:root{--bg:#f6f7f9;--surface:#fff;--border:#e3e6ea;--text:#1a1d21;--text-muted:#6b7280;--brand:#2f5d50;--brand-contrast:#fff;--status-draft:#6b7280;--status-sent:#2563eb;--status-paid:#16a34a;--status-overdue:#dc2626}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}a{color:inherit}.layout{display:flex;min-height:100vh}.sidebar{width:220px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);padding:1.5rem 1rem}.brand{font-weight:700;font-size:1.1rem;margin-bottom:2rem;color:var(--brand)}.nav-link{display:block;padding:.5rem .75rem;border-radius:8px;text-decoration:none;color:var(--text);margin-bottom:.25rem;font-size:.95rem}.nav-link:hover{background:var(--bg)}.main{flex:1 1;padding:2rem 2.5rem;max-width:1000px}h1{font-size:1.5rem;margin-bottom:.25rem}.subtitle{color:var(--text-muted);margin-bottom:1.5rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:.75rem 1rem;border-bottom:1px solid var(--border);font-size:.9rem}th{color:var(--text-muted);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.03em}tr:last-child td{border-bottom:none}.badge{display:inline-block;padding:.15rem .6rem;border-radius:999px;font-size:.75rem;font-weight:600;color:#fff}.badge-draft{background:var(--status-draft)}.badge-sent{background:var(--status-sent)}.badge-paid{background:var(--status-paid)}.badge-overdue{background:var(--status-overdue)}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));grid-gap:1rem;gap:1rem;margin-bottom:2rem}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1rem 1.25rem}.stat-value{font-size:1.6rem;font-weight:700}.stat-label{color:var(--text-muted);font-size:.85rem}.sidebar-user{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--border)}.sidebar-user-name{font-weight:600;font-size:.9rem}.sidebar-user-role{color:var(--text-muted);font-size:.8rem;margin-bottom:.5rem}.logout-button{border:none;background:none;cursor:pointer;font:inherit;text-align:left;width:100%;color:var(--status-overdue)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.auth-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:2rem;width:100%;max-width:340px}.auth-brand,.auth-card h1{margin-bottom:1.5rem}.auth-brand{font-weight:700;font-size:1.1rem;color:var(--brand)}.field{margin-bottom:1rem}.field label{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:.25rem}.field input,.field select{width:100%;padding:.55rem .7rem;border:1px solid var(--border);border-radius:8px;font-size:.95rem;background:var(--surface);color:var(--text)}.auth-error{color:var(--status-overdue);font-size:.85rem;margin-bottom:1rem}.auth-hint{color:var(--text-muted);font-size:.8rem;margin-top:1rem}.button-primary{width:100%;padding:.6rem;border:none;border-radius:8px;background:var(--brand);color:var(--brand-contrast);font-weight:600;cursor:pointer;font-size:.95rem}.button-primary:disabled{opacity:.6;cursor:default}.button-inline{display:inline-block;width:auto;padding:.5rem 1rem;text-decoration:none}.button-secondary{border:1px solid var(--border);border-radius:8px;color:var(--text)}.button-danger,.button-secondary{padding:.5rem 1rem;background:var(--surface);font-weight:600;cursor:pointer;font-size:.9rem}.button-danger{border:1px solid var(--status-overdue);border-radius:8px;color:var(--status-overdue)}.page-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem}.page-header h1{margin-bottom:.25rem}.section{margin-top:2rem}.section h2{font-size:1.1rem;margin-bottom:.75rem}.contact-card{display:flex;justify-content:space-between;align-items:flex-start;padding:1rem;border-bottom:1px solid var(--border)}.contact-card:last-child{border-bottom:none}.contact-name{font-weight:600}.contact-meta{color:var(--text-muted);font-size:.85rem}.badge-primary{background:var(--brand);color:var(--brand-contrast);font-size:.7rem;padding:.1rem .5rem;border-radius:999px;margin-left:.5rem}.note{padding:1rem;border-bottom:1px solid var(--border)}.note:last-child{border-bottom:none}.note-meta{color:var(--text-muted);font-size:.8rem;margin-bottom:.25rem}.form-row{display:flex;gap:.75rem;flex-wrap:wrap}.form-row .field{flex:1 1;min-width:160px}.checkbox-field{display:flex;align-items:center;gap:.5rem;margin-bottom:1rem}.checkbox-field input{width:auto}.checkbox-field label{margin-bottom:0}.button-row{display:flex;gap:.5rem}.detail-list{display:grid;grid-template-columns:100px 1fr;grid-row-gap:.5rem;row-gap:.5rem;grid-column-gap:1rem;column-gap:1rem;margin:0}.detail-list dt{color:var(--text-muted);font-size:.85rem}.detail-list dd{margin:0}.badge-archived{background:var(--text-muted);color:#fff;font-size:.75rem;padding:.15rem .6rem;border-radius:999px;margin-left:.5rem;vertical-align:middle}.empty{padding:2rem;text-align:center;color:var(--text-muted)}