/* =========================================================
   VARIABLES Y CONFIGURACIÓN BASE
   ========================================================= */
:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --bg: #f8fafc;
    --surface: #ffffff;
    --dark: #0f172a;
    --dark-hover: #1e293b;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --text: #334155;
    --text-heading: #0f172a;
    --light: #64748b;
    --folder: #f59e0b;
    --pdf: #ef4444;
    --success: #10b981;
    --success-hover: #059669;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 20px 40px rgba(15, 23, 42, 0.12);
    
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

body {
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* =========================================================
   SISTEMA DE VISTAS
   ========================================================= */
.view {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    min-height: 100vh;
    width: 100%;
}

.view.active {
    display: flex;
    opacity: 1;
}

/* =========================================================
   VISTA: LOGIN
   ========================================================= */
#login-view {
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: radial-gradient(circle at top right, #1e293b, #0f172a);
}

.login-card {
    width: 100%;
    max-width: 440px;
    background: var(--surface);
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.login-logo {
    width: 80px;
    height: 80px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    margin: 0 auto 18px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.2rem;
}

.login-card h2 {
    color: var(--text-heading);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.login-subtitle {
    color: var(--light);
    font-size: 0.9rem;
    margin-bottom: 25px;
}

.input-group {
    position: relative;
    margin-bottom: 16px;
}

.input-group i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light);
    font-size: 1rem;
    pointer-events: none;
    transition: var(--transition);
}

.input-group input {
    width: 100%;
    padding: 14px 16px 14px 44px;
    border: 1px solid var(--border);
    background: #f8fafc;
    border-radius: var(--radius-md);
    outline: none;
    font-size: 0.95rem;
    color: var(--text-heading);
    transition: var(--transition);
}

.input-group input:focus {
    background: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.input-group input:focus + i,
.input-group input:focus ~ i {
    color: var(--primary);
}

.error-text {
    display: none;
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 18px;
    font-size: 0.88rem;
    font-weight: 500;
    align-items: center;
    gap: 8px;
    text-align: left;
}

.btn-primary {
    width: 100%;
    padding: 14px 20px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--primary);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:active {
    transform: translateY(0);
}

.login-footer-text {
    margin-top: 25px;
    font-size: 0.82rem;
    color: var(--light);
}

/* =========================================================
   VISTA: DASHBOARD
   ========================================================= */
#dashboard-view {
    flex-direction: row;
    height: 100vh;
    overflow: hidden;
}

/* --- Sidebar --- */
.sidebar {
    width: 280px;
    background: var(--dark);
    color: white;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    z-index: 50;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-brand i {
    font-size: 1.6rem;
    color: var(--primary);
}

.sidebar-brand h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
}

.sidebar-brand span {
    font-size: 0.78rem;
    color: #94a3b8;
    display: block;
}

.btn-sidebar-close {
    display: none;
    background: transparent;
    border: none;
    color: #94a3b8;
    font-size: 1.25rem;
    cursor: pointer;
}

.sidebar-menu {
    list-style: none;
    padding: 16px 12px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sidebar-menu li {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 14px;
    color: #94a3b8;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.sidebar-menu li i {
    font-size: 1.1rem;
}

.sidebar-menu li:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #ffffff;
}

.sidebar-menu li.active {
    background: var(--primary);
    color: #ffffff;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-logout {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-md);
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.btn-logout:hover {
    background: var(--pdf);
    color: white;
    border-color: var(--pdf);
}

/* --- Contenido Principal y Topbar --- */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    min-width: 0;
    overflow: hidden;
}

.topbar {
    background: var(--surface);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    z-index: 10;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-menu-toggle {
    display: none;
    background: #f1f5f9;
    border: 1px solid var(--border);
    color: var(--text-heading);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
}

.btn-back {
    background: #f1f5f9;
    color: var(--text-heading);
    border: 1px solid var(--border);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-back:hover {
    background: #e2e8f0;
    transform: translateX(-2px);
}

.search-container {
    flex: 1;
    max-width: 480px;
    position: relative;
}

.search-container i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light);
    pointer-events: none;
}

.search-container input {
    width: 100%;
    padding: 10px 14px 10px 40px;
    border: 1px solid var(--border);
    background: #f8fafc;
    border-radius: var(--radius-md);
    outline: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.search-container input:focus {
    background: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* --- Workspace y Navegación --- */
.workspace {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.breadcrumbs {
    margin-bottom: 20px;
    color: var(--light);
    font-size: 0.92rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumbs i {
    color: var(--primary);
}

/* --- Grid y Cards --- */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.item-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.item-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #cbd5e1;
}

.item-header {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.item-header i.fa-folder {
    font-size: 2.4rem;
    color: var(--folder);
    flex-shrink: 0;
}

.item-header i.fa-file-pdf {
    font-size: 2.4rem;
    color: var(--pdf);
    flex-shrink: 0;
}

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

/* Título completo sin cortes */
.item-title {
    font-weight: 600;
    color: var(--text-heading);
    font-size: 0.98rem;
    line-height: 1.4;
    word-break: break-word;
}

.item-meta {
    color: var(--light);
    margin-top: 4px;
    font-size: 0.82rem;
}

.file-actions {
    display: flex;
    gap: 10px;
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--border-light);
}

.btn-action {
    flex: 1;
    border: none;
    padding: 9px 12px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

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

.btn-view:hover {
    background: var(--primary);
    color: white;
}

.btn-download {
    background: #ecfdf5;
    color: var(--success);
}

.btn-download:hover {
    background: var(--success);
    color: white;
}

/* --- Estados de Carga --- */
.loading-box {
    grid-column: 1 / -1;
    padding: 60px 20px;
    text-align: center;
    color: var(--light);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.loading-box i {
    font-size: 2.5rem;
    color: var(--primary);
}

.loading-box span {
    font-size: 1rem;
    font-weight: 500;
}

/* --- Módulo En Construcción --- */
.construction-box {
    display: none;
    background: var(--surface);
    border: 1px dashed #cbd5e1;
    border-radius: var(--radius-lg);
    padding: 60px 24px;
    text-align: center;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.construction-icon {
    width: 90px;
    height: 90px;
    background: var(--warning-light);
    color: var(--warning);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.construction-box h3 {
    color: var(--text-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.construction-box p {
    color: var(--light);
    font-size: 0.95rem;
    max-width: 480px;
    line-height: 1.6;
    margin-bottom: 22px;
}

.construction-badge {
    background: #f1f5f9;
    color: #475569;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* --- Estadísticas --- */
#stats-container {
    display: none;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.chart-box {
    background: var(--surface);
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.chart-header h4 {
    color: var(--text-heading);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.chart-wrapper {
    position: relative;
    height: 320px;
    width: 100%;
}

/* =========================================================
   RESPONSIVIDAD (MÓVIL Y TABLET)
   ========================================================= */
@media (max-width: 992px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.5);
        backdrop-filter: blur(2px);
        z-index: 40;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .btn-sidebar-close,
    .btn-menu-toggle {
        display: flex;
    }
}

@media (max-width: 768px) {
    .topbar {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        padding: 14px 16px;
    }
    
    .topbar-left {
        justify-content: space-between;
    }
    
    .search-container {
        max-width: 100%;
    }
    
    .workspace {
        padding: 16px;
    }
    
    .grid-layout {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    
    #stats-container {
        grid-template-columns: 1fr;
    }
}