:root{--color-bg:#f5f6f8;--color-surface:#fff;--color-border:#d9dde3;--color-text:#1f2430;--color-muted:#6b7280;--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-danger:#dc2626;--color-success:#16a34a;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{background:var(--color-bg);color:var(--color-text);margin:0}.app-shell{flex-direction:column;min-height:100vh;display:flex}.app-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;padding:.75rem 1.5rem;display:flex}.app-nav{gap:1.25rem;display:flex}.app-nav a{color:var(--color-text);font-weight:500;text-decoration:none}.app-nav a:hover{color:var(--color-primary)}.app-header-right{align-items:center;gap:1rem;display:flex}.current-username{color:var(--color-muted);font-size:.9rem}.app-main{flex:1;width:100%;max-width:960px;margin:0 auto;padding:2rem}.centered-page{justify-content:center;align-items:center;min-height:100vh;padding:1rem;display:flex}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:8px;padding:1.5rem}.login-card{flex-direction:column;gap:.5rem;width:100%;max-width:360px;display:flex}.login-card h1{margin:0 0 .25rem}label{margin-top:.5rem;font-size:.85rem;font-weight:600}input,select{border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);border-radius:6px;padding:.5rem .6rem;font-size:.95rem}.btn{cursor:pointer;text-align:center;border:1px solid #0000;border-radius:6px;padding:.55rem 1rem;font-size:.95rem;font-weight:600;text-decoration:none;display:inline-block}.btn-primary{background:var(--color-primary);color:#fff;margin-top:.75rem}.btn-primary:hover{background:var(--color-primary-hover)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:var(--color-surface);color:var(--color-text);border-color:var(--color-border)}.btn-secondary:hover{background:var(--color-bg)}.muted{color:var(--color-muted)}.hint{color:var(--color-muted);margin-top:1rem;font-size:.8rem}.error-text{color:var(--color-danger);margin:.25rem 0;font-size:.9rem}.success-text{color:var(--color-success);margin:.25rem 0;font-weight:600}.page-header{justify-content:space-between;align-items:center;margin-bottom:1rem;display:flex}.dashboard-card{max-width:420px;margin-top:1.5rem}.toolbar{gap:.75rem;margin-bottom:1rem;display:flex}.toolbar input[type=search]{flex:1;min-width:200px}.users-table{border-collapse:collapse;background:var(--color-surface);border:1px solid var(--color-border);border-radius:8px;width:100%;overflow:hidden}.users-table th,.users-table td{text-align:left;border-bottom:1px solid var(--color-border);padding:.65rem .9rem}.users-table th{text-transform:uppercase;letter-spacing:.03em;color:var(--color-muted);background:#fafbfc;font-size:.8rem}.users-table tbody tr:last-child td{border-bottom:none}.form-actions{align-items:center;gap:.75rem;margin-top:1rem;display:flex}.form-actions .btn-primary{margin-top:0}