:root {
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --bg-color: #f4f7f6;
    --text-color: #333;
    --border-radius: 6px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Contenedor para que el contenido principal ocupe el espacio */
.main-content {
    padding: 20px;
    flex: 1;
}

nav {
    background: var(--primary-color);
    padding: 15px;
    margin-bottom: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

nav a {
    color: white;
    text-decoration: none;
    margin-right: 15px;
    font-weight: bold;
    padding: 10px;
}

nav a:hover,
nav a.active {
    background-color: var(--accent-color);
    border-radius: var(--border-radius);
}

footer {
    background: var(--primary-color);
    color: white;
    padding: 20px;
    text-align: center;
    font-size: 0.9em;
    margin-top: 40px;
}

h1,
h2 {
    color: var(--primary-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

th,
td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #ececec;
}

input[type="text"],
input[type="password"],
input[type="number"],
select {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    width: 250px;
}

button {
    padding: 10px 20px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background: #2980b9;
}

.login-container {
    max-width: 400px;
    margin: 50px auto;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

/* --- Estilos personalizados para DataTables.net --- */

.dataTables_wrapper {
    margin-top: 20px;
    font-family: inherit;
}

.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_filter {
    margin-bottom: 15px;
    color: var(--text-color);
}

.dataTables_wrapper .dataTables_filter input {
    padding: 8px 12px;
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    background-color: white;
    margin-left: 8px;
    outline: none;
    box-sizing: border-box;
    transition: border-color 0.2s ease-in-out;
}

.dataTables_wrapper .dataTables_filter input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.2);
}

.dataTables_wrapper .dataTables_length select {
    padding: 8px 12px;
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    background-color: white;
    margin: 0 4px;
    outline: none;
    transition: border-color 0.2s ease-in-out;
    width: auto;
}

.dataTables_wrapper .dataTables_length select:focus {
    border-color: var(--accent-color);
}

.dataTables_wrapper .dataTables_info {
    padding-top: 15px;
    color: #7f8c8d;
    font-size: 0.9em;
}

.dataTables_wrapper .dataTables_paginate {
    padding-top: 15px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    padding: 6px 12px !important;
    margin: 0 3px !important;
    border-radius: var(--border-radius) !important;
    border: 1px solid #ddd !important;
    background: white !important;
    color: var(--text-color) !important;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current,
.dataTables_wrapper .dataTables_paginate .paginate_button.current:hover {
    background: var(--accent-color) !important;
    color: white !important;
    border-color: var(--accent-color) !important;
    font-weight: bold;
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: #e2e8f0 !important;
    color: var(--primary-color) !important;
    border-color: #cbd5e1 !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.disabled,
.dataTables_wrapper .dataTables_paginate .paginate_button.disabled:hover,
.dataTables_wrapper .dataTables_paginate .paginate_button.disabled:active {
    background: #f4f7f6 !important;
    color: #95a5a6 !important;
    border-color: #e2e8f0 !important;
    cursor: not-allowed !important;
    box-shadow: none !important;
}

table.dataTable thead th {
    background-color: #ececec;
    color: var(--primary-color);
    font-weight: bold;
    border-bottom: 2px solid #ddd !important;
    position: relative;
}

table.dataTable {
    margin-bottom: 20px !important;
    border-bottom: 1px solid #ddd !important;
}

/* --- Estilos personalizados para Select2 --- */

.select2-container--default .select2-selection--single {
    border: 1px solid #ccc !important;
    border-radius: var(--border-radius) !important;
    height: auto !important;
    padding: 6px 12px !important;
    background-color: white !important;
    transition: border-color 0.2s ease-in-out;
}

.select2-container--default.select2-container--focus .select2-selection--single {
    border-color: var(--accent-color) !important;
    outline: none !important;
}

.select2-container--default .select2-selection--single .select2-selection__rendered {
    color: var(--text-color) !important;
    line-height: 1.5 !important;
    padding-left: 0 !important;
}

.select2-container--default .select2-selection--single .select2-selection__placeholder {
    color: #999 !important;
}

.select2-container--default .select2-selection--single .select2-selection__arrow {
    height: 100% !important;
    top: 0 !important;
    right: 8px !important;
}

.select2-container--default .select2-selection--single .select2-selection__arrow b {
    border-color: #888 transparent transparent transparent !important;
}

.select2-container--default.select2-container--open .select2-selection--single .select2-selection__arrow b {
    border-color: transparent transparent #888 transparent !important;
}

.select2-container {
    width: 250px !important;
    vertical-align: middle;
}

.select2-dropdown {
    border: 1px solid #ccc !important;
    border-radius: var(--border-radius) !important;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1) !important;
    overflow: hidden;
}

.select2-search--dropdown {
    padding: 8px !important;
}

.select2-container--default .select2-search--dropdown .select2-search__field {
    border: 1px solid #ccc !important;
    border-radius: var(--border-radius) !important;
    padding: 6px 10px !important;
    outline: none !important;
}

.select2-container--default .select2-search--dropdown .select2-search__field:focus {
    border-color: var(--accent-color) !important;
}

.select2-container--default .select2-results__option {
    padding: 8px 12px !important;
}

.select2-container--default .select2-results__option--highlighted[aria-selected] {
    background-color: var(--accent-color) !important;
    color: white !important;
}

.select2-container--default .select2-results__option[aria-selected="true"] {
    background-color: #f4f7f6 !important;
    color: var(--primary-color) !important;
}

/* --- Estilos de Modales Compartidos --- */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
}

.modal-container {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 500px;
    position: relative;
    transform: translateY(-30px);
    transition: transform 0.3s ease;
    box-sizing: border-box;
}

.modal-overlay.active .modal-container {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.modal-header h3 {
    margin: 0;
    color: var(--primary-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: #aaa;
    line-height: 1;
}

.modal-close:hover {
    color: #e74c3c;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
    border-top: 1px solid #eee;
    padding-top: 15px;
}

.modal-footer button,
.modal-footer a.btn-eliminar-modal {
    padding: 10px 20px;
    font-size: 0.9em;
    cursor: pointer;
}

/* Estilo peligro (botón rojo) para eliminar */
.btn-danger {
    background: #e74c3c !important;
    color: white !important;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: bold;
    display: inline-block;
    transition: 0.3s;
    text-align: center;
    border: none;
}

.btn-danger:hover {
    background: #c0392b !important;
}