/* ==========================================================================
   Variables & Configuración Base
   ========================================================================== */
   :root {
    /* Paleta de Colores Corporativa */
    --primary: #2563EB;
    --primary-dark: #1E40AF;
    --primary-light: #EFF6FF;
    
    --bg-main: #F8FAFC;
    --bg-card: #FFFFFF;
    
    --text-main: #0F172A;
    --text-muted: #64748B;
    --border-color: #E2E8F0;

    /* Colores por Categoría */
    --color-blue: #3B82F6;
    --color-purple: #8B5CF6;
    --color-emerald: #10B981;
    --color-orange: #F59E0B;
    --color-indigo: #6366F1;
    --color-slate: #475569;
    --color-red: #EF4444;

    /* Tipografía */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Efectos & Espaciados */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-hover: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==========================================================================
   Utilidades y Botones
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background-color: var(--primary-light);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--bg-main);
    color: var(--text-muted);
    transition: var(--transition);
}

.btn-icon:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

/* Colores Dinámicos */
.bg-blue { background-color: #EFF6FF; color: var(--color-blue); }
.bg-purple { background-color: #F5F3FF; color: var(--color-purple); }
.bg-emerald { background-color: #ECFDF5; color: var(--color-emerald); }
.bg-orange { background-color: #FFFBEB; color: var(--color-orange); }
.bg-indigo { background-color: #EEF2FF; color: var(--color-indigo); }
.bg-slate { background-color: #F8FAFC; color: var(--color-slate); }

.text-red { color: var(--color-red); }
.text-blue { color: var(--color-blue); }
.text-orange { color: var(--color-orange); }

/* ==========================================================================
   Header
   ========================================================================== */
.header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--primary);
    background: var(--primary-light);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

.main-nav {
    display: none;
    gap: 2rem;
}

@media (min-width: 768px) {
    .main-nav {
        display: flex;
    }
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -24px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
    border-radius: 2px 2px 0 0;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    background: linear-gradient(180deg, #FFFFFF 0%, var(--bg-main) 100%);
    padding: 4rem 0 3rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.hero-icon {
    font-size: 2.5rem;
    color: var(--primary);
    background-color: var(--primary-light);
    width: 80px;
    height: 80px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.15);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    color: var(--text-main);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3.5rem;
    }
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* ==========================================================================
   Main Layout & Toolbar
   ========================================================================== */
.main-layout {
    padding-top: 2rem;
    padding-bottom: 4rem;
}

.toolbar {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

.search-box {
    position: relative;
    width: 100%;
    max-width: 600px;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background-color: var(--bg-card);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-main);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.section {
    margin-bottom: 3rem;
}

.section-header {
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-main);
}

/* ==========================================================================
   Cards de Carpetas
   ========================================================================== */
.grid-folders {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.folder-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.folder-card:hover {
    box-shadow: var(--shadow-hover);
    border-color: #BFDBFE;
    transform: translateY(-2px);
}

.folder-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.folder-info {
    flex-grow: 1;
}

.folder-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.folder-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.folder-meta {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    background-color: var(--bg-main);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.folder-action {
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary);
    opacity: 0;
    transform: translateX(-10px);
    transition: var(--transition);
}

.folder-card:hover .folder-action {
    opacity: 1;
    transform: translateX(0);
}

/* ==========================================================================
   Archivos Recientes (Listado)
   ========================================================================== */
.list-files {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.file-row {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: var(--transition);
}

.file-row:hover {
    box-shadow: var(--shadow-sm);
    border-color: #CBD5E1;
}

.file-icon {
    font-size: 1.5rem;
}

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

.file-name {
    font-size: 1rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.15rem;
}

.file-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.file-type {
    display: none;
    font-size: 0.85rem;
    color: var(--text-muted);
}

@media (min-width: 768px) {
    .file-type {
        display: block;
        width: 150px;
    }
}

.file-download {
    margin-left: auto;
}

/* ==========================================================================
   Estadísticas
   ========================================================================== */
.stats {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 1.5rem;
    margin-top: 4rem;
}

@media (min-width: 640px) {
    .stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

/* ==========================================================================
   Estados y Utilidades JS
   ========================================================================== */
.hidden {
    display: none !important;
}

.no-results {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-muted);
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--border-color);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr;
    }
}

.footer-info p {
    color: var(--text-muted);
    margin-top: 1rem;
    max-width: 400px;
}

.footer-links h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}