:root{--bg-color: #ffffff;--text-color: #000000;--grey-color: #666666;--border-color: #000000;--error-color: #dc2626;--success-color: #16a34a}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.5}.container{max-width:1100px;margin:0 auto;padding:16px}h1{font-size:24px;font-weight:600;text-transform:lowercase}h2{font-size:18px;font-weight:600;text-transform:lowercase}h3{font-size:14px;font-weight:600;text-transform:lowercase}a{color:var(--text-color)}.text-grey{color:var(--grey-color)}.text-error{color:var(--error-color)}.text-success{color:var(--success-color)}.text-small{font-size:12px}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.flex{display:flex}.flex-wrap{flex-wrap:wrap}.justify-between{justify-content:space-between}.items-center{align-items:center}.gap-1{gap:8px}.gap-2{gap:16px}.nav-tabs{display:flex;gap:16px;border-bottom:1px solid var(--border-color);margin-bottom:24px;overflow-x:auto}.nav-tab{padding:8px 0;font-size:14px;color:var(--grey-color);text-decoration:none;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}.nav-tab:hover{color:var(--text-color)}.nav-tab.active{color:var(--text-color);border-bottom-color:var(--text-color)}.footer{margin-top:32px;padding-top:16px;border-top:1px solid var(--border-color);color:var(--grey-color);font-size:12px}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-bottom:24px}.stat-card{border:1px solid var(--border-color);padding:16px}.stat-value{font-size:24px;font-weight:600}.stat-label{font-size:12px;color:var(--grey-color);text-transform:lowercase}table{width:100%;border-collapse:collapse}th{text-align:left;padding:8px;border-bottom:2px solid var(--border-color);font-size:12px;text-transform:lowercase;font-weight:600;cursor:pointer}th:hover{background:#f5f5f5}td{padding:8px;border-bottom:1px solid #eee;font-size:14px}tr:hover td{background:#fafafa}th:last-child,td:last-child{text-align:right}th.sorted{color:var(--text-color)}th.sorted:after{content:" ↓"}th.sorted.asc:after{content:" ↑"}.status-badge{display:inline-block;padding:2px 8px;font-size:11px;text-transform:lowercase;border:1px solid}.status-draft{color:#666;border-color:#666}.status-sent{color:#2563eb;border-color:#2563eb}.status-paid{color:var(--success-color);border-color:var(--success-color);background:#dcfce7}.status-overdue{color:var(--error-color);border-color:var(--error-color)}.filters{display:flex;gap:12px;margin-bottom:16px;flex-wrap:wrap;align-items:center}.filters select,.filters input{padding:6px 10px;border:1px solid var(--border-color);font-family:inherit;font-size:14px;background:#fff}.filters input[type=date]{min-width:140px}.empty-state{text-align:center;padding:40px;color:var(--grey-color)}.section{margin-bottom:32px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.revenue-bar{display:flex;height:24px;border:1px solid var(--border-color);margin-bottom:16px}.revenue-bar-segment{height:100%}.revenue-bar-paid{background:#dcfce7}.revenue-bar-outstanding{background:#fef3c7}.revenue-bar-draft{background:#f3f4f6}.table-container{overflow-x:auto;margin:0 -16px;padding:0 16px}@media (max-width: 768px){.nav-tabs{gap:12px}.nav-tab{font-size:13px}.stats-grid{grid-template-columns:repeat(2,1fr)}.filters{flex-direction:column;align-items:stretch}.filters select,.filters input{width:100%}}