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

:root {
    --primary: #7C9EE8;
    --primary-light: #E8EFFC;
    --success: #86C5A8;
    --success-light: #E8F5EE;
    --danger: #E8908E;
    --danger-light: #FCE8E7;
    --warning: #E8C58E;
    --warning-light: #FCF3E0;
    --bg: #F7F8FC;
    --card-bg: #FFFFFF;
    --text: #2D3748;
    --text-muted: #718096;
    --border: #E2E8F0;
    --shadow: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.06);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.navbar {
    background: var(--card-bg);
    box-shadow: var(--shadow);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.nav-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-icon {
    font-size: 24px;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-menu a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s;
}

.nav-menu a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

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

/* Main container */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
    width: 100%;
    flex: 1;
}

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 4px;
}

/* Cards & Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}

.stat-card.success { border-left-color: var(--success); }
.stat-card.danger { border-left-color: var(--danger); }
.stat-card.warning { border-left-color: var(--warning); }

.stat-label {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 26px;
    font-weight: 700;
    margin-top: 8px;
    color: var(--text);
}

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

.stat-detail {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 4px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 24px;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

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

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

.form-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
}

.form-input, .form-select, .form-textarea {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s;
    background: var(--card-bg);
    color: var(--text);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: #6A8ED4;
    transform: translateY(-1px);
}

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

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

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

.btn-secondary:hover {
    background: #CBD5E0;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-icon {
    padding: 6px 10px;
    font-size: 12px;
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: 8px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.table th {
    background: var(--bg);
    padding: 12px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

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

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

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-success {
    background: var(--success-light);
    color: #2F7A56;
}

.badge-danger {
    background: var(--danger-light);
    color: #A84542;
}

.amount-positive {
    color: var(--success);
    font-weight: 600;
}

.amount-negative {
    color: var(--danger);
    font-weight: 600;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
    font-weight: 500;
}

.alert-success {
    background: var(--success-light);
    color: #2F7A56;
    border: 1px solid #B8DDC8;
}

.alert-error {
    background: var(--danger-light);
    color: #A84542;
    border: 1px solid #F0BBBA;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.empty-state-text {
    font-size: 14px;
}

/* Filter bar */
.filter-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: end;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.filter-bar .form-group {
    min-width: 140px;
    flex: 1;
}

/* Two column layout */
.two-col {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 24px;
}

@media (max-width: 768px) {
    .two-col {
        grid-template-columns: 1fr;
    }
    .nav-menu {
        width: 100%;
        justify-content: space-around;
    }
    .nav-menu a {
        padding: 6px 10px;
        font-size: 13px;
    }
}

/* Footer */
.footer {
    background: var(--card-bg);
    padding: 16px 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    border-top: 1px solid var(--border);
}

/* Print styles */
@media print {
    .navbar, .footer, .no-print, .btn {
        display: none !important;
    }
    body {
        background: white;
    }
    .main-container {
        padding: 0;
        max-width: 100%;
    }
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        break-inside: avoid;
    }
    .stat-card {
        border: 1px solid #ddd;
    }
}

/* Action buttons group */
.action-group {
    display: flex;
    gap: 4px;
}

/* Summary table */
.summary-row {
    background: var(--primary-light) !important;
    font-weight: 600;
}

.summary-row td {
    border-top: 2px solid var(--primary) !important;
}

/* Chart containers */
.chart-container {
    height: 300px;
    margin-top: 16px;
}

/* Print header */
.print-header {
    display: none;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--text);
}

@media print {
    .print-header {
        display: block;
    }
}

.print-header h1 {
    font-size: 20px;
    margin-bottom: 4px;
}

.print-header p {
    font-size: 13px;
    color: var(--text-muted);
}