/* CSS Variables */
:root {
    --primary: #ec0000;
    --primary-dark: #c00000;
    --secondary: #333;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --border-radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --transition: all 0.2s ease;
}

/* Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.5;
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* Login Screen */
#login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.login-container {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo h1 {
    color: var(--primary);
    font-size: 2rem;
    margin-bottom: 5px;
}

.logo p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* Forms */
.form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--secondary);
}

.form-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.form-inline {
    flex-direction: row;
    gap: 10px;
}

input[type="text"],
input[type="password"],
select {
    padding: 12px 16px;
    border: 1px solid var(--gray-light);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(236, 0, 0, 0.1);
}

.flex-grow {
    flex: 1;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

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

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

.btn-secondary:hover {
    background: #d4d9de;
}

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

.btn-danger:hover {
    background: #c82333;
}

.btn-full {
    width: 100%;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.85rem;
}

/* Error Message */
.error-message {
    background: #fdeaea;
    color: var(--danger);
    padding: 12px;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
}

/* App Layout */
#app {
    min-height: 100vh;
    padding-bottom: 70px;
}

.app-screen {
    padding-top: 60px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: white;
    border-bottom: 1px solid var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 100;
}

.header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

/* Content */
.content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Bottom Navigation */
.nav-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: white;
    border-top: 1px solid var(--gray-light);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 100;
}

.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--gray);
    transition: var(--transition);
}

.nav-btn.active {
    color: var(--primary);
}

.nav-icon {
    font-size: 1.5rem;
}

.nav-label {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--secondary);
}

/* Summary Card */
.summary-card {
    text-align: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.summary-label {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 8px;
}

.summary-value {
    font-size: 2.5rem;
    font-weight: 700;
}

.sync-status {
    margin-top: 12px;
    font-size: 0.85rem;
    opacity: 0.8;
}

/* Charts */
.chart-container {
    position: relative;
    height: 200px;
}

.chart-lg {
    height: 300px;
}

/* Transaction List */
.transaction-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.transaction-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: var(--light);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.transaction-item:hover {
    background: var(--gray-light);
}

.transaction-info {
    flex: 1;
    min-width: 0;
}

.transaction-merchant {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.transaction-meta {
    font-size: 0.85rem;
    color: var(--gray);
    display: flex;
    gap: 8px;
    align-items: center;
}

.transaction-category {
    background: var(--gray-light);
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 0.75rem;
}

.transaction-category.uncategorized {
    background: var(--warning);
    color: var(--dark);
}

.transaction-amount {
    font-weight: 600;
    color: var(--primary);
    white-space: nowrap;
}

/* Filters */
.filters {
    display: flex;
    gap: 10px;
}

.filter-select {
    flex: 1;
    padding: 10px;
}

/* Alert */
.alert {
    padding: 12px 16px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
}

/* Categories List */
.categories-list,
.rules-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.category-item,
.rule-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: var(--light);
    border-radius: var(--border-radius);
}

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

.category-item .default-badge {
    font-size: 0.75rem;
    color: var(--gray);
}

.rule-item .pattern {
    font-family: monospace;
    font-weight: 500;
}

.rule-item .category-badge {
    font-size: 0.85rem;
    color: var(--gray);
}

.rule-item .auto-badge {
    font-size: 0.7rem;
    background: var(--gray-light);
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 8px;
}

.delete-btn {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    padding: 4px 8px;
    font-size: 1.2rem;
}

/* Status Badge */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.status-badge.configured {
    background: #d4edda;
    color: #155724;
}

.status-badge.not-configured {
    background: #f8d7da;
    color: #721c24;
}

/* Merchant List (Stats) */
.merchant-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.merchant-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.merchant-details {
    text-align: right;
}

.merchant-total {
    font-weight: 600;
    color: var(--primary);
}

.merchant-count {
    font-size: 0.85rem;
    color: var(--gray);
}

/* Monthly Comparison */
#monthly-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.comparison-item {
    text-align: center;
}

.comparison-label {
    font-size: 0.85rem;
    color: var(--gray);
    margin-bottom: 4px;
}

.comparison-value {
    font-size: 1.5rem;
    font-weight: 600;
}

.comparison-value.positive {
    color: var(--success);
}

.comparison-value.negative {
    color: var(--danger);
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 200;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    padding: 24px;
    width: 100%;
    max-width: 400px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-content h3 {
    margin-bottom: 16px;
}

.modal-categories {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.modal-category-btn {
    padding: 12px;
    border: 1px solid var(--gray-light);
    border-radius: var(--border-radius);
    background: white;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
}

.modal-category-btn:hover {
    background: var(--light);
    border-color: var(--primary);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 300;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--gray-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Responsive */
@media (min-width: 768px) {
    .content {
        max-width: 800px;
        margin: 0 auto;
    }

    .login-container {
        padding: 50px;
    }

    .filters {
        max-width: 400px;
    }

    .chart-container {
        height: 250px;
    }

    .chart-lg {
        height: 350px;
    }
}

/* PWA Standalone Mode */
@media (display-mode: standalone) {
    body {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }

    .nav-bottom {
        padding-bottom: env(safe-area-inset-bottom);
        height: calc(70px + env(safe-area-inset-bottom));
    }
}