:root {
    /* Color Palette - Default Dark Theme */
    --bg-color: #0f172a; /* Slate 900 */
    --surface-color: #1e293b; /* Slate 800 */
    --surface-hover: #334155; /* Slate 700 */
    --border-color: #334155;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    
    /* PUCPR Branding Colors as accents (Blue/Gold adapted for dark mode) */
    --primary-color: #3b82f6; /* Blue 500 */
    --primary-hover: #2563eb;
    --accent-color: #eab308; /* Yellow/Gold 500 */
    
    --danger-color: #ef4444;
    --danger-hover: #dc2626;

    --font-family: 'Inter', sans-serif;
    --border-radius: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-color: #f1f5f9; /* Slate 100 */
    --surface-color: #ffffff;
    --surface-hover: #f8fafc;
    --border-color: #e2e8f0;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    transition: background-color var(--transition), color var(--transition);
    min-height: 100vh;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.5rem 2rem;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: all var(--transition);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.logo-text h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.logo-text span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Search */
.search-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.search-wrap i {
    position: absolute;
    left: 1rem;
    color: var(--text-secondary);
}

.search-wrap input {
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-primary);
    width: 300px;
    transition: var(--transition);
    outline: none;
}

.search-wrap input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Buttons */
button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: var(--font-family);
    transition: var(--transition);
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.primary-btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.secondary-btn {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
}

.secondary-btn:hover {
    background-color: var(--surface-hover);
}

.danger-btn {
    background-color: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    cursor: pointer;
    font-family: var(--font-family);
}

.danger-btn:hover:not(:disabled) {
    background-color: var(--danger-color);
    color: white;
}

.danger-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.icon-btn {
    background-color: transparent;
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.icon-btn:hover {
    background-color: var(--surface-hover);
    color: var(--primary-color);
}

.icon-btn.delete:hover {
    color: var(--danger-color);
}

/* Table */
.table-container {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

thead {
    background-color: var(--surface-hover);
}

th {
    padding: 1rem 1.5rem;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: top;
}

tbody tr {
    transition: var(--transition);
}

tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.contact-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    background-color: var(--surface-hover);
    border: 1px solid var(--border-color);
    margin-top: 0.25rem;
}

.recinto-badge {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    border-color: rgba(59, 130, 246, 0.2);
}

.action-btns {
    display: flex;
    gap: 0.5rem;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
    text-align: center;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.hidden {
    display: none !important;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity var(--transition);
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    transform: translateY(0);
    transition: transform var(--transition);
}

.modal.hidden .modal-content {
    transform: translateY(20px);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--surface-hover);
}

/* Form */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    padding: 2rem;
}

.full-width {
    grid-column: 1 / -1;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input, 
.form-group select {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
}

.form-group input:focus, 
.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}

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

tbody tr {
    animation: fadeIn 0.4s ease-out forwards;
}

/* Pagination */
.pagination-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--surface-color);
}

.pagination-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pagination-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.rows-per-page {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.rows-per-page select {
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-primary);
    outline: none;
    cursor: pointer;
}

.page-buttons {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-buttons .icon-btn {
    width: 32px;
    height: 32px;
}

.page-buttons .icon-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: transparent;
    color: var(--text-secondary);
}

#pageIndicator {
    font-size: 0.85rem;
    font-weight: 500;
    min-width: 60px;
    text-align: center;
}

/* Side Modal for Details */
.side-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1050;
    opacity: 1;
    transition: opacity var(--transition);
    display: flex;
    justify-content: flex-end;
}

.side-modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.side-modal-content {
    background-color: var(--surface-color);
    width: 400px;
    max-width: 100%;
    height: 100%;
    border-left: 1px solid var(--border-color);
    box-shadow: -10px 0 25px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    transform: translateX(0);
    transition: transform var(--transition);
}

.side-modal.hidden .side-modal-content {
    transform: translateX(100%);
}

.side-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.side-modal-body {
    padding: 2rem;
    overflow-y: auto;
    flex: 1;
}

.detail-group {
    margin-bottom: 1.5rem;
}

.detail-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-word;
}

.detail-value .ph {
    margin-right: 0.5rem;
    color: var(--primary-color);
    font-size: 1.1rem;
    vertical-align: middle;
}

.clickable-name {
    cursor: pointer;
    color: var(--primary-color);
    transition: color var(--transition);
    display: inline-block;
}


.clickable-name:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Admin UI */
.mapping-table td {
    padding: 0.75rem 0;
    border-bottom: 1px dashed var(--border-color);
}

.mapping-table select {
    width: 100%;
    padding: 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-primary);
    outline: none;
}

.mapping-table select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

/* Toggles & Dropdown */
.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    min-width: 220px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2);
    z-index: 50;
    transition: opacity var(--transition), transform var(--transition);
    transform-origin: top right;
}

.dropdown-menu.hidden {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
}

.toggle-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toggle-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* Elegant iOS-style Switch */
.toggle-switch {
    position: relative;
    width: 36px;
    height: 20px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch .slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--surface-hover);
    transition: .4s;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.toggle-switch .slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 2px;
    bottom: 2px;
    background-color: var(--text-secondary);
    transition: .4s;
    border-radius: 50%;
}

.toggle-switch input:checked + .slider {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.toggle-switch input:checked + .slider:before {
    transform: translateX(16px);
    background-color: white;
}

/* Column Visibility Helper Classes */
body.hide-col-puesto [data-col="puesto"],
body.hide-col-colegio [data-col="colegio"],
body.hide-col-ubicacion [data-col="ubicacion"],
body.hide-col-contacto [data-col="contacto"] {
    display: none !important;
}

/* Table Sorting */
th.sortable {
    cursor: pointer;
    user-select: none;
    transition: color var(--transition);
}

th.sortable:hover {
    color: var(--primary-color);
}

th i {
    visibility: hidden;
    margin-left: 0.25rem;
    font-size: 0.9rem;
}

th.sortable:hover i {
    visibility: visible;
    opacity: 0.5;
}

th.sort-active {
    color: var(--primary-color);
}

th.sort-active i {
    visibility: visible;
    opacity: 1;
}

th.sort-desc i {
    transform: rotate(180deg);
}

/* Login Screen */
.login-screen {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    transition: opacity var(--transition);
}

.login-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 3rem 2rem;
    width: 90%;
    max-width: 450px;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.login-card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

/* Drag and Drop for Columns */
.toggle-item[draggable="true"] {
    cursor: grab;
    user-select: none;
    padding: 0.25rem;
    margin: -0.25rem;
    border-radius: 6px;
    transition: background-color var(--transition);
}

.toggle-item[draggable="true"]:active {
    cursor: grabbing;
}

.drag-handle {
    cursor: grab;
    color: var(--text-secondary);
    font-size: 1.25rem;
}

.drag-handle:hover {
    color: var(--text-primary);
}

.toggle-item.dragging {
    opacity: 0.5;
    background-color: var(--surface-hover);
    border: 1px dashed var(--border-color);
}

/* Viewer Role Restrictions */
body.role-viewer .action-btns,
body.role-viewer #adminBtn,
body.role-viewer #addContactBtn {
    display: none !important;
}