:root{--indigo: #4F46E5;--indigo-bright: #6366F1;--bg: #0f172a;--panel: #1e293b;--border: #334155;--text: #e2e8f0;--muted: #94a3b8;color-scheme:dark}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,Segoe UI,Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}#app{max-width:960px;margin:0 auto;padding:24px 20px 60px}h1{font-size:20px;margin:0 0 4px}h2{font-size:16px;margin:24px 0 10px}a{color:var(--indigo-bright)}.topbar{display:flex;justify-content:space-between;align-items:center;padding-bottom:16px;margin-bottom:20px;border-bottom:1px solid var(--border)}.card{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:16px;margin-bottom:16px}table{width:100%;border-collapse:collapse;font-size:13px}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:600;text-transform:uppercase;font-size:11px}input,select,textarea{background:#0b1220;color:var(--text);border:1px solid var(--border);border-radius:5px;padding:7px 9px;font-size:13px;width:100%}label{display:block;font-size:12px;color:var(--muted);margin:10px 0 4px}button{background:var(--indigo);color:#fff;border:none;border-radius:6px;padding:8px 16px;font-size:13px;cursor:pointer;font-weight:600}button:hover{background:var(--indigo-bright)}button.secondary{background:transparent;border:1px solid var(--border);color:var(--text)}button.danger{background:#dc2626}.badge{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600}.badge.valid,.badge.active,.badge.paid{background:#16653433;color:#4ade80}.badge.expiring-soon,.badge.sent,.badge.draft{background:#713f1233;color:#fbbf24}.badge.expired,.badge.revoked,.badge.overdue{background:#7f1d1d33;color:#f87171}.badge.superseded,.badge.void{background:#33415533;color:var(--muted)}.error{color:#f87171;font-size:13px;margin:8px 0}.muted{color:var(--muted);font-size:12px}.row{display:flex;gap:10px;flex-wrap:wrap}.row>*{flex:1;min-width:140px}