:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #d97706;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 16px;
}

.site-header {
    background-color: var(--card);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.main-nav a {
    color: var(--text);
    text-decoration: none;
    padding: 6px 10px;
    border-radius: 6px;
    transition: background-color 0.15s;
}

.main-nav a:hover,
.main-nav a.active {
    background-color: var(--bg);
    color: var(--primary);
}

.user-info {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.flash {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
}

.flash-info {
    background-color: #dbeafe;
    color: #1e40af;
}

.flash-success {
    background-color: #dcfce7;
    color: #166534;
}

.flash-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.flash-error {
    background-color: #fee2e2;
    color: #991b1b;
}

.card {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.card-title {
    margin: 0 0 16px;
    font-size: 1.1rem;
    font-weight: 600;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.summary-card {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    text-align: center;
    box-shadow: var(--shadow);
}

.summary-card .label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

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

.summary-card .value.income {
    color: var(--success);
}

.summary-card .value.expense {
    color: var(--danger);
}

.btn {
    display: inline-block;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    background-color: var(--primary);
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    font-size: 0.95rem;
    transition: background-color 0.15s;
}

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

.btn-small {
    padding: 4px 10px;
    font-size: 0.85rem;
}

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

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

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

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

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    background-color: #fff;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.text-danger {
    color: var(--danger);
    font-size: 0.85rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--card);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

table thead {
    background-color: var(--bg);
}

table th,
table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

table tbody tr:hover {
    background-color: #f8fafc;
}

.amount {
    font-weight: 600;
}

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

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

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
}

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

.badge-expense {
    background-color: #fee2e2;
    color: #991b1b;
}

.actions {
    display: flex;
    gap: 8px;
}

.empty-tip {
    text-align: center;
    color: var(--text-muted);
    padding: 40px 0;
}

.filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    align-items: end;
    margin-bottom: 20px;
}

.filter-group {
    display: flex;
    flex-direction: column;
}

.filter-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.filter-group input,
.filter-group select {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.compare-section {
    margin-bottom: 24px;
}

.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background-color: var(--border);
    border-radius: 6px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary);
    transition: width 0.3s ease;
}

.progress-fill.danger {
    background-color: var(--danger);
}

.progress-fill.warning {
    background-color: var(--warning);
}

.budget-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.budget-card .progress-bar {
    margin-top: 12px;
}

.budget-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
}

@media (max-width: 640px) {
    .header-inner {
        flex-direction: column;
        height: auto;
        padding: 12px 0;
    }

    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
    }

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

    table {
        font-size: 0.9rem;
    }

    table th,
    table td {
        padding: 8px;
    }
}