/* ===== VARIABLES CSS MODERNO ===== */
:root {
    /* Colores primarios - Paleta moderna */
    --primary: #6366f1;           /* Índigo */
    --primary-dark: #4f46e5;      /* Índigo oscuro */
    --primary-light: #818cf8;     /* Índigo claro */
    --secondary: #10b981;         /* Esmeralda */
    --secondary-dark: #059669;    /* Esmeralda oscura */
    --accent: #f59e0b;            /* Ámbar */

    /* Colores de estado - Mejorados para accesibilidad */
    --warning-bg: #fef3c7;        /* Fondo amarillo claro */
    --warning-border: #f59e0b;    /* Borde ámbar */
    --warning-text: #92400e;      /* Texto marrón oscuro (alta legibilidad) */
    --warning-icon: #d97706;      /* Icono naranja oscuro */

    /* Fondos */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;      /* Gris muy claro */
    --bg-tertiary: #f3f4f6;       /* Gris claro */
    --bg-dark: #111827;           /* Gris muy oscuro */

    /* Texto */
    --text-primary: #111827;
    --text-secondary: #6b7280;    /* Gris */
    --text-tertiary: #9ca3af;     /* Gris claro */
    --text-light: #d1d5db;        /* Gris muy claro */

    /* Bordes */
    --border-color: #e5e7eb;
    --border-color-light: #f3f4f6;

    /* Sombras modernas */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 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);

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

    /* Radios */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Transiciones */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== ESTILOS GLOBALES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== TOPBAR MODERNO ===== */
.app-topbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-bottom: none;
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    flex-shrink: 0;
}

.app-topbar .navbar-brand {
    font-size: 1.25rem;
    letter-spacing: -0.5px;
    transition: var(--transition);
}

.app-topbar .navbar-brand:hover {
    transform: translateY(-2px);
}

.app-topbar .navbar-brand i {
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== SIDEBAR MODERNO ===== */
.app-wrapper {
    display: flex;
    flex: 1 1 auto;
    margin-top: 56px;
}

.app-sidebar {
    width: 250px;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    transition: var(--transition);
    position: fixed;
    top: 56px;
    bottom: 0;
    left: 0;
    max-height: calc(100vh - 56px);
    z-index: 900;
}

.app-sidebar.sidebar-collapsed {
    width: 0;
    border-right: none;
}

.sidebar-nav {
    padding: var(--spacing-md) 0;
}

.sidebar-nav .nav-item {
    margin-bottom: var(--spacing-xs);
    padding: 0 var(--spacing-sm);
}

.sidebar-nav .nav-link {
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    border-left: 3px solid transparent;
    margin-left: 0;
}

.sidebar-nav .nav-link:hover {
    background-color: var(--bg-secondary);
    color: var(--primary);
    border-left-color: var(--primary);
    transform: translateX(4px);
}

.sidebar-nav .nav-link.active {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 600;
}

.sidebar-nav .nav-link i {
    font-size: 1.1rem;
    min-width: 24px;
}

.sidebar-section-label {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-tertiary);
}

.sidebar-footer {
    padding: var(--spacing-lg) var(--spacing-md);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

/* ===== CONTENIDO PRINCIPAL ===== */
.app-content {
    flex: 1;
    background-color: var(--bg-secondary);
    transition: var(--transition);
    padding: var(--spacing-lg);
    margin-left: 250px;
}

.app-content.sidebar-collapsed {
    margin-left: 0;
    width: 100%;
}

/* ===== CARDS MODERNAS ===== */
.card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    background-color: var(--bg-primary);
}

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

.card-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: var(--spacing-lg);
    font-weight: 600;
}

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

.card-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    padding: var(--spacing-lg);
}

/* ===== BOTONES MODERNOS ===== */
.btn {
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    padding: 0.5rem 1rem;
    transition: var(--transition);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

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

.btn-success {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

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

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

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* ===== FORMULARIOS MODERNOS ===== */
.form-control,
.form-select {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.625rem 0.875rem;
    font-size: 0.9rem;
    transition: var(--transition);
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    outline: none;
}

.form-control-lg {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: block;
}

.form-check-input {
    border-color: var(--border-color);
    width: 1.25rem;
    height: 1.25rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

/* ===== TABLAS MODERNAS ===== */
.table {
    background-color: var(--bg-primary);
}

.table thead th {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    padding: var(--spacing-md);
}

.table tbody tr {
    border-color: var(--border-color-light);
    transition: var(--transition);
}

.table tbody tr:hover {
    background-color: var(--bg-secondary);
}

.table tbody td {
    padding: var(--spacing-md);
    vertical-align: middle;
}

/* ===== ALERTAS MODERNAS ===== */
.alert {
    border: 1px solid;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.alert-primary {
    background-color: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--primary);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--secondary);
}

.alert-info {
    background-color: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--primary);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
    color: var(--accent);
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* ===== BADGES MODERNOS ===== */
.badge {
    border-radius: var(--radius-full);
    font-weight: 600;
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.badge.bg-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%) !important;
}

.badge.bg-success {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%) !important;
}

.badge.bg-secondary {
    background-color: var(--text-tertiary) !important;
}

/* ===== MODALES MODERNOS ===== */
.modal-content {
    border: none;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    background-color: var(--bg-primary);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg);
}

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

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* ===== ANIMACIONES ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.3s ease-out;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .app-sidebar {
        position: fixed;
        left: 0;
        top: 56px;
        height: calc(100vh - 56px);
        z-index: 999;
        box-shadow: var(--shadow-lg);
    }

    .app-sidebar.sidebar-collapsed {
        transform: translateX(-100%);
    }

    .app-content {
        width: 100%;
    }

    .sidebar-label {
        display: none;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .table {
        font-size: 0.875rem;
    }

    .table thead th,
    .table tbody td {
        padding: 0.5rem 0.25rem;
    }
}

@media (max-width: 576px) {
    .app-topbar {
        padding: 0.75rem 1rem;
    }

    .app-topbar .navbar-brand {
        font-size: 1rem;
    }

    .card-body,
    .card-header,
    .card-footer,
    .alert,
    .modal-body,
    .modal-header,
    .modal-footer {
        padding: var(--spacing-md);
    }

    .d-none.d-md-inline {
        display: none !important;
    }
}

/* ===== UTILIDADES ===== */
.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-tertiary) !important; }

.bg-light { background-color: var(--bg-secondary) !important; }
.bg-lighter { background-color: var(--bg-tertiary) !important; }

.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-xl { border-radius: var(--radius-xl) !important; }

.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }

.gap-xs { gap: var(--spacing-xs) !important; }
.gap-sm { gap: var(--spacing-sm) !important; }
.gap-md { gap: var(--spacing-md) !important; }
.gap-lg { gap: var(--spacing-lg) !important; }

.p-md { padding: var(--spacing-md) !important; }
.p-lg { padding: var(--spacing-lg) !important; }
.p-xl { padding: var(--spacing-xl) !important; }

.m-md { margin: var(--spacing-md) !important; }
.m-lg { margin: var(--spacing-lg) !important; }
.m-xl { margin: var(--spacing-xl) !important; }

.fw-600 { font-weight: 600 !important; }
.fw-500 { font-weight: 500 !important; }

/* ===== SMOOTH SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ===== PERSONALIZACIÓN BOOTSTRAP ===== */
.input-group-text {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.input-group .form-control {
    border-color: var(--border-color);
}

.input-group .form-control:focus {
    border-color: var(--primary);
}

/* ===== FOOTER ===== */
.app-footer {
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    flex-shrink: 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-copyright {
    text-align: center;
    font-weight: 500;
    color: var(--text-primary);
}

.footer-disclaimer {
    background: rgba(var(--primary-rgb), 0.05);
    border-left: 3px solid var(--primary);
    padding: 1rem;
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    line-height: 1.6;
}

.footer-disclaimer p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-disclaimer p:last-child {
    margin-bottom: 0;
}

.footer-disclaimer a {
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.footer-disclaimer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ===== OVERRIDES PARA MEJORAR ACCESIBILIDAD DE WARNINGS ===== */

/* Alert warning con mejor contraste */
.alert-warning {
    background-color: var(--warning-bg) !important;
    border-color: var(--warning-border) !important;
    color: var(--warning-text) !important;
}

.alert-warning .alert-heading,
.alert-warning h6,
.alert-warning strong {
    color: var(--warning-text) !important;
}

/* Iconos en alertas warning */
.alert-warning .bi,
.alert-warning i {
    color: var(--warning-icon) !important;
}

/* Texto warning con mejor contraste */
.text-warning {
    color: var(--warning-icon) !important;
}

/* Badge warning */
.badge.bg-warning {
    background-color: var(--warning-border) !important;
    color: white !important;
}

/* Botones warning */
.btn-warning {
    background-color: var(--warning-border) !important;
    border-color: var(--warning-border) !important;
    color: white !important;
}

.btn-warning:hover {
    background-color: var(--warning-icon) !important;
    border-color: var(--warning-icon) !important;
}

.btn-outline-warning {
    color: var(--warning-icon) !important;
    border-color: var(--warning-border) !important;
}

.btn-outline-warning:hover {
    background-color: var(--warning-border) !important;
    border-color: var(--warning-border) !important;
    color: white !important;
}