:root{--main-bg: #1E1E2E;--card-bg: #2A2A3E;--accent: #4F8EF7;--accent-hover: #3d79e6;--text-main: #e0e0e0;--text-muted: #a0b0c5;--text-light: #ffffff;--status-open: #E74C3C;--status-paid-start: #1A7A4A;--status-paid-end: #2ECC71;--status-overdue: #F39C12;--status-storniert: #555577;--font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--base-size: 14px;--label-size: 12px;--title-size: 18px;--sidebar-width: 260px;--radius: 8px;--spacing: 24px}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--main-bg);color:var(--text-main);font-family:var(--font-stack);font-size:var(--base-size);line-height:1.5;-webkit-font-smoothing:antialiased;height:100vh;display:flex}aside#sidebar{width:var(--sidebar-width);background-color:var(--card-bg);border-right:1px solid rgba(255,255,255,.05);display:flex;flex-direction:column;z-index:100}.logo-area{padding:32px 24px;border-bottom:1px solid rgba(255,255,255,.05)}.logo-text{font-size:16px;font-weight:800;color:var(--text-light);letter-spacing:.5px}.logo-text span{color:var(--accent)}nav#main-nav{flex:1;padding:16px}.nav-item{display:flex;align-items:center;padding:12px 16px;color:var(--text-muted);text-decoration:none;border-radius:var(--radius);margin-bottom:4px;transition:all .2s cubic-bezier(.4,0,.2,1);font-weight:500}.nav-item i{width:20px;margin-right:12px;font-size:16px}.nav-item:hover{background:#ffffff0d;color:var(--text-main)}.nav-item.active{background:var(--accent);color:var(--text-light)}.sidebar-footer{padding:24px;font-size:11px;color:var(--text-muted);opacity:.5;border-top:1px solid rgba(255,255,255,.05)}main#content-area{flex:1;overflow-y:auto;padding:40px;position:relative}.container{max-width:1400px;margin:0 auto}.page-title-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px}h1{font-size:var(--title-size);font-weight:700;color:var(--text-light)}.kpi-bar{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:32px}.kpi-card{background:var(--card-bg);padding:20px;border-radius:var(--radius);border:1px solid rgba(255,255,255,.03);box-shadow:0 4px 12px #0003}.kpi-card .label{font-size:11px;text-transform:uppercase;color:var(--text-muted);letter-spacing:.5px;font-weight:600}.kpi-card .value{font-size:22px;font-weight:800;color:var(--text-light);margin-top:4px}.kpi-card.urgent{border-left:4px solid var(--status-open)}.kpi-card.pending{border-left:4px solid var(--status-overdue)}.kpi-card.success{border-left:4px solid var(--status-paid-end)}.card-table{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;box-shadow:0 4px 20px #0003}table{width:100%;border-collapse:collapse}th{background:#0000001a;padding:16px;text-align:left;font-size:12px;color:var(--text-muted);text-transform:uppercase;font-weight:600;border-bottom:1px solid rgba(255,255,255,.05)}td{padding:16px;border-bottom:1px solid rgba(255,255,255,.03);vertical-align:middle}tr.status-open td{border-left:3px solid var(--status-open)}tr.status-overdue td{border-left:3px solid var(--status-overdue)}tr.status-paid{background:linear-gradient(to right,var(--status-paid-start),var(--status-paid-end))}tr.status-paid td{color:#fff;border-bottom:1px solid rgba(255,255,255,.1)}tr.status-storniert td{color:var(--status-storniert);text-decoration:line-through}.badge{padding:4px 8px;border-radius:4px;font-size:10px;font-weight:800;text-transform:uppercase}.badge-open{background:var(--status-open);color:#fff}.badge-overdue{background:var(--status-overdue);color:#fff}.badge-paid{background:#fff;color:var(--status-paid-start)}.badge-storniert{background:var(--status-storniert);color:#fff}.btn{display:inline-flex;align-items:center;padding:10px 18px;border-radius:var(--radius);font-weight:600;cursor:pointer;border:none;font-size:13px;transition:all .2s ease;gap:8px;text-decoration:none}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn-outline{background:#ffffff0d;color:var(--text-main);border:1px solid rgba(255,255,255,.1)}.btn-outline:hover{background:#ffffff1a}.btn-icon{width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border-radius:6px;background:#ffffff0d;color:var(--text-muted);border:none;cursor:pointer;transition:all .2s}.btn-icon:hover{background:#ffffff26;color:#fff}.form-group{margin-bottom:20px}label{display:block;font-size:12px;color:var(--text-muted);margin-bottom:6px;font-weight:500}input,select,textarea{width:100%;background:#0003;border:1px solid rgba(255,255,255,.08);border-radius:6px;padding:12px;color:var(--text-main);font-family:inherit}input:focus{outline:none;border-color:var(--accent);background:#0000004d}#view-container{animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){body{flex-direction:column}aside#sidebar{width:100%;height:auto;position:fixed;bottom:0;border-right:none;border-top:1px solid rgba(255,255,255,.05)}.logo-area,.sidebar-footer{display:none}nav#main-nav{display:flex;justify-content:space-around;padding:8px}.nav-item{flex-direction:column;padding:8px;font-size:10px;margin-bottom:0}.nav-item i{margin-right:0;margin-bottom:4px}main#content-area{padding:20px 20px 100px}}#a4-preview{background:#fff;color:#000;width:210mm;min-height:297mm;padding:15mm;margin:0 auto;box-shadow:0 10px 40px #00000080;font-family:Helvetica,Arial,sans-serif}@media print{body{background:#fff!important;color:#000!important}aside#sidebar,main#content-area,button,.quick-actions,.page-title-row{display:none!important}#print-container,#a4-preview{display:block!important;visibility:visible!important;position:absolute;left:0;top:0;width:100%;margin:0;padding:0}#a4-preview{width:210mm;padding:15mm;box-shadow:none!important}}.flex{display:flex}.justify-between{justify-content:space-between}.align-center{align-items:center}.flex-wrap{flex-wrap:wrap}.text-right{text-align:right}.mb-4{margin-bottom:16px}.mt-4{margin-top:16px}.gap-12{gap:12px}.gap-16{gap:16px}.gap-32{gap:32px}.col-form,.col-preview{min-width:0}.card{background:var(--card-bg);padding:24px;border-radius:var(--radius);border:1px solid rgba(255,255,255,.05);margin-bottom:24px}section.card h2{color:var(--accent);text-transform:uppercase;letter-spacing:1px;font-weight:700}.items-table{width:100%;margin-top:10px}.items-table td{padding:4px;border:none}.items-table input{padding:8px 12px;font-size:13px}.items-table .btn-icon{opacity:.6}.items-table .btn-icon:hover{opacity:1;color:var(--status-open)}.items-table.hide-qty tr td:nth-child(1),.items-table.hide-qty tr td:nth-child(3){display:none}