/* FamilyCashFlow - Modern Finance App Styles */

/* === CSS Variables === */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #64748b;
    --color-success: #10b981;
    --color-success-bg: #d1fae5;
    --color-danger: #ef4444;
    --color-danger-bg: #fee2e2;
    --color-warning: #f59e0b;
    --color-warning-bg: #fef3c7;
    --color-info: #3b82f6;
    
    /* Neutrals */
    --color-bg: #f8fafc;
    --color-bg-card: #ffffff;
    --color-bg-dark: #1e293b;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-light: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-dark: #cbd5e1;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px 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);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* === Reset & Base === */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--space-md);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

/* === Layout === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* === Navigation === */
.navbar {
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-brand a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-links {
    display: flex;
    gap: var(--space-sm);
}

.nav-link {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background: var(--color-bg);
    color: var(--color-primary);
}

.nav-link.active {
    background: var(--color-primary);
    color: white;
}

/* Logout is a POST form so it carries a CSRF token, but it has to keep looking
   like the links next to it. */
.nav-logout-form {
    display: inline;
}

button.nav-logout {
    background: none;
    border: none;
    font: inherit;
    cursor: pointer;
}

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

.nav-logout:hover {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

/* === Cards === */
.card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-lg);
}

.card-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.card-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

.btn-link {
    background: transparent;
    color: var(--color-primary);
    padding: var(--space-sm) 0;
}

.btn-block {
    width: 100%;
}

.btn-small {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.875rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* === Forms === */
.form-group {
    margin-bottom: var(--space-md);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-hint {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.form-actions {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
}

/* === Alerts === */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    font-weight: 500;
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.alert-error {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

/* === Tables === */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th {
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

/* === Auth Pages === */
.auth-container {
    min-height: calc(100vh - 100px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--color-bg-card);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.auth-title {
    text-align: center;
    margin-bottom: var(--space-sm);
}

.auth-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-lg);
    color: var(--color-text-secondary);
}

/* === Dashboard === */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.filter-form {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    align-items: center;
}

.filter-form select {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    cursor: pointer;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    font-size: 2rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-expenses .stat-value { color: var(--color-danger); }
.stat-income .stat-value { color: var(--color-success); }
.stat-balance.positive .stat-value { color: var(--color-success); }
.stat-balance.negative .stat-value { color: var(--color-danger); }

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-lg);
}

/* === Category List === */
.category-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.category-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xs);
}

.category-name {
    font-weight: 500;
}

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

.category-amount {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.category-amount.expense { color: var(--color-danger); }
.category-amount.income { color: var(--color-success); }

.category-bar {
    height: 8px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.category-bar-fill {
    height: 100%;
    border-radius: var(--radius-sm);
    transition: width var(--transition-normal);
}

.category-bar-fill.expense { background: var(--color-danger); }
.category-bar-fill.income { background: var(--color-success); }

.category-item {
    padding: var(--space-sm) 0;
}

.category-item > .category-summary {
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-left: 1.25rem;
}

.category-item > .category-summary::-webkit-details-marker {
    display: none;
}

/* Disclosure arrow, dimmed for categories without subcategories. */
.category-item > .category-summary::before {
    content: "▸";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-text-secondary);
    transition: transform 0.15s ease;
}

.category-item[open] > .category-summary::before {
    transform: rotate(90deg);
}

.category-item.is-leaf > .category-summary::before {
    opacity: 0.25;
}

.category-share {
    font-weight: 400;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-left: var(--space-xs);
}

/* === Subcategory drill-down === */
.subcategory-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin: var(--space-sm) 0 var(--space-xs) var(--space-md);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border, rgba(0, 0, 0, 0.1));
}

.subcategory-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) 0;
    text-decoration: none;
    color: inherit;
}

.subcategory-item:hover {
    color: var(--color-primary, inherit);
}

.subcategory-name {
    font-size: 0.9375rem;
}

.subcategory-count {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.subcategory-amount {
    font-weight: 600;
    font-size: 0.9375rem;
    white-space: nowrap;
}

.subcategory-amount.expense { color: var(--color-danger); }
.subcategory-amount.income { color: var(--color-success); }

.subcategory-bar {
    grid-column: 1 / -1;
    display: block;
    height: 4px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.subcategory-bar-fill {
    display: block;
    height: 100%;
    border-radius: var(--radius-sm);
}

.subcategory-bar-fill.expense { background: var(--color-danger); }
.subcategory-bar-fill.income { background: var(--color-success); }

.subcategory-empty {
    margin: var(--space-xs) 0 0 var(--space-md);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.header-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-md);
}

/* === Date range filter === */
.filter-date {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.filter-date input[type="date"] {
    font: inherit;
    color: var(--color-text);
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-border, rgba(0, 0, 0, 0.15));
    border-radius: var(--radius-sm);
    background: var(--color-surface, #fff);
}

.filter-summary {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin: 0 0 var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.back-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

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

/* === Active filter chip === */
.active-filter {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.active-filter-label {
    color: var(--color-text-secondary);
}

.active-filter-value {
    font-weight: 600;
}

.active-filter-clear {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    line-height: 1;
}

/* === Transaction List === */
.transaction-list {
    display: flex;
    flex-direction: column;
}

.transaction-list.compact .transaction-item {
    display: grid;
    grid-template-columns: 50px 1fr auto;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.tx-description {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tx-amount {
    font-weight: 600;
}

.tx-amount.expense, .amount.expense { color: var(--color-danger); }
.tx-amount.income, .amount.income { color: var(--color-success); }

/* === Upload === */
.upload-dropzone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-md);
}

.upload-dropzone:hover,
.upload-dropzone.dragover {
    border-color: var(--color-primary);
    background: rgba(99, 102, 241, 0.05);
}

.dropzone-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--space-md);
}

.dropzone-hint {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
}

.file-name {
    flex: 1;
    font-weight: 500;
}

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

/* === Status Badges === */
.status-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-pending { background: var(--color-warning-bg); color: var(--color-warning); }
.status-processing { background: rgba(59, 130, 246, 0.1); color: var(--color-info); }
.status-completed { background: var(--color-success-bg); color: var(--color-success); }
.status-error { background: var(--color-danger-bg); color: var(--color-danger); }

.category-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.category-badge.uncategorized {
    background: var(--color-secondary);
}

.subcategory-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-left: var(--space-sm);
}

/* === Modal === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.modal.open {
    display: flex;
}

.modal-content {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: var(--space-xs);
    line-height: 1;
}

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

/* === Pagination === */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.btn-danger {
    background-color: #dc3545;
    color: #fff;
    border: none;
}

.page-intro {
    color: var(--color-text-muted, #666);
    margin-bottom: var(--space-lg);
    max-width: 70ch;
}

.override-orphan {
    color: #dc3545;
    font-weight: 600;
    cursor: help;
}

.pagination-top {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.page-info {
    color: var(--color-text-secondary);
}

/* === Export Section === */
.export-section {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.export-buttons {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

/* === Settings === */
.settings-form {
    max-width: 500px;
}

.form-section {
    margin-bottom: var(--space-xl);
}

.form-section h2 {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

.form-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.user-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.info-row {
    display: flex;
    gap: var(--space-md);
}

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

/* === Empty State === */
.empty-message {
    text-align: center;
    color: var(--color-text-secondary);
    padding: var(--space-xl);
}

/* === Footer === */
.footer {
    text-align: center;
    padding: var(--space-lg);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* === Responsive === */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .table-transactions {
        font-size: 0.875rem;
    }
    
    .table-transactions th:nth-child(2),
    .table-transactions td:nth-child(2) {
        max-width: 150px;
    }
}