    height: 1px;
    background: var(--border-light);
    margin: var(--space-2);
}

/* ============================================
   MOBILE MENU
   ============================================ */
.mobile-menu-btn {
    display: flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    cursor: pointer;
}

@media (min-width: 1024px) {
    .mobile-menu-btn { display: none; }
}

.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: var(--z-modal);
    padding: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--duration-300) var(--ease-out);
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-8);
}

.mobile-menu-close {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    cursor: pointer;
}

.mobile-menu-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.mobile-menu-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--text-primary);
    border-radius: var(--radius-xl);
    transition: background var(--duration-150);
}

.mobile-menu-link:hover {
    background: var(--bg-secondary);
}

.mobile-menu-link svg {
    width: 22px;
    height: 22px;
    color: var(--text-tertiary);
}

.mobile-menu-divider {
    height: 1px;
    background: var(--border-light);
    margin: var(--space-4) 0;
}

.mobile-menu-footer {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-light);
}

/* ============================================
   CREDITS BADGE
   ============================================ */
.credits-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1-5);
    padding: var(--space-1-5) var(--space-3);
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
    border-radius: var(--radius-full);
    color: white;
    font-size: var(--text-sm);
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.credits-badge svg {
    width: 14px;
    height: 14px;
}

/* ============================================
   SKELETON LOADERS
   ============================================ */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 0%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 100%
    );
    background-size: 200% 100%;
    animation: skeleton 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1em;
    margin-bottom: var(--space-2);
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: var(--space-4);
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
}

.skeleton-card {
    height: 200px;
    border-radius: var(--radius-2xl);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .hero {
        padding: var(--space-12) 0 var(--space-16);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-6);
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .upload-zone {
        padding: var(--space-10);
    }
    
    .result-card {
        flex-direction: column;
        text-align: center;
    }
    
    .result-actions {
        width: 100%;
        flex-direction: column;
    }
    
    .result-actions .btn {
        width: 100%;
    }
}

/* ============================================
   UTILIDADES
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.py-4 { padding-block: var(--space-4); }
.px-4 { padding-inline: var(--space-4); }

.rounded { border-radius: var(--radius-default); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.hidden { display: none; }
.block { display: block; }
.inline-flex { display: inline-flex; }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.animate-fade-in { animation: fadeIn 0.5s var(--ease-out); }
.animate-fade-up { animation: fadeInUp 0.5s var(--ease-out); }
.animate-bounce { animation: bounce 1s ease infinite; }

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Stagger animations */
.stagger > * {
    opacity: 0;
    animation: fadeInUp 0.5s var(--ease-out) forwards;
}

.stagger > *:nth-child(1) { animation-delay: 0.05s; }
.stagger > *:nth-child(2) { animation-delay: 0.1s; }
.stagger > *:nth-child(3) { animation-delay: 0.15s; }
.stagger > *:nth-child(4) { animation-delay: 0.2s; }
.stagger > *:nth-child(5) { animation-delay: 0.25s; }
.stagger > *:nth-child(6) { animation-delay: 0.3s; }
.stagger > *:nth-child(7) { animation-delay: 0.35s; }
.stagger > *:nth-child(8) { animation-delay: 0.4s; }

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

/* Print */
@media print {
    .no-print { display: none !important; }
    body { background: white; }
    .header, .footer { display: none; }
}