:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --text-color: #212529;
    --text-muted: #6c757d;
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.125);
    --hover-bg: rgba(0, 0, 0, 0.075);
    --label-color: #495057;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --modal-bg: #ffffff;
    --input-bg: #ffffff;
    --input-text: #212529;
    --input-border: #ced4da;
}

[data-theme="dark"] {
    --primary-color: #0d6efd;
    --secondary-color: #adb5bd;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #212529;
    --dark-color: #f8f9fa;
    --text-color: #f8f9fa;
    --text-muted: #adb5bd;
    --card-bg: #2c3034;
    --card-border: rgba(255, 255, 255, 0.125);
    --hover-bg: rgba(255, 255, 255, 0.075);
    --label-color: #adb5bd;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --modal-bg: #2c3034;
    --input-bg: #343a40;
    --input-text: #f8f9fa;
    --input-border: #495057;
}

body {
    background-color: var(--light-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

.navbar {
    background-color: var(--primary-color) !important;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    transition: background-color 0.3s, border-color 0.3s;
}

.table {
    color: var(--text-color);
}

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

.priority-high {
    color: var(--danger-color);
}

.priority-medium {
    color: var(--warning-color);
}

.priority-low {
    color: var(--success-color);
}

.btn-outline-light {
    color: var(--text-color);
    border-color: var(--text-color);
}

.btn-outline-light:hover {
    background-color: var(--text-color);
    color: var(--light-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .table-responsive {
        margin-bottom: 1rem;
    }
}

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

.item-row {
    animation: fadeIn 0.3s ease-out;
}

/* Accessibility improvements */
:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

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

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

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

/* Form controls */
.form-label {
    color: var(--label-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.form-control, .form-select {
    background-color: var(--input-bg);
    color: var(--input-text);
    border-color: var(--input-border);
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.form-control:focus, .form-select:focus {
    background-color: var(--input-bg);
    color: var(--input-text);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
    transform: translateY(-1px);
}

.input-group-text {
    background-color: var(--input-bg);
    color: var(--input-text);
    border-color: var(--input-border);
    transition: all 0.3s ease;
}

/* Card hover effects */
.card {
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

/* Button effects */
.btn {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.btn:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

/* Table row hover effect */
.table-hover tbody tr {
    transition: all 0.3s ease;
}

.table-hover tbody tr:hover {
    background-color: var(--hover-bg);
    transform: scale(1.01);
}

/* Priority indicators */
.priority-high, .priority-medium, .priority-low {
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    display: inline-block;
}

.priority-high {
    background-color: rgba(220, 53, 69, 0.1);
}

.priority-medium {
    background-color: rgba(255, 193, 7, 0.1);
}

.priority-low {
    background-color: rgba(40, 167, 69, 0.1);
}

/* Alert animations */
.alert {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Modal animations */
.modal.fade .modal-dialog {
    transform: scale(0.9);
    transition: transform 0.3s ease-out;
}

.modal.show .modal-dialog {
    transform: scale(1);
}

/* Responsive improvements */
@media (max-width: 768px) {
    .card {
        margin-bottom: 1.5rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }
    
    .form-control, .form-select {
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

/* Loading state */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(2px);
    z-index: 1;
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Modal */
.modal-content {
    background-color: var(--modal-bg);
    color: var(--text-color);
}

.modal-header {
    border-bottom-color: var(--card-border);
}

.modal-footer {
    border-top-color: var(--card-border);
}

/* Alert position and style */
.alert-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    max-width: 400px;
}

.alert {
    animation: slideIn 0.3s ease-out;
    margin-bottom: 10px;
    box-shadow: 0 2px 4px var(--shadow-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Priority filters */
.priority-filters {
    margin-bottom: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.priority-filter-btn {
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.priority-filter-btn.active {
    transform: scale(1.05);
    box-shadow: 0 2px 4px var(--shadow-color);
}

.priority-filter-btn[data-priority="alta"] {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.priority-filter-btn[data-priority="media"] {
    background-color: rgba(255, 193, 7, 0.1);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.priority-filter-btn[data-priority="baja"] {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.priority-filter-btn[data-priority="todos"] {
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

/* Table improvements */
.table-container {
    position: relative;
    min-height: 200px;
}

.table-empty-message {
    text-align: center;
    padding: 2rem;
    color: var(--secondary-color);
    font-style: italic;
}

/* Price format */
.price-cell {
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

/* Responsive improvements */
@media (max-width: 768px) {
    .alert-container {
        left: 20px;
        right: 20px;
        max-width: none;
    }
    
    .priority-filters {
        justify-content: center;
    }
    
    .priority-filter-btn {
        flex: 1;
        min-width: 120px;
        text-align: center;
    }
}

/* Category styles */
.category-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--primary-color);
    font-size: 0.875rem;
    margin-right: 0.5rem;
    transition: all 0.3s ease;
}

.category-tag i {
    font-size: 0.75rem;
}

.categories-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.category-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.25rem;
    transition: all 0.3s ease;
}

.category-item:hover {
    transform: translateX(5px);
    box-shadow: 0 2px 4px var(--shadow-color);
}

.category-item .actions {
    display: flex;
    gap: 0.5rem;
}

/* Empty state styles */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
    opacity: 0.5;
}

.empty-state p {
    margin-bottom: 1rem;
}

/* Filter transitions */
.priority-filters {
    transition: all 0.3s ease;
}

.priority-filter-btn {
    position: relative;
    overflow: hidden;
}

.priority-filter-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.priority-filter-btn:active::after {
    animation: ripple 0.6s ease-out;
}

/* Table transitions */
.table-container {
    transition: all 0.3s ease;
}

.table-hover tbody tr {
    transition: all 0.3s ease;
}

.table-hover tbody tr:hover {
    transform: translateX(5px);
}

/* Loading state */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

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

/* Modal transitions */
.modal.fade .modal-dialog {
    transform: scale(0.9) translateY(-20px);
    transition: all 0.3s ease-out;
}

.modal.show .modal-dialog {
    transform: scale(1) translateY(0);
}

/* Responsive improvements */
@media (max-width: 768px) {
    .category-item {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .category-item .actions {
        width: 100%;
        justify-content: flex-end;
    }
}

/* Text styles */
.text-muted {
    color: var(--text-muted) !important;
}

/* Button styles */
.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

.btn-outline-danger {
    color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-outline-danger:hover {
    background-color: var(--danger-color);
    color: var(--text-color);
}

/* Alert styles */
.alert {
    background-color: var(--card-bg);
    border-color: var(--card-border);
    color: var(--text-color);
}

.alert-primary {
    background-color: rgba(13, 110, 253, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    border-color: var(--danger-color);
    color: var(--danger-color);
}

/* Table styles */
.table th {
    color: var(--text-muted);
}

/* Category items */
.category-item {
    background-color: var(--card-bg);
    border-color: var(--card-border);
    color: var(--text-color);
}

/* Price cell */
.price-cell {
    color: var(--text-color);
    font-weight: 600;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .priority-filter-btn {
        color: var(--text-color);
    }
}

.card-title {
    color: var(--text-color);
}

.card-header {
    background-color: var(--card-bg);
    border-bottom-color: var(--card-border);
}

.navbar-brand {
    color: var(--text-color);
}

/* Tags styles */
.tags-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.tag-options {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag-btn {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    border-radius: 1rem;
}

.tag-btn.active {
    background-color: var(--primary-color);
    color: var(--text-color);
}

.selected-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    min-height: 2rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--primary-color);
    border-radius: 1rem;
    font-size: 0.875rem;
}

.tag i {
    cursor: pointer;
}

.tag i:hover {
    color: var(--danger-color);
}

/* Sort options */
.sort-options {
    min-width: 200px;
}

/* History styles */
.history-item {
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.history-item:hover {
    opacity: 1;
}

/* Link styles */
.item-link {
    color: var(--primary-color);
    text-decoration: none;
}

.item-link:hover {
    text-decoration: underline;
}

/* Grouped items */
.category-group {
    margin-bottom: 1.5rem;
}

.category-group-header {
    background-color: transparent !important;
    border: none !important;
    padding: 0.5rem 0 !important;
    margin-bottom: 0.5rem !important;
}

.category-group-header .alert {
    margin-bottom: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: 0.25rem;
}

.category-group-header .alert i {
    font-size: 1.1rem;
}

/* Table adjustments for category groups */
.table-container {
    position: relative;
}

.table-container table {
    margin-bottom: 0;
}

.table-container .table > :not(caption) > * > * {
    padding: 0.75rem 1rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .category-group-header .alert {
        padding: 0.5rem 0.75rem;
    }
    
    .category-group-header .alert i {
        font-size: 1rem;
    }
}

/* Tags styles */
.tags-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.tag-options {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag-btn {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    border-radius: 1rem;
}

.tag-btn.active {
    background-color: var(--primary-color);
    color: var(--text-color);
}

.selected-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    min-height: 2rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--primary-color);
    border-radius: 1rem;
    font-size: 0.875rem;
}

.tag i {
    cursor: pointer;
}

.tag i:hover {
    color: var(--danger-color);
}

/* Sort options */
.sort-options {
    min-width: 200px;
}

/* History styles */
.history-item {
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.history-item:hover {
    opacity: 1;
}

/* Link styles */
.item-link {
    color: var(--primary-color);
    text-decoration: none;
}

.item-link:hover {
    text-decoration: underline;
}

/* Grouped items */
.category-group {
    margin-bottom: 1.5rem;
}

.category-group-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.25rem;
    margin-bottom: 0.5rem;
}

.category-group-header i {
    color: var(--primary-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .tag-options {
        justify-content: center;
    }
    
    .sort-options {
        width: 100%;
        margin-top: 1rem;
    }
    
    .d-flex.justify-content-between {
        flex-direction: column;
    }
}

/* Form styles */
.quick-form {
    transition: all 0.3s ease;
}

.quick-form .form-control,
.quick-form .form-select {
    background-color: var(--input-bg);
    color: var(--input-text);
    border-color: var(--input-border);
    box-shadow: 0 2px 4px var(--shadow-color);
}

.quick-form .form-control:focus,
.quick-form .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.quick-form .input-group-text {
    background-color: var(--input-bg);
    color: var(--input-text);
    border-color: var(--input-border);
}

.quick-form .row {
    margin-bottom: 1rem;
}

.quick-form .col-md-4 {
    margin-bottom: 0.5rem;
}

.full-form {
    animation: slideDown 0.3s ease-out;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--card-border);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#toggleFormBtn {
    transition: all 0.3s ease;
}

#toggleFormBtn i {
    transition: transform 0.3s ease;
}

.full-form.active #toggleFormBtn i {
    transform: rotate(180deg);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .quick-form .col-md-4 {
        margin-bottom: 1rem;
    }
    
    .quick-form .d-flex {
        flex-direction: column;
        gap: 1rem;
    }
    
    .quick-form .btn {
        width: 100%;
    }
}

/* Empty state button */
.empty-state .btn {
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    font-size: 1.1rem;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: all 0.3s ease;
}

.empty-state .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .quick-form .input-group {
        flex-direction: column;
    }
    
    .quick-form .form-control {
        border-right: 1px solid var(--input-border);
        border-bottom: none;
        border-radius: 0.25rem 0.25rem 0 0;
    }
    
    .quick-form .btn {
        border-left: 1px solid var(--input-border);
        border-radius: 0 0 0.25rem 0.25rem;
    }
}