/* ===========================================
   SISTEMA VERDULERÍA PRO - CSS CORE
   Diseño moderno y optimizado para rendimiento
   =========================================== */

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

:root {
    /* Paleta de Colores Moderna */
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-200: #bae6fd;
    --primary-300: #7dd3fc;
    --primary-400: #38bdf8;
    --primary-500: #0ea5e9;
    --primary-600: #0284c7;
    --primary-700: #0369a1;
    --primary-800: #075985;
    --primary-900: #0c4a6e;

    /* Escala de Grises Moderna */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e0;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Colores Semánticos */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* Espaciado y Dimensiones */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Bordes y Sombras */
    --border-radius: 0.75rem;
    --border-radius-sm: 0.5rem;
    --border-radius-lg: 1rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transiciones */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Tipografía Moderna */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--gray-800);
    background-color: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout Principal */
.system-layout {
    display: flex;
    min-height: 100vh;
}

.system-main {
    flex: 1;
    margin-left: 0;
    transition: margin-left var(--transition-normal);
}

.system-sidebar.show ~ .system-main {
    margin-left: 280px;
}

/* ===================
   SIDEBAR MODERNO
   =================== */

.system-sidebar {
    position: fixed;
    top: 0;
    left: -280px; /* OCULTO POR DEFECTO */
    width: 280px;
    height: 100vh;
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-800) 100%);
    color: white;
    transition: left var(--transition-normal);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-xl);
    overflow-y: auto;
    overflow-x: hidden;
}

/* ===================
   LAYOUT DASHBOARD
   =================== */

.dashboard-layout {
    min-height: 100vh;
    background: var(--gray-50);
}

.main-content {
    margin-left: 280px;
    min-height: 100vh;
    background: white;
}

/* Sidebar base styles */
.system-sidebar {
    transition: left var(--transition-normal);
}

.system-main {
    transition: margin-left var(--transition-normal);
}

/* Menu buttons */
.menu-open-btn {
    display: block;
}

.menu-close-btn {
    display: none;
}

.system-sidebar.show .menu-close-btn {
    display: block;
}

.system-sidebar.show ~ .dashboard-layout .menu-open-btn {
    display: none;
}

.system-sidebar::-webkit-scrollbar {
    width: 6px;
}

.system-sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

.system-sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

/* Header del Sidebar */
.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.125rem;
    font-weight: 700;
}

.sidebar-brand i {
    font-size: 1.5rem;
    color: var(--primary-200);
}

/* Selector de Tema */
.theme-selector {
    display: flex;
    gap: var(--spacing-xs);
}

.theme-btn {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-xs);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.theme-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: scale(1.1);
}

.theme-btn.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Menú de Navegación */
.sidebar-menu {
    padding: var(--spacing-lg) 0;
}

.menu-section {
    margin-bottom: var(--spacing-lg);
}

.menu-header {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.6);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.menu-item {
    margin: 0 var(--spacing-sm);
}

.menu-item a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    position: relative;
}

.menu-item a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateX(4px);
}

.menu-item.active a {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    box-shadow: var(--shadow-md);
}

.menu-item a i {
    font-size: 1.125rem;
    width: 20px;
    text-align: center;
}

/* Submenu */
.submenu {
    display: none;
    margin-left: var(--spacing-xl);
    margin-top: var(--spacing-xs);
}

.menu-item.active .submenu {
    display: block;
}

.submenu a {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7) !important;
    background: rgba(255, 255, 255, 0.05) !important;
}

.submenu a:hover {
    color: white !important;
    background: rgba(255, 255, 255, 0.1) !important;
}

.submenu a.active {
    color: white !important;
    background: rgba(255, 255, 255, 0.15) !important;
}

/* Footer del Sidebar */
.sidebar-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.user-info i {
    font-size: 1.25rem;
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #fecaca;
}

/* ===================
   TOPBAR MODERNA
   =================== */

.system-topbar {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.topbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-xl);
    max-width: 100%;
}

/* Botón menú móvil */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--gray-600);
    font-size: 1.25rem;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.menu-toggle:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

/* Breadcrumb */
.breadcrumb-nav {
    flex: 1;
    margin: 0 var(--spacing-xl);
}

.breadcrumb {
    background: none;
    padding: 0;
    margin: 0;
}

.breadcrumb-item a {
    color: var(--gray-500);
    text-decoration: none;
}

.breadcrumb-item.active {
    color: var(--gray-800);
    font-weight: 500;
}

/* Acciones del topbar */
.topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.topbar-actions .btn-link {
    color: var(--gray-600);
    text-decoration: none;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.topbar-actions .btn-link:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

/* ===================
   CONTENIDO PRINCIPAL
   =================== */

.system-content {
    padding: var(--spacing-2xl);
    max-width: 100%;
}

.content-header {
    margin-bottom: var(--spacing-2xl);
}

.content-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.content-subtitle {
    color: var(--gray-600);
    font-size: 1.125rem;
}

/* ===================
   COMPONENTES UI
   =================== */

/* Cards Modernas */
.card-modern {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    border: none;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card-modern:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header-modern {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    color: white;
    padding: var(--spacing-lg);
    border: none;
}

.card-body-modern {
    padding: var(--spacing-xl);
}

/* Estadísticas */
.stat-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    border: none;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Botones Modernos */
.btn-modern {
    border-radius: var(--border-radius);
    font-weight: 500;
    padding: var(--spacing-md) var(--spacing-xl);
    transition: all var(--transition-fast);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn-modern:hover::before {
    left: 100%;
}

/* Formularios Modernos */
.form-modern {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
}

.form-group-modern {
    margin-bottom: var(--spacing-lg);
}

.form-label-modern {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.form-control-modern {
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-control-modern:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
    outline: none;
}

/* Tablas Modernas */
.table-modern {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.table-modern thead th {
    background: var(--gray-50);
    border: none;
    font-weight: 600;
    color: var(--gray-800);
    padding: var(--spacing-lg);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.table-modern tbody td {
    padding: var(--spacing-lg);
    border: none;
    border-bottom: 1px solid var(--gray-100);
}

.table-modern tbody tr:hover {
    background: var(--gray-50);
}

/* ===================
   UTILIDADES
   =================== */

.text-gradient {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-effect {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

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

.animate-slide-up {
    animation: slideUp 0.5s ease-out;
}

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

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

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

@media (max-width: 768px) {
    .system-sidebar {
        z-index: var(--z-modal);
    }

    .system-main {
        margin-left: 0 !important;
    }

    .menu-toggle {
        display: block;
    }

    .breadcrumb-nav {
        display: none;
    }

    .topbar-content {
        padding: var(--spacing-md);
    }

    .system-content {
        padding: var(--spacing-lg);
    }

    .content-title {
        font-size: 1.5rem;
    }

    .stat-card {
        margin-bottom: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .system-content {
        padding: var(--spacing-md);
    }

    .topbar-actions {
        gap: var(--spacing-sm);
    }

    .sidebar-brand span {
        display: none;
    }

    .theme-selector {
        display: none;
    }
}

/* ===================
   ACCESIBILIDAD
   =================== */

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

/* Focus visible para navegación por teclado */
.btn:focus-visible,
.form-control:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Modo alto contraste */
@media (prefers-contrast: high) {
    :root {
        --gray-100: white;
        --gray-200: white;
        --gray-800: black;
        --gray-900: black;
    }
}