:root {
    --primary-color: #5271ff;
    --secondary-color: #6a8aff;
    --accent-color: #3d57cc;
    --background-light: #f5f7ff;
    --text-dark: #333;
    --text-light: #f5f7ff;
    --border-color: #d1d9ff;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    
    /* Pastel Colors */
    --pastel-blue: #d1d9ff;
    --pastel-green: #d1ffdb;
    --pastel-red: #ffd1d1;
    --pastel-yellow: #fff5d1;
    --pastel-purple: #edd1ff;
}

[data-theme="dark"] {
    --primary-color: #3d57cc;
    --secondary-color: #5271ff;
    --accent-color: #6a8aff;
    --background-light: #1a1a2e;
    --text-dark: #f5f7ff;
    --text-light: #f5f7ff;
    --border-color: #3d4663;
    
    /* Pastel Colors in Dark Mode */
    --pastel-blue: #2a3052;
    --pastel-green: #2a5237;
    --pastel-red: #522a2a;
    --pastel-yellow: #524a2a;
    --pastel-purple: #3a2a52;
}

/* Table header text in dark mode */
[data-theme="dark"] .table thead th {
    color: white;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background-light);
    color: var(--text-dark);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    /* flex: 1; */
}

.content-wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
    align-items: stretch;
    align-self: stretch;
    margin-top: 0;
}

main.container {
    display: block;
    flex: 1 0 auto;
    margin-top: 0;
}

/* Header */
header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 10px 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    color: var(--primary-color);
    margin: 0;
    font-size: 1.5rem;
}

.user-menu {
    display: flex;
    align-items: center;
}

.user-menu .dropdown-toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--text-dark);
}

.user-menu .dropdown-toggle i {
    margin-left: 5px;
}

.user-menu .dropdown-menu {
    min-width: 10rem;
    margin-top: 0.5rem;
    padding: 0.5rem 0;
    border-radius: 0.25rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.user-menu .dropdown-item {
    padding: 0.5rem 1rem;
    color: var(--text-dark);
    text-decoration: none;
    display: block;
}

.user-menu .dropdown-item:hover {
    background-color: var(--pastel-blue);
}

/* Navbar */
.navbar {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 0;
}

.navbar .nav-item {
    margin: 0;
}

.navbar .nav-link {
    color: var(--text-light);
    padding: 1rem 1.5rem;
    position: relative;
}

.navbar .nav-link.active {
    background-color: var(--accent-color);
    color: white !important;
}

.navbar .nav-link.active i {
    color: white;
}

.navbar .nav-link:hover {
    background-color: var(--secondary-color);
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 1rem 0;
    margin-top: auto;
}

/* Cards */
.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.card-header {
    background-color: var(--pastel-blue);
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}

.card-body {
    padding: 20px;
}

.card-footer {
    background-color: #f8f9fa;
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
}

/* Forms */
.form-control {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 12px;
    width: 100%;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(82, 113, 255, 0.25);
}

.form-label {
    margin-bottom: 8px;
    font-weight: 500;
    display: block;
}

.form-group {
    margin-bottom: 20px;
}

/* Buttons */
.btn {
    display: inline-block;
    font-weight: 400;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 0.25rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    cursor: pointer;
}

.btn-primary {
    color: #fff;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.btn-secondary {
    color: #fff;
    background-color: #6c757d;
    border-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #545b62;
}

.btn-success {
    color: #fff;
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-danger {
    color: #fff;
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    line-height: 1.5;
    border-radius: 0.2rem;
}

/* Tabs */
.nav-tabs {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
    display: flex;
}

.nav-tabs .nav-item {
    margin-bottom: -1px;
    flex: 1;
    text-align: center;
}

.nav-tabs .nav-link {
    border: 1px solid transparent;
    border-top-left-radius: 0.25rem;
    border-top-right-radius: 0.25rem;
    padding: 0.75rem 1rem;
    display: block;
    text-decoration: none;
    color: var(--text-dark);
    background-color: var(--pastel-blue);
}

.nav-tabs .nav-link.active {
    color: var(--text-dark);
    background-color: #fff;
    border-color: var(--border-color) var(--border-color) #fff;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

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

.table thead th {
    vertical-align: bottom;
    border-bottom: 2px solid var(--border-color);
    background-color: var(--pastel-blue);
}

.table tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* Dashboard Widgets */
.stat-card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 20px;
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.stat-card i {
    font-size: 2.5rem;
    margin-right: 20px;
    color: var(--primary-color);
}

.stat-card .stat-content h2 {
    margin: 0;
    font-size: 1.5rem;
}

.stat-card .stat-content p {
    margin: 5px 0 0;
    color: #6c757d;
}

/* Receipt Display */
.receipt-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.receipt-item:last-child {
    border-bottom: none;
}

.receipt-item .name {
    flex: 3;
}

.receipt-item .quantity {
    flex: 1;
    text-align: center;
}

.receipt-item .price {
    flex: 1;
    text-align: right;
}

/* Image Preview Styling */
#imagePreview {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 300px;
    overflow: hidden;
}

#imagePreview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Debt Display */
.debt-arrow {
    font-size: 1.5rem;
    margin: 0 10px;
    color: var(--accent-color);
}

/* Pagination */
.pagination {
    display: flex;
    padding-left: 0;
    list-style: none;
    border-radius: 0.25rem;
}

.pagination .page-item:first-child .page-link {
    margin-left: 0;
    border-top-left-radius: 0.25rem;
    border-bottom-left-radius: 0.25rem;
}

.pagination .page-item:last-child .page-link {
    border-top-right-radius: 0.25rem;
    border-bottom-right-radius: 0.25rem;
}

.pagination .page-item.active .page-link {
    z-index: 1;
    color: #fff;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.pagination .page-link {
    position: relative;
    display: block;
    padding: 0.5rem 0.75rem;
    margin-left: -1px;
    line-height: 1.25;
    color: var(--primary-color);
    background-color: #fff;
    border: 1px solid var(--border-color);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.4);
}

.modal-content {
    background-color: #fff;
    margin: 10% auto;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    width: 80%;
    max-width: 600px;
    position: relative;
}

.modal-close {
    color: #aaa;
    position: absolute;
    right: 10px;
    top: 5px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.modal-close:hover,
.modal-close:focus {
    color: #000;
    text-decoration: none;
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 15px;
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
    margin-top: 15px;
    display: flex;
    justify-content: flex-end;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.toast {
    background-color: #fff;
    box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.1);
    border-radius: 0.25rem;
    border-left: 4px solid var(--primary-color);
    padding: 0.75rem 1.25rem;
    margin-bottom: 0.75rem;
    max-width: 350px;
    position: relative;
}

.toast.success {
    border-left-color: var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast.info {
    border-left-color: var(--info-color);
}

.toast .toast-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.toast .toast-close {
    background: transparent;
    border: 0;
    cursor: pointer;
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1;
    padding: 0;
    color: #6c757d;
    opacity: 0.5;
}

.toast .toast-body {
    font-size: 0.875rem;
}

/* Alert styles for server-side flash messages */
.alert {
    position: relative;
    padding: 0.75rem 1.25rem;
    margin-bottom: 1rem;
    border-radius: 0.25rem;
    border-left: 4px solid var(--primary-color);
    background-color: #fff;
    box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.1);
}

.alert-success {
    border-left-color: var(--success-color);
    background-color: var(--pastel-green);
}

.alert-error,
.alert-danger {
    border-left-color: var(--danger-color);
    background-color: var(--pastel-red);
}

.alert-warning {
    border-left-color: var(--warning-color);
    background-color: var(--pastel-yellow);
}

.alert-info {
    border-left-color: var(--info-color);
    background-color: var(--pastel-blue);
}

.alert-close {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: transparent;
    border: 0;
    cursor: pointer;
    font-size: 1.25rem;
    font-weight: 700;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.alert-close:hover {
    opacity: 1;
}

/* Fade Out Animation for alerts and toasts */
.fade-out {
    animation: fadeOut 0.3s ease forwards;
}

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

/* Navigation Tabs */
.nav-pills {
    display: flex;
    background-color: var(--pastel-blue);
    border-radius: 0.25rem;
    overflow: hidden;
    margin-bottom: 1rem;
}

.nav-pills .nav-item {
    flex: 1;
}

.nav-pills .nav-link {
    padding: 0.75rem 1rem;
    text-align: center;
    border-radius: 0;
    color: var(--text-dark);
    text-decoration: none;
    border: none;
    background: transparent;
    width: 100%;
}

.nav-pills .nav-link.active {
    background-color: #fff;
    color: var(--primary-color);
    font-weight: 500;
}

/* Bottom Navigation Bar for Mobile */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #fff;
    box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.bottom-nav ul {
    display: flex;
    justify-content: space-around;
    padding: 0;
    margin: 0;
    list-style: none;
}

.bottom-nav li {
    flex: 1;
    text-align: center;
}

.bottom-nav a {
    display: block;
    padding: 10px 0;
    color: var(--text-dark);
    text-decoration: none;
    font-size: 0.75rem;
}

.bottom-nav a i {
    display: block;
    font-size: 1.25rem;
    margin-bottom: 5px;
}

.bottom-nav a.active {
    color: white;
    background-color: var(--accent-color);
}

.bottom-nav a.active i {
    color: white;
}

/* Receipt Assignment */
.assignment-section {
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    padding: 1rem;
    background-color: #fff;
}

.assignment-section h3 {
    margin-top: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

.person-tag {
    display: inline-block;
    background-color: var(--pastel-blue);
    border-radius: 20px;
    padding: 5px 10px;
    margin-right: 5px;
    margin-bottom: 5px;
    font-size: 0.875rem;
}

.person-tag.selected {
    background-color: var(--primary-color);
    color: #fff;
}

.proportion-slider {
    width: 100%;
    margin: 1rem 0;
}

.proportion-value {
    font-weight: bold;
    margin-left: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .bottom-nav {
        display: block;
    }
    
    .navbar {
        display: none;
    }
    
    body {
        padding-bottom: 60px; /* Space for bottom nav */
    }
    
    .container {
        padding: 0 10px;
    }
    
    .stat-card {
        padding: 15px;
    }
    
    .stat-card i {
        font-size: 2rem;
        margin-right: 15px;
    }
    
    .modal-content {
        width: 95%;
        margin: 5% auto;
    }
    
    .card-header, .card-body, .card-footer {
        padding: 10px 15px;
    }
    
    .table th, .table td {
        padding: 0.5rem;
    }
}

/* Badge Styling */
.badge {
    --bs-badge-font-size: 1.00em;
}

.bg-info {
    --bs-badge-font-size: 0.75em;
}

/* Member Badge Styling */
.member-badge {
    padding: 8px 12px;
    font-size: 0.9rem;
    margin-right: 5px;
    margin-bottom: 5px;
    display: inline-flex;
    align-items: center;
    transition: all 0.2s ease;
}

.member-badge:hover {
    background-color: var(--accent-color);
}

.badge-remove-btn {
    cursor: pointer;
    opacity: 0.7;
    color: white;
}

.badge-remove-btn:hover {
    opacity: 1;
}

/* Member Toggle Styling */
.member-toggle {
    cursor: pointer;
    padding: 6px 10px;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
}

.member-toggle:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* We're using inline style display:none for better control */

.member-toggle.removed {
    animation: fadeIn 0.3s forwards;
}

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

/* How-to Steps Styling */
.how-to-steps .step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: bold;
    font-size: 1.1em;
}

.how-to-steps .step p {
    color: var(--text-dark);
    line-height: 1.6;
}

.how-to-steps .step a {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
}

.how-to-steps .step a:hover {
    text-decoration: underline;
}

/* Collapse Section Styling */
.btn-link {
    color: var(--primary-color);
    text-decoration: none;
}

.btn-link:hover {
    color: var(--accent-color);
}

.toggle-icon {
    transition: transform 0.3s;
}

[aria-expanded="true"] .toggle-icon {
    transform: rotate(180deg);
}

/* Receipt Card Styling */
.receipt-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.receipt-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.receipt-card-inner {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.receipt-card .card-header {
    background-color: var(--pastel-blue);
    padding: 10px 15px;
}

.receipt-card .card-title {
    font-size: 1.1rem;
    max-width: 70%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.receipt-card .card-body {
    flex: 1;
    padding: 15px;
}

.receipt-card .card-footer {
    padding: 10px 15px;
}

.receipt-card .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.85rem;
}

.receipt-card .badge {
    font-size: 0.7rem;
    padding: 0.35em 0.65em;
}

/* Search and Filter Controls */
#search-receipts {
    max-width: 200px;
}

.pagination-info {
    background-color: var(--pastel-blue);
    padding: 0.375rem 0.75rem;
    border-radius: 0.25rem;
    font-weight: 500;
}

/* Dark/Light Mode Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    margin-right: 1rem;
}

.theme-toggle label {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
    margin: 0;
}

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

.theme-toggle .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 30px;
}

.theme-toggle .slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

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

.theme-toggle input:checked + .slider:before {
    transform: translateX(30px);
}

.theme-toggle .sun-icon,
.theme-toggle .moon-icon {
    position: absolute;
    color: white;
    top: 6px;
    font-size: 16px;
}

.theme-toggle .sun-icon {
    left: 8px;
}

.theme-toggle .moon-icon {
    right: 8px;
}

/* Loading Spinners */
.spinner {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s linear infinite;
    margin-right: 0.5rem;
}

/* Dark variant for light backgrounds */
.spinner-dark {
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--primary-color);
}

/* Different sizes */
.spinner-sm {
    width: 1rem;
    height: 1rem;
    border-width: 2px;
}

.spinner-lg {
    width: 2rem;
    height: 2rem;
    border-width: 4px;
}

/* Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0% { transform: scale(0.8); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(0.8); opacity: 0.5; }
}

/* Button loading states */
.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.btn-loading .btn-text {
    visibility: hidden;
}

.btn-loading .spinner {
    position: absolute;
    left: calc(50% - 0.75rem);
    top: calc(50% - 0.75rem);
}

/* Additional button loading animations */
.btn-loading-slide .spinner {
    position: absolute;
    left: -2rem;
    top: calc(50% - 0.75rem);
    animation: slide-in 0.5s forwards;
}

.btn-loading-slide .btn-text {
    transition: transform 0.5s ease;
    transform: translateX(1rem);
    display: inline-block;
    visibility: visible;
}

@keyframes slide-in {
    0% { left: -2rem; opacity: 0; }
    100% { left: 0.75rem; opacity: 1; }
}

/* Pulse animation for spinners */
.spinner-pulse {
    animation: pulse 1.5s infinite;
}

/* Dots loading animation */
.loading-dots:after {
    content: '.';
    animation: dots 1.5s steps(5, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60% { content: '...'; }
    80%, 100% { content: ''; }
}

/* Specific for Receipt Item Assignment */
.item-assignment-container {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.assignment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.assignment-header h4 {
    margin: 0;
}

.assign-to-section h5 {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.person-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.person-button {
    background-color: var(--pastel-blue);
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
    cursor: pointer;
    font-size: 0.875rem;
}

.person-button.selected {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.split-proportion-container {
    margin-top: 1rem;
}

.proportion-slider-container {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}

.proportion-slider-container .person-name {
    width: 100px;
    flex-shrink: 0;
}

.proportion-slider-container .slider {
    flex-grow: 1;
    margin: 0 10px;
}

.proportion-slider-container .proportion-value {
    width: 50px;
    text-align: right;
    flex-shrink: 0;
}

.add-person-button {
    color: var(--primary-color);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
}

.add-person-button i {
    margin-right: 0.25rem;
}