:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Dark mode */
[data-theme="dark"] {
    --primary-color: #3b82f6;
    --secondary-color: #94a3b8;
    --success-color: #34d399;
    --warning-color: #fbbf24;
    --danger-color: #f87171;
    --background: #0f172a;
    --surface: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Theme Toggle */
.btn-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    min-width: 40px;
    cursor: pointer;
    transition: all 0.2s;
}

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

.theme-icon {
    font-size: 1.2rem;
    display: block;
}

.auth-theme-toggle {
    position: fixed;
    top: 10px;
    right: 10px;
    z-index: 1000;
}

.auth-theme-toggle .btn-icon {
    background: var(--surface);
    box-shadow: var(--shadow);
}

/* Hide auth theme toggle when logged in */
.navbar:not(.hidden) ~ .container .auth-theme-toggle,
body:has(.navbar:not(.hidden)) .auth-theme-toggle {
    display: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Navigation */
.navbar {
    background: var(--surface);
    box-shadow: var(--shadow);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar.hidden {
    display: none;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

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

/* User Menu Dropdown */
.user-menu {
    position: relative;
}

.user-menu-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.user-menu-button:hover {
    background: var(--surface);
    border-color: var(--primary-color);
}

.dropdown-arrow {
    font-size: 0.75rem;
    transition: transform 0.2s;
}

.user-menu-button.active .dropdown-arrow {
    transform: rotate(180deg);
}

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 200px;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    display: none;
    flex-direction: column;
    z-index: 1000;
    overflow: hidden;
}

.user-menu-dropdown.active {
    display: flex;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 0.95rem;
}

.menu-item:hover {
    background: var(--background);
}

.menu-item span:first-child {
    font-size: 1.1rem;
}

.menu-item.logout {
    color: var(--danger-color);
}

.menu-item.logout:hover {
    background: rgba(239, 68, 68, 0.1);
}

.menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.25rem 0;
}

.nav-burger {
    display: none;
}

.nav-burger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

.nav-burger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.nav-burger.active span:nth-child(2) {
    opacity: 0;
}

.nav-burger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Pages */
.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

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

/* Auth Pages */
.auth-container {
    max-width: 400px;
    width: 100%;
    margin: 4rem auto;
    background: var(--surface);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    box-sizing: border-box;
}

.auth-container h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.auth-switch {
    text-align: center;
    margin-top: 1rem;
    color: var(--text-secondary);
}

.auth-switch a {
    color: var(--primary-color);
    text-decoration: none;
}

.auth-switch a:hover {
    text-decoration: underline;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group .checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: normal;
    cursor: pointer;
}

.form-group .checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
    cursor: pointer;
}

.form-group .checkbox-label span {
    user-select: none;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    max-width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s;
    box-sizing: border-box;
}

/* Specific fix for date inputs on iOS */
.form-group input[type="date"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-block;
    text-decoration: none;
    min-width: fit-content;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    /* Preserve button width when disabled */
    min-width: inherit;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #1d4ed8;
}

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

.btn-secondary:hover:not(:disabled) {
    background: #475569;
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: #059669;
}

.btn-warning {
    background: var(--warning-color);
    color: white;
}

.btn-warning:hover:not(:disabled) {
    background: #d97706;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-block {
    width: 100%;
}

/* Dashboard */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.reports-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.report-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.report-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.report-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.report-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.report-card-stats {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.report-card-stat {
    display: flex;
    justify-content: space-between;
}

/* Report Detail */
.report-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.report-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.report-summary {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.summary-item {
    display: flex;
    flex-direction: column;
}

.summary-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.summary-item span:last-child {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Receipts */
.receipts-container {
    display: grid;
    gap: 1rem;
}

.receipt-card {
    background: var(--surface);
    border-radius: 8px;
    box-shadow: var(--shadow);
    overflow: hidden;
    display: grid;
    grid-template-columns: auto 200px 1fr auto;
    transition: transform 0.2s;
}

.receipt-card:hover {
    transform: translateX(4px);
}

.receipt-reorder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0.25rem;
    gap: 0.2rem;
    background: var(--background);
    border-right: 1px solid var(--border-color);
    min-height: 150px; /* Match image height */
}

.receipt-position {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.15rem 0;
    line-height: 1;
}

.btn-icon {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.75rem;
    transition: all 0.2s;
}

.btn-icon-small {
    width: 24px;
    height: 24px;
    font-size: 0.6rem;
    padding: 0;
}

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

.btn-icon:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.receipt-image {
    width: 200px;
    height: 150px;
    min-height: 150px;
    max-height: 150px;
    object-fit: cover;
    background: var(--background);
    transition: transform 0.2s, opacity 0.2s;
    display: block;
}

.receipt-image.clickable {
    cursor: pointer;
}

.receipt-image.clickable:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

.receipt-pdf-icon {
    width: 200px;
    height: 150px;
    min-height: 150px;
    max-height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--background);
    color: var(--text-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 4px;
    position: relative;
    transition: all 0.2s;
}

.receipt-pdf-icon.clickable {
    cursor: pointer;
}

.receipt-pdf-icon.clickable:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
    background: var(--surface);
}

.receipt-pdf-icon svg {
    opacity: 0.6;
}

.preview-hint {
    font-size: 0.75rem;
    margin-top: 0.5rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.receipt-pdf-icon.clickable:hover .preview-hint {
    opacity: 1;
}

.modal-large .modal-content {
    max-width: 90vw;
    max-height: 90vh;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    font-weight: 300;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
}

.modal-close:hover {
    color: white;
    background: var(--danger-color, #ef4444);
    transform: rotate(90deg);
}

.receipt-details {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.receipt-date {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.receipt-amount {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.receipt-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.receipt-actions {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    justify-content: center;
}

.receipt-actions .btn {
    min-width: 100px;
    width: 100%; /* Make buttons fill container */
    box-sizing: border-box;
}

/* Badge */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-open {
    background: #dcfce7;
    color: #166534;
}

.badge-closed {
    background: #f3f4f6;
    color: #4b5563;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.2s;
    overflow-y: auto;
}

.modal[style*="display: flex"] {
    display: flex !important;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--surface);
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s;
    box-sizing: border-box;
}

.modal-content * {
    box-sizing: border-box;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

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

.modal-header h2 {
    margin: 0;
}

.close {
    font-size: 2rem;
    font-weight: 300;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
}

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

.modal form {
    padding: 1.5rem;
}

/* Account Info */
.account-info {
    padding: 1.5rem;
}

.account-info p {
    display: flex;
    gap: 0.5rem;
    margin: 0.75rem 0;
    align-items: baseline;
}

.account-info strong {
    min-width: 100px;
    color: var(--text-secondary);
    font-weight: 500;
}

.account-info + hr {
    margin: 0 1.5rem;
}

.account-info + hr + h3 {
    padding: 0 1.5rem;
    margin-top: 1rem;
}

/* Image Preview */
.image-preview {
    margin: 1rem 0;
    text-align: center;
}

.image-preview img {
    max-width: 100%;
    max-height: 300px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

/* Password Strength Indicator */
.password-strength {
    margin-top: 0.5rem;
}

.password-strength-bar {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 0.25rem;
}

.password-strength-fill {
    height: 100%;
    width: 0;
    transition: width 0.3s ease, background-color 0.3s ease;
}

.password-strength-fill.weak {
    width: 33%;
    background-color: var(--danger-color);
}

.password-strength-fill.medium {
    width: 66%;
    background-color: var(--warning-color);
}

.password-strength-fill.strong {
    width: 100%;
    background-color: var(--success-color);
}

#password-strength-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
}

#strength-level {
    font-weight: 600;
}

#strength-level.weak {
    color: var(--danger-color);
}

#strength-level.medium {
    color: var(--warning-color);
}

#strength-level.strong {
    color: var(--success-color);
}

/* Password Requirements */
.password-requirements {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: var(--background);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.password-requirements small {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.requirement {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.requirement.met {
    color: var(--success-color);
}

.req-icon {
    font-size: 1rem;
    font-weight: bold;
}

.requirement.met .req-icon {
    content: '✓';
}

.password-match {
    display: block;
    margin-top: 0.25rem;
    font-weight: 500;
}

.password-match.match {
    color: var(--success-color);
}

.password-match.no-match {
    color: var(--danger-color);
}

/* Error Message */
.error-message {
    color: var(--danger-color);
    background: #fee2e2;
    padding: 0.75rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    display: none;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: monospace;
    font-size: 0.875rem;
}

.error-message.active {
    display: block;
}

/* Success Message */
.success-message {
    color: #166534;
    background: #dcfce7;
    padding: 0.75rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    display: none;
}

.success-message.active {
    display: block;
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

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

/* Admin Panel */
.admin-tabs {
    display: flex;
    gap: 0.5rem;
    margin: 2rem 0 1rem 0;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--primary-color);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

#users-table-container,
#admin-reports-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.admin-table {
    width: 100%;
    min-width: 800px;
    border-collapse: collapse;
    background: var(--surface);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-top: 1rem;
}

.admin-table thead {
    background: var(--background);
}

.admin-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
}

.admin-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.admin-table tr:hover {
    background: var(--background);
}

.admin-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 500;
}

.admin-badge.yes {
    background: #dcfce7;
    color: #166534;
}

.admin-badge.no {
    background: #f3f4f6;
    color: #6b7280;
}

.status-locked {
    color: var(--danger-color);
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    /* Mobile - dropdown menu works fine on mobile too */
    
    .receipt-card {
        grid-template-columns: 1fr;
    }

    .receipt-reorder {
        flex-direction: row;
        padding: 0.75rem;
        gap: 1rem;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .receipt-image,
    .receipt-pdf-icon {
        width: 100%;
        height: 200px;
    }

    .receipt-actions {
        flex-direction: row;
        justify-content: center;
    }

    .report-header {
        flex-direction: column;
        align-items: stretch;
    }

    .report-actions {
        width: 100%;
    }

    .report-actions button {
        flex: 1;
    }

    .dashboard-header {
        flex-direction: column;
        align-items: stretch;
    }

    .reports-grid {
        grid-template-columns: 1fr;
    }

    /* Fix modal on mobile */
    .modal-content {
        width: 95%;
        max-width: 95vw;
        margin: 1rem auto;
        padding: 0;
    }

    .modal-content form {
        padding: 1.5rem;
    }

    /* Ensure form elements don't overflow - AGGRESSIVE */
    .form-group {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }

    .form-group input[type="date"],
    .form-group input[type="number"],
    .form-group input[type="text"],
    .form-group input[type="email"],
    .form-group input[type="password"],
    .form-group input[type="file"],
    .form-group select,
    .form-group textarea {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        font-size: 16px; /* Prevents iOS zoom on focus */
        -webkit-appearance: none;
        box-sizing: border-box !important;
    }

    /* Extra specific for date inputs */
    input[type="date"] {
        width: 100% !important;
        max-width: 100% !important;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    .auth-container {
        margin: 2rem 10px;
        padding: 1.5rem;
        max-width: 100%;
    }

    /* Make theme toggle smaller on small screens */
    .auth-theme-toggle {
        top: 5px;
        right: 5px;
    }

    .auth-theme-toggle .btn-icon {
        padding: 0.4rem;
        min-width: 36px;
    }

    .theme-icon {
        font-size: 1rem;
    }

    /* Adjust navigation for small screens */
    .nav-menu {
        gap: 0.5rem;
    }

    .nav-user {
        display: none; /* Hide username on very small screens */
    }

    /* Even more aggressive on very small screens */
    .modal-content {
        width: 98%;
        max-width: 98vw;
        margin: 0.5rem auto;
    }

    .modal-content form {
        padding: 1rem;
    }
}