:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #64748b;
    --color-success: #22c55e;
    --color-danger: #ef4444;
    --color-warning: #f59e0b;
    --color-info: #06b6d4;
    
    --color-bg-body: #f1f5f9;
    --color-bg-card: #ffffff;
    --color-bg-sidebar: #f8fafc;
    --color-bg-header: #1e293b;
    
    --color-text-primary: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-text-inverse: #ffffff;
    
    --color-border: #e2e8f0;
    --color-border-focus: #2563eb;
    
    --color-accent: #8b5cf6;
    --color-accent-hover: #7c3aed;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 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);
    
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg-body);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-text-inverse);
    text-decoration: none;
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: var(--color-text-inverse);
    border-color: var(--color-secondary);
}

.btn-secondary:hover {
    background-color: #475569;
    color: var(--color-text-inverse);
    text-decoration: none;
}

.btn-success {
    background-color: var(--color-success);
    color: var(--color-text-inverse);
    border-color: var(--color-success);
}

.btn-success:hover {
    background-color: #16a34a;
    color: var(--color-text-inverse);
    text-decoration: none;
}

.btn-danger {
    background-color: var(--color-danger);
    color: var(--color-text-inverse);
    border-color: var(--color-danger);
}

.btn-danger:hover {
    background-color: #dc2626;
    color: var(--color-text-inverse);
    text-decoration: none;
}

.btn-warning {
    background-color: var(--color-warning);
    color: var(--color-text-primary);
    border-color: var(--color-warning);
}

.btn-warning:hover {
    background-color: #d97706;
    color: var(--color-text-primary);
    text-decoration: none;
}

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

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    text-decoration: none;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

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

.card {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.card-header {
    padding: 1rem 1.25rem;
    background-color: var(--color-bg-sidebar);
    border-bottom: 1px solid var(--color-border);
    font-weight: 600;
}

.card-body {
    padding: 1.25rem;
}

.card-footer {
    padding: 0.75rem 1.25rem;
    background-color: var(--color-bg-sidebar);
    border-top: 1px solid var(--color-border);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table thead th {
    background-color: var(--color-bg-sidebar);
    font-weight: 600;
    color: var(--color-text-primary);
    border-bottom: 2px solid var(--color-border);
}

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

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

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.badge-primary {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

.badge-success {
    background-color: var(--color-success);
    color: var(--color-text-inverse);
}

.badge-danger {
    background-color: var(--color-danger);
    color: var(--color-text-inverse);
}

.badge-warning {
    background-color: var(--color-warning);
    color: var(--color-text-primary);
}

.badge-secondary {
    background-color: var(--color-secondary);
    color: var(--color-text-inverse);
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: var(--transition);
}

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

.form-label {
    display: inline-block;
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.form-group {
    margin-bottom: 1rem;
}

.input-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.input-group > .form-control {
    flex: 1 1 auto;
}

.container {
    width: 100%;
    padding-right: 1rem;
    padding-left: 1rem;
    margin-right: auto;
    margin-left: auto;
}

@media (min-width: 576px) {
    .container { max-width: 540px; }
}

@media (min-width: 768px) {
    .container { max-width: 720px; }
}

@media (min-width: 992px) {
    .container { max-width: 960px; }
}

@media (min-width: 1200px) {
    .container { max-width: 1140px; }
}

.d-flex { display: flex; }
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.align-items-center { align-items: center; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }

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

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }

.m-0 { margin: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 1rem; }
.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 1rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }

.border { border: 1px solid var(--color-border); }
.border-radius { border-radius: var(--radius); }
.shadow { box-shadow: var(--shadow); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }

.alert {
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.alert-primary {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.alert-success {
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.modal-header {
    background-color: var(--color-bg-header);
    color: var(--color-text-inverse);
    padding: 1rem 1.25rem;
    border-top-left-radius: var(--radius);
    border-top-right-radius: var(--radius);
}

.modal-body {
    padding: 1.25rem;
}

.modal-footer {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-sidebar);
    border-bottom-left-radius: var(--radius);
    border-bottom-right-radius: var(--radius);
}

.dropdown-menu {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 10rem;
    padding: 0.5rem 0;
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: 0.5rem 1rem;
    clear: both;
    font-weight: 400;
    color: var(--color-text-primary);
    text-align: inherit;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
    cursor: pointer;
    transition: var(--transition);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--color-bg-sidebar);
    color: var(--color-primary);
    text-decoration: none;
}

.dropdown-divider {
    height: 0;
    margin: 0.5rem 0;
    overflow: hidden;
    border-top: 1px solid var(--color-border);
}

.nav-tabs {
    display: flex;
    flex-wrap: wrap;
    padding-left: 0;
    margin-bottom: 0;
    list-style: none;
    border-bottom: 1px solid var(--color-border);
}

.nav-tabs .nav-link {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    cursor: pointer;
}

.nav-tabs .nav-link:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary-light);
}

.nav-tabs .nav-link.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: 600;
}

.pagination {
    display: flex;
    padding-left: 0;
    list-style: none;
    border-radius: var(--radius);
    gap: 0.25rem;
}

.page-link {
    display: block;
    padding: 0.5rem 0.75rem;
    color: var(--color-primary);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.page-link:hover {
    background-color: var(--color-bg-sidebar);
    border-color: var(--color-border);
    color: var(--color-primary-dark);
    text-decoration: none;
}

.page-item.active .page-link {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-inverse);
}

.panel {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
    margin-bottom: 1.5rem;
}

.panel-heading {
    padding: 1rem 1.25rem;
    background-color: var(--color-bg-sidebar);
    border-bottom: 1px solid var(--color-border);
    font-weight: 600;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.panel-body {
    padding: 1.25rem;
}

.bg-primary { background-color: var(--color-primary) !important; }
.bg-secondary { background-color: var(--color-secondary) !important; }
.bg-success { background-color: var(--color-success) !important; }
.bg-danger { background-color: var(--color-danger) !important; }
.bg-warning { background-color: var(--color-warning) !important; }
.bg-info { background-color: var(--color-info) !important; }
.bg-white { background-color: var(--color-bg-card) !important; }
.bg-light { background-color: var(--color-bg-sidebar) !important; }

.text-white { color: var(--color-text-inverse) !important; }

@media (max-width: 768px) {
    .container {
        padding-right: 0.75rem;
        padding-left: 0.75rem;
    }
    
    .table-responsive {
        display: block;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .card {
        border-radius: var(--radius);
    }
}

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

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

/* Navbar y Dropdowns */
.navbar {
    background-color: var(--bg-dark) !important;
    border-bottom: 3px solid var(--primary-color);
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85);
    transition: all 0.2s ease;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link:focus {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.navbar-dark .navbar-nav .nav-link.active {
    color: #fff;
    background-color: var(--primary-color);
    border-radius: 4px;
}

.navbar-dark .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.2);
}

.navbar-dark .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.dropdown-menu {
    background-color: var(--bg-dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    padding: 8px 0;
    min-width: 200px;
}

.dropdown-menu .dropdown-item {
    color: rgba(255, 255, 255, 0.85);
    padding: 10px 20px;
    font-size: 14px;
    transition: all 0.15s ease;
    border-radius: 0;
    margin: 2px 0;
}

.dropdown-menu .dropdown-item:hover,
.dropdown-menu .dropdown-item:focus {
    background-color: var(--primary-color);
    color: #fff;
    padding-left: 25px;
}

.dropdown-menu .dropdown-item i {
    margin-right: 8px;
    width: 18px;
    text-align: center;
}

.dropdown-menu .dropdown-divider {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    margin: 8px 0;
}

.nav-item.dropdown:hover .dropdown-menu {
    display: block;
    margin-top: 0;
    animation: fadeIn 0.2s ease;
}

.navbar-dark .navbar-brand {
    color: #fff;
    font-weight: 600;
}

.navbar-dark .navbar-brand:hover {
    color: var(--primary-color);
}

.caret {
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 5px;
    vertical-align: middle;
    border-top: 4px dashed;
    border-right: 4px solid transparent;
    border-left: 4px solid transparent;
}